javascript-html5是否存在不经用户点击就可以自动下载文件到指定路径的方法？—

html5是否存在不经用户点击就可以自动下载文件到指定路径的方法？

如题，html5是否存在不经用户点击就可以自动下载文件到指定路径的方法？

目前打算用html5实现网络测速，思路是从目标服务器下载一个约10M的文件到用户端计算下载速度，再将该文件上传回服务器计算上传速度并删除该用户端文件，使用html5能否实现？如果不能实现，有哪些可以实现网页测速的建议？

编辑于：2019.01.25 17:08 发布于：2019.01.24 09:57

| 评论0 | 收藏 | 浏览927 |

: 蒙牛君

声望： 2

6个回答

按赞数排序

恩，可以的
定义一个固定大小的js文件引入，或者通过ajax/websocket请求下载文件
之后就是根据时间计算网速了
上传的话差不多提前定义好内容将内容发送到服务器在服务器计算大小和时间
这两种方法不能下载到指定位置
但根据描述可以满足了吧除非你是要做钓鱼网站

编辑于：2019.01.24 16:25 发布于：2019.01.24 16:23

评论 0 |

| 已采纳

: 纵马饮白虹

声望： 69

只是要实现网页测速的话不需要下载文件。而且你下载文件也没办法获取下载完成的时间。
可以用ajax来做，用ajax加载一个大文件（注意要修改超时时间），可以很方面的获得加载的开始时间和结束时间。
计算上传速度也是一样用ajax以post方式提交大量数据就可以了。

发布于：2019.01.24 16:28

评论 0 |

: 天际的海浪

声望： 3149

测试网速也不需要上传下载文件啊、操作用户本地文件必须由用户发起操作的，测试网速你可以在后台获取IP、再去ping出返回包大小和返回时间
就可以计算出来了啊。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
</head>

<body bgcolor="transparent" style="color:#FFFFFF;">
<style type="text/css">
input{font-size:12px;padding:0 5px;line-height:21px; font-family:tahoma;border:1px solid #ccc;height:21px;}                        </style>
<script language="javascript">
tim=1
setInterval("tim++",100)
b=1
var autourl = new Array();
autourl[1] = "https://www.qq.com";
autourl[2] = "https://www.jb51.net";
autourl[3] = "https://www.baidu.com";
autourl[4] = "https://www.sina.com";

function butt(){
document.write("<form name=autof style='padding:0px; margin:0px;'>")
for (var i = 1; i < autourl.length; i++) document.write("<input type=text name=txt" + i + " size=25 style='color:#999;' value=测试中…> =》<input type=text name=url" + i + " size=40> =》<input type=button value=GO onclick=window.location.href=this.form.url" + i + ".value><br>")
document.write("<input onclick='window.location.reload()' type=submit value='刷新' style='margin-top:10px'></form>")
}
butt()
function auto(url){
document.forms[0]["url"+b].value=url
if(tim>200)
{document.forms[0]["txt"+b].value="网址"+b+"链接超时"}
else
{ document.forms[0]["txt" + b].value = "网址" + b + ": 访问速度" + tim * 10 + "ms" }
b++
}
function run(){for(var i=1;i<autourl.length;i++)document.write("<img src="+autourl[i]+"/"+Math.random()+" width=1 height=1 onerror=auto('"+autourl[i]+"') style='display:none'>")}
run()
</script>
</body>
</html>

编辑于：2019.01.24 10:24 发布于：2019.01.24 10:08

评论 2 |

: 洗洗脚泡泡澡

声望： 155

: 洗洗脚泡泡澡 回复蒙牛君: 那你要做的是钓鱼网站啊，而且钓鱼网站也不可能在用户无感知的情况下先下载、上传再删除的操作，一般浏览器下载都会有提示、上传就更不用说了，，，但是实现也不是不可以、需要讨论细节; 大约一年之前回复

: 蒙牛君 ping测网速不太准确吧？包太小，而且我既需要下载速度，也需要上传速度，请问有其他建议吗？; 大约一年之前回复

当然可以，网页初始化请求即可

发布于：2019.01.24 10:53

评论 0 |

: weixin_42955830

声望： 0

如果可以，那应该是浏览器的漏洞吧

发布于：2019.01.24 10:54

评论 0 |

: 潭溪Zerg

声望： 102

指定路径是不可能的。而且还要10M这么大，如果是测试网速，应该不需要做这个过程的。

发布于：2019.01.24 16:14

评论 0 |

: jybbh

声望： 10

: 插入链接

本地上传网络图片

上传中...

浏览

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插入图片

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ffmpeg用于hls直播的命令: 我想问一个关于ffmpeg用于hls直播的问题。之前有人跟我说，ffmpeg可以用一个命令行即可达到直播效果，具体为：接收udp流，切片成ts分片（m3u8文件自动更新）放到某指定目录下。在网上我查了很多，但是一直实现不了目标，网上的指令比如： ffmpeg -i udp://@:1234 -c copy -map 0 -f segment -segment_list playlist.m3u8 -segment_time 10 outputd.ts 或者这样的： ffmpeg -i udp://@:1234 -c copy -map 0 -f hls -hls_time 2.0 -hls_list_size 5 -hls_wrap 5 G:\nginx\html\test.m3u8 还有这种的： ffmpeg -i udp://@:1234 -c:v libx264 -c:a aac -f hls -hls_list_size 5 -hls_wrap 5 /usr/local/nginx/html/test.m3u8 我用的windows7系统，想接收udp流并切片到G:\nginx\html 下，实在不清楚这个命令行该怎么写才行，由于时间紧急，我来不及去查阅ffmpeg的文档，请大家指点迷津。希望各位能解答我的问题，谢谢！

jQuery上传插件Uploadify 3.2在.NET下的详细例子: 项目中要使用Uploadify 3.2来实现图片上传并生成缩略通的功能，特此记下来，以供各位参考！ Uploadify下载地址：http://www.uploadify.com/download/ 下载下来解压后估计里面很多文件，其实有用的也就jquery.uploadify.min.js、uploadify.css、uploadify.swf和uploadify-cancel.png这四个文件。你还得下载jQuery库，我这里用的是jquery-1.7.2.min.js，另外和大多数JQ插件一样，同时也需要swfobject.js这个插件，我的是2.2的版本，东西都准备好了，那下面就开始。前端界面： [html] view plain copy <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="jqUploadify._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>无标题页</title> <link href="scripts/uploadify.css" rel="stylesheet" type="text/css" /> <link href="scripts/default.css" rel="stylesheet" type="text/css" /> <script src="scripts/jquery-1.7.2.min.js" type="text/javascript"></script> <script src="scripts/swfobject.js" type="text/javascript"></script> <script src="scripts/jquery.uploadify.min.js" type="text/javascript"></script> <script type="text/javascript"> $(function(){ $("#file_upload").uploadify({ //开启调试 'debug' : false, //是否自动上传 'auto':false, 'buttonText':'选择照片', //flash 'swf': "scripts/uploadify.swf", //文件选择后的容器ID 'queueID':'uploadfileQueue', 'uploader':'scripts/upload.ashx', 'width':'75', 'height':'24', 'multi':false, 'fileTypeDesc':'支持的格式：', 'fileTypeExts':'*.jpg;*.jpge;*.gif;*.png', 'fileSizeLimit':'1MB', 'removeTimeout':1, //返回一个错误，选择文件的时候触发 'onSelectError':function(file, errorCode, errorMsg){ switch(errorCode) { case -100: alert("上传的文件数量已经超出系统限制的"+$('#file_upload').uploadify('settings','queueSizeLimit')+"个文件！"); break; case -110: alert("文件 ["+file.name+"] 大小超出系统限制的"+$('#file_upload').uploadify('settings','fileSizeLimit')+"大小！"); break; case -120: alert("文件 ["+file.name+"] 大小异常！"); break; case -130: alert("文件 ["+file.name+"] 类型不正确！"); break; } }, //检测FLASH失败调用 'onFallback':function(){ alert("您未安装FLASH控件，无法上传图片！请安装FLASH控件后再试。"); }, //上传到服务器，服务器返回相应信息到data里 'onUploadSuccess':function(file, data, response){ //alert(data); } }); }); function doUplaod(){ $('#file_upload').uploadify('upload','*'); } function closeLoad(){ $('#file_upload').uploadify('cancel','*'); } </script> </head> <body> <table width="704" border="0" align="center" cellpadding="0" cellspacing="0" id="__01"> <tr> <td align="center" valign="middle"> <div id="uploadfileQueue" style="padding: 3px;"> </div> <div id="file_upload"> </div> </td> </tr> <tr> <td height="50" align="center" valign="middle"> <img alt="" src="images/BeginUpload.gif" width="77" height="23" onclick="doUplaod()" style="cursor: hand" /> <img alt="" src="images/CancelUpload.gif" width="77" height="23" onclick="closeLoad()" style="cursor: hand" /> </td> </tr> </table> </body> </html> 后端的Handler： [csharp] view plain copy using System; using System.Collections; using System.Data; using System.Linq; using System.Web; using System.Web.Services; using System.Web.Services.Protocols; using System.Xml.Linq; using System.Web.SessionState; using System.IO; namespace jqUploadify.scripts { /// <summary> /// $codebehindclassname$ 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class upload : IHttpHandler, IRequiresSessionState { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; context.Response.Charset = "utf-8"; HttpPostedFile file = context.Request.Files["Filedata"]; string uploadPath = context.Server.MapPath("..\\uploads\\"); if (file != null) { if (!Directory.Exists(uploadPath)) { Directory.CreateDirectory(uploadPath); } file.SaveAs(uploadPath + file.FileName); //生成缩略图 MakeThumbnail(uploadPath + file.FileName, uploadPath + "\\s\\" + file.FileName, 80, 80); } } private void MakeThumbnail(string sourcePath, string newPath, int width, int height) { System.Drawing.Image ig = System.Drawing.Image.FromFile(sourcePath); int towidth = width; int toheight = height; int x = 0; int y = 0; int ow = ig.Width; int oh = ig.Height; if ((double)ig.Width / (double)ig.Height > (double)towidth / (double)toheight) { oh = ig.Height; ow = ig.Height * towidth / toheight; y = 0; x = (ig.Width - ow) / 2; } else { ow = ig.Width; oh = ig.Width * height / towidth; x = 0; y = (ig.Height - oh) / 2; } System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight); System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.Clear(System.Drawing.Color.Transparent); g.DrawImage(ig, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel); try { bitmap.Save(newPath, System.Drawing.Imaging.ImageFormat.Jpeg); } catch (Exception ex) { throw ex; } finally { ig.Dispose(); bitmap.Dispose(); g.Dispose(); } } public bool IsReusable { get { return false; } } } } 这样我们就是实现图片上传至uploads，生成的缩略图（这里设为80*80）存放在uploads下面的s文件夹中，是不是很简单呢！当然实际使用过程你还可能碰到一下的问题： 1、在火狐下session出现丢失的情况，可以参考这里：http://www.cnblogs.com/akingyao/archive/2012/09/04/2670794.html 2、IE9出现了按钮不能点击的问题，可以参考这里：http://www.uploadify.com/forum/#/discussion/9155/uploadify-version-3-2-does-not-work-in-ie9/p1 最后贴一个Uploadify参数说明： Uploadify Version 3.2 Options选项设置 auto 选择文件后自动上传 buttonClass 给“浏览按钮”加css的class样式 buttonCursor 鼠标移上去形状：arrow箭头、hand手型（默认） buttonImage 鼠标移上去变换图片 buttonText 按钮文字 checkExisting 在目录中检查文件是否已上传成功（1 ture,0 false） debug 是否显示调试框（默认不显示false） fileObjName 设置一个名字，在服务器处理程序中根据该名字来取上传文件的数据。默认为Filedata，$tempFile = $_FILES['Filedata']['tmp_name'] fileSizeLimit 设置允许上传文件最大值B, KB, MB, GB 比如：'fileSizeLimit' : '20MB' fileTypeDesc 选择的文件的描述。这个字符串出现在浏览文件对话框中文件类型下拉框处。默认：All Files fileTypeExts 允许上传的文件类型。格式：'fileTypeExts' : '*.gif; *.jpg; *.png' formData 附带值，需要通过get or post传递的额外数据，需要结合onUploadStart事件一起使用 height “浏览按钮”高度px itemTemplate <itemTemplate>节点表示显示的内容。这些内容中也可以包含绑定到控件DataSource属性中元素集合的数据。 method 上传方式。默认：post multi 选择文件时是否可以【选择多个】。默认：可以true overrideEvents 不执行默认的onSelect事件 preventCaching 随机缓存值默认true ，可选true和false.如果选true,那么在上传时会加入一个随机数来使每次的URL都不同,以防止缓存.但是可能与正常URL产生冲突 progressData 进度条上显示的进度:有百分比percentage和速度speed。默认百分比 queueID 给“进度条”加背景css的ID样式。文件选择后的容器ID queueSizeLimit 允许多文件上传的数量。默认：999 removeCompleted 上传完成后队列是否自动消失。默认：true removeTimeout 上传完成后队列多长时间后消失。默认 3秒需要：'removeCompleted' : true,时使用 requeueErrors 队列上传出错，是否继续回滚队列，即反复尝试上传。默认：false successTimeout 上传超时时间。文件上传完成后,等待服务器返回信息的时间(秒).超过时间没有返回的话,插件认为返回了成功。默认：30秒 swf swf文件的路径,本文件是插件自带的,不可用其它的代替.本参数不可省略 uploader 上传处理程序URL，本参数不可省略 uploadLimit 限制总上传文件数,默认是999。指同一时间，如果关闭浏览器后重新打开又可上传。 width “浏览按钮”宽度px Events 事件 onCancel 当取消一个上传队列中的文件时触发,删除时触发 onClearQueue 清除队列。当'cancel'方法带着*参数时,也就是说一次全部取消的时候触发.queueItemCount是被取消的文件个数（另外的按钮） onDestroy 取消所有的上传队列（另外的按钮） onDialogClose 当选择文件对话框关闭时触发,不论是点的'确定'还是'取消'都会触发.如果本事件被添加进了'overrideEvents'参数中,那么如果在选择文件时产生了错误,不会有错误提示框弹出 onDialogOpen 当选择文件框被打开时触发,没有传过来的参数 onDisable 关闭上传 onEnable 开启上传 onFallback 检测FLASH失败调用 onInit 每次初始化一个队列时触发 onQueueComplete 当队列中的所有文件上传完成时触发 onSelect 当文件从浏览框被添加到队列中时触发 onSelectError 选择文件出错时触发 onSWFReady flash准备好时触发 onUploadComplete当一个文件上传完成时触发 onUploadError 当文件上传完成但是返回错误时触发 onUploadProgress上传汇总 onUploadStart 一个文件上传之间触发 onUploadSuccess 每个上传完成并成功的文件都会触发本事件 Methods 方法 cancel 取消一个上传队列 destroy 取消所有上传队列 disable 禁止点击“浏览按钮” settings 返回或修改一个 uploadify实例的settings值 stop 停止当前的上传并重新添加到队列中去 upload 上传指定的文件或者所有队列中的文件最后是DEMO的下载地址：http://download.csdn.net/detail/wangqiuyun/566551

Springmvc 访问html页面: 原来配置完能访问jsp，现在想把一些jsp替换成html，出现404了。。修改了一下拦截和视图配置，没有用啊。。。 ![图片说明](https://img-ask.csdn.net/upload/201512/13/1449982013_918688.png) web.xml ``` <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name>T8</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml,classpath:spring-mvc.xml</param-value> </context-param> <filter> <description>字符集过滤器</description> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <description>字符集编码</description> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <listener> <description>spring监听器</description> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener>  <servlet> <description>spring mvc servlet</description> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <description>spring mvc 配置文件</description> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name>  <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index</welcome-file> </welcome-file-list> </web-app> ``` spring-mvc.xml ``` <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/" p:suffix=".jsp" /> ```

请问no module named xxx.spiders报错怎么解决: 我初学scrapy爬虫，在github上下载了一个工程用pycharm运行了一下是没有问题的，然后在cmd中通过scrapy crawl xiaohuar 的命令运行爬虫的时候出现了 no module named xiaohuar.spiders 的报错代码如下： #coding=utf-8 import scrapy import re import os import urllib from scrapy.selector import Selector from scrapy.http import HtmlResponse, Request class Xiaohuar_spider(scrapy.spiders.Spider): name = "xiaohuar" allowed_domains = ["xiaohuar.com"] # 搜索的域名范围，也就是爬虫的约束区域，规定爬虫只爬取这个域名下的网页 start_urls = ["http://www.xiaohuar.com/list-1-1.html"] # 该函数名不能改变，因为Scrapy源码中默认callback函数的函数名就是parse def parse(self, response): current_url = response.url # 爬取时请求的url body = response.body # 返回的html unicode_body = response.body_as_unicode() # 返回的html unicode hxs = Selector(response) # 创建查询对象，HtmlXPathSelector已过时 if re.match('http://www.xiaohuar.com/list-1-\d+.html', response.url): # 如果url能够匹配到需要爬取的url，就爬取 items = hxs.xpath('//div[@class="item_list infinite_scroll"]/div') # 匹配到大的div下的所有小div（每个小div中包含一个图片） for i in range(len(items)): # 遍历div个数 src = hxs.xpath( '//div[@class="item_list infinite_scroll"]/div[%d]//div[@class="img"]/a/img/@src' % i).extract() # 查询所有img标签的src属性，即获取校花图片地址 name = hxs.xpath( '//div[@class="item_list infinite_scroll"]/div[%d]//div[@class="img"]/span/text()' % i).extract() # 获取span的文本内容，即校花姓名 school = hxs.xpath( '//div[@class="item_list infinite_scroll"]/div[%d]//div[@class="img"]/div[@class="btns"]/a/text()' % i).extract() # 校花学校 if src: absoluteSrc = "http://www.xiaohuar.com" + src[ 0] # 拼接实际路径,因为.extract()会返回一个list，但是我们是依次取得div，所以是取第0个 file_name = "%s_%s.jpg" % (school[0], name[0]) # 拼接文件名，学校_姓名 file_path = os.path.join("E:\file", file_name) # 拼接这个图片的路径下 urllib.urlretrieve(absoluteSrc, file_path) # 接收文件路径和需要保存的路径，会自动去文件路径下载并保存到我们指定的本地路径 all_urls = hxs.xpath('//a/@href').extract() # 提取界面所有的url for url in all_urls: # 遍历获得的url，如果满足条件，继续爬取 if url.startswith('http://www.xiaohuar.com/list-1-'): yield Request(url, callback=self.parse) ![图片说明](https://img-ask.csdn.net/upload/201705/06/1494051852_23735.png) 整个工程的文件就是这样请问各位大神这个问题出在哪里，怎么解决呢？

IO读写错误--at java.io.FileInputStream.open(Native Me: 大家好：本人在io读写时陷入了困境，希望各位能给予帮助，情况如下： 1，我有段程式要写文件，本来能程式也跑的很欢快的，写文件时，如没有该文件，就会自动创建一个（感觉很美好） 2，某天，程式忽然就罢工了，还提出以下请求 Exception in thread "main" java.io.FileNotFoundException: D:\PageCapture\index.html (系統找不到指定的路徑。) at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:179) at java.io.FileOutputStream.<init>(FileOutputStream.java:70) at java.io.FileWriter.<init>(FileWriter.java:46) at pagecapture.Page.SaveAsFile(Page.java:87) at pagecapture.Main.main(Main.java:12) 源码很简单但就是在没有该文件的时候不肯写文件了（如果有这个文件就不会报错） 3，想了想我改了改代码，在读写前加上了File.createNewFile()结果如下 java.io.IOException: 系統找不到指定的路徑。 at java.io.WinNTFileSystem.createFileExclusively(Native Method) at java.io.File.createNewFile(File.java:883) at pagecapture.Page.SaveAsFile(Page.java:87) at pagecapture.Main.main(Main.java:12) 心有所感，总觉得这个应该与操作系统或JVM有关（代码很标准规范）不知道哪位前辈先人有遇到过这个问题，敬请指点，不胜感激

ffmpeg实现web上视频转码为mp4格式用video标签却无法播放: 1.问题描述：调用ffmpeg将avi格式视频转码->mp4格式，使用最简单的<video>标签进行播放只能播放声音，没有画面（黑屏）。而暴风影音等本地视频播放软件却能够正常播放转码后的视频。 2.环境：SSH框架准备实现视频上传后的自动转码并且能够网页内播放，火狐浏览器。 3.已知mp4格式分为两种，其中H264类型才能进行html播放，但按照转码命令说已经转码成：视频H264、音频aac格式了，但是仍然是黑屏（有声音）。 4.未知：（1）转码时显示的相关命令行具体意义。（2）网上所说用格式工厂进行转码即可，有没有能够通过代码调用的视频转码方法予以解决呢？ 5.以下为问题截图：（1）视频转码Java代码： ``` List<String> convert = new ArrayList<String>(); convert.add(ffmpegPath); // 添加转换工具路径 convert.add("-i"); // 添加参数＂-i＂，该参数指定要转换的文件 convert.add(sourceVideoPath); // 添加要转换格式的视频文件的路径 convert.add("-acodec"); convert.add("aac"); convert.add("-vcodec"); convert.add("libx264"); convert.add("-y"); convert.add(targetFolder+fileRealNameNoExtension+targetExtension); ``` （2）转码时的输出： ``` ffmpeg version N-93678-g4b7166c9d5 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8.3.1 (GCC) 20190414 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 26.100 / 56. 26.100 libavcodec 58. 52.100 / 58. 52.100 libavformat 58. 27.103 / 58. 27.103 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 50.100 / 7. 50.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Input #0, avi, from 'E:\Test\projectVideos\temp\1557994804863.avi': Metadata: genre : Other track : 1 encoder : Lavf54.63.104 Duration: 00:00:16.80, start: 0.000000, bitrate: 2286 kb/s Stream #0:0: Video: h264 (Main) (H264 / 0x34363248), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 2151 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, fltp, 128 kb/s Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (mp3 (mp3float) -> aac (native)) Press [q] to stop, [?] for help [libx264 @ 0000000002ebf4c0] using SAR=1/1 [libx264 @ 0000000002ebf4c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [libx264 @ 0000000002ebf4c0] profile Progressive High, level 4.0, 4:2:0, 8-bit [libx264 @ 0000000002ebf4c0] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'E:\Test\projectVideos\encvideos\1557994804863.mp4': Metadata: genre : Other track : 1 encoder : Lavf58.27.103 Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc58.52.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 69 kb/s Metadata: encoder : Lavc58.52.100 aac frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.06 bitrate= 5.5kbits/s speed=0.138x frame= 46 fps= 23 q=0.0 size= 0kB time=00:00:01.88 bitrate= 0.2kbits/s speed=0.936x frame= 64 fps= 25 q=28.0 size= 0kB time=00:00:02.57 bitrate= 0.1kbits/s speed=1.02x frame= 88 fps= 29 q=28.0 size= 0kB time=00:00:03.55 bitrate= 0.1kbits/s speed=1.17x frame= 108 fps= 31 q=28.0 size= 0kB time=00:00:04.34 bitrate= 0.1kbits/s speed=1.23x frame= 133 fps= 33 q=28.0 size= 0kB time=00:00:05.34 bitrate= 0.1kbits/s speed=1.32x frame= 155 fps= 34 q=28.0 size= 0kB time=00:00:06.22 bitrate= 0.1kbits/s speed=1.35x frame= 171 fps= 33 q=28.0 size= 0kB time=00:00:06.87 bitrate= 0.1kbits/s speed=1.33x frame= 186 fps= 33 q=28.0 size= 0kB time=00:00:07.47 bitrate= 0.1kbits/s speed=1.32x frame= 195 fps= 31 q=28.0 size= 0kB time=00:00:07.82 bitrate= 0.0kbits/s speed=1.25x frame= 206 fps= 30 q=28.0 size= 0kB time=00:00:08.26 bitrate= 0.0kbits/s speed=1.22x frame= 214 fps= 29 q=28.0 size= 0kB time=00:00:08.59 bitrate= 0.0kbits/s speed=1.17x frame= 223 fps= 28 q=28.0 size= 0kB time=00:00:08.96 bitrate= 0.0kbits/s speed=1.14x frame= 229 fps= 27 q=28.0 size= 0kB time=00:00:09.19 bitrate= 0.0kbits/s speed=1.09x frame= 232 fps= 25 q=28.0 size= 0kB time=00:00:09.28 bitrate= 0.0kbits/s speed=1.01x frame= 235 fps= 24 q=28.0 size= 256kB time=00:00:09.42 bitrate= 222.5kbits/s speed=0.965x frame= 240 fps= 23 q=28.0 size= 256kB time=00:00:09.63 bitrate= 217.7kbits/s speed=0.928x frame= 243 fps= 22 q=28.0 size= 256kB time=00:00:09.72 bitrate= 215.6kbits/s speed=0.894x frame= 247 fps= 21 q=28.0 size= 256kB time=00:00:09.89 bitrate= 212.1kbits/s speed=0.856x frame= 253 fps= 21 q=28.0 size= 512kB time=00:00:10.12 bitrate= 414.3kbits/s speed=0.832x frame= 258 fps= 20 q=28.0 size= 512kB time=00:00:10.33 bitrate= 406.0kbits/s speed=0.812x frame= 264 fps= 20 q=28.0 size= 512kB time=00:00:10.56 bitrate= 397.0kbits/s speed=0.791x frame= 268 fps= 19 q=28.0 size= 768kB time=00:00:10.72 bitrate= 586.5kbits/s speed=0.773x frame= 272 fps= 19 q=28.0 size= 768kB time=00:00:10.91 bitrate= 576.5kbits/s speed=0.753x frame= 278 fps= 19 q=28.0 size= 768kB time=00:00:11.14 bitrate= 564.5kbits/s speed=0.743x frame= 281 fps= 18 q=28.0 size= 768kB time=00:00:11.26 bitrate= 558.7kbits/s speed=0.725x frame= 286 fps= 18 q=28.0 size= 1024kB time=00:00:11.47 bitrate= 731.3kbits/s speed=0.715x frame= 291 fps= 17 q=28.0 size= 1024kB time=00:00:11.67 bitrate= 718.3kbits/s speed=0.701x frame= 296 fps= 17 q=25.0 size= 1024kB time=00:00:11.86 bitrate= 707.0kbits/s speed=0.687x frame= 303 fps= 17 q=28.0 size= 1280kB time=00:00:12.14 bitrate= 863.5kbits/s speed=0.681x frame= 308 fps= 17 q=28.0 size= 1280kB time=00:00:12.35 bitrate= 848.9kbits/s speed=0.67x frame= 312 fps= 16 q=28.0 size= 1280kB time=00:00:12.51 bitrate= 837.8kbits/s speed=0.661x frame= 319 fps= 16 q=28.0 size= 1280kB time=00:00:12.79 bitrate= 819.6kbits/s speed=0.658x frame= 341 fps= 17 q=28.0 size= 1280kB time=00:00:13.65 bitrate= 768.0kbits/s speed=0.684x frame= 362 fps= 18 q=28.0 size= 1280kB time=00:00:14.48 bitrate= 723.7kbits/s speed=0.708x frame= 391 fps= 19 q=28.0 size= 1280kB time=00:00:15.67 bitrate= 669.0kbits/s speed=0.746x frame= 419 fps= 19 q=28.0 size= 1280kB time=00:00:16.67 bitrate= 629.0kbits/s speed=0.774x frame= 419 fps= 19 q=-1.0 Lsize= 1538kB time=00:00:16.71 bitrate= 753.7kbits/s speed=0.753x video:1480kB audio:43kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.976535% [libx264 @ 0000000002ebf4c0] frame I:2 Avg QP:13.37 size: 32816 [libx264 @ 0000000002ebf4c0] frame P:143 Avg QP:14.70 size: 6977 [libx264 @ 0000000002ebf4c0] frame B:274 Avg QP:13.65 size: 1647 [libx264 @ 0000000002ebf4c0] consecutive B-frames: 9.8% 7.6% 4.3% 78.3% [libx264 @ 0000000002ebf4c0] mb I I16..4: 38.7% 53.1% 8.1% [libx264 @ 0000000002ebf4c0] mb P I16..4: 17.5% 18.5% 0.2% P16..4: 5.5% 0.4% 0.2% 0.0% 0.0% skip:57.7% [libx264 @ 0000000002ebf4c0] mb B I16..4: 2.0% 0.7% 0.0% B16..8: 3.7% 0.2% 0.0% direct: 2.9% skip:90.5% L0:49.2% L1:48.4% BI: 2.4% [libx264 @ 0000000002ebf4c0] 8x8 transform intra:48.1% inter:84.8% [libx264 @ 0000000002ebf4c0] coded y,uvDC,uvAC intra: 3.9% 31.3% 4.5% inter: 0.7% 5.4% 0.2% [libx264 @ 0000000002ebf4c0] i16 v,h,dc,p: 22% 68% 4% 6% [libx264 @ 0000000002ebf4c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 27% 42% 0% 0% 0% 0% 0% 0% [libx264 @ 0000000002ebf4c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 28% 24% 2% 4% 3% 4% 2% 3% [libx264 @ 0000000002ebf4c0] i8c dc,h,v,p: 48% 39% 11% 2% [libx264 @ 0000000002ebf4c0] Weighted P-Frames: Y:23.1% UV:22.4% [libx264 @ 0000000002ebf4c0] ref P L0: 65.5% 9.2% 23.1% 1.9% 0.3% [libx264 @ 0000000002ebf4c0] ref B L0: 71.1% 28.4% 0.5% [libx264 @ 0000000002ebf4c0] ref B L1: 98.8% 1.2% [libx264 @ 0000000002ebf4c0] kb/s:723.03 [aac @ 0000000002dc0980] Qavg: 47784.133 生成mp4视频为:E:\Test\projectVideos\temp\1557994804863.mp4 ``` (3)播放时的截图 ![图片说明](https://img-ask.csdn.net/upload/201905/16/1557997780_707491.png) (4) 播放视频jsp代码（使用的是video-js，但测试时也试了一下不加视频插件直接<video>标签播放，结果一样） ``` <video id="playVideo" class="video-js vjs-default-skin" controls ="true" preload="auto" width="960" height="480" poster="/images/${VIDEO.vpicture}" data-setup='{}'> <source src="/videos/${VIDEO.vpath}" type='video/mp4' /> </video> ``` （"/videos"为虚拟路径实为本地存储地址）希望好心人能够予以慷慨解答！~ 补充：在转wmv格式到MP4格式时出现了 ``` ConverVideoTest说:传入工具类的源视频为:E:\Test\projectVideos\temp\1558578421815.wmv ----接收到文件(E:\Test\projectVideos\temp\1558578421815.wmv)需要转换------- ----开始转文件(E:\Test\projectVideos\temp\1558578421815.wmv)-------------------------- 源视频类型为:wmv 可以转换,统一转为mp4文件调用了ffmpeg.exe工具该文件夹存在。 ffmpeg输入的命令：E:\ffmpeg\bin\ffmpeg.exe-iE:\Test\projectVideos\temp\1558578421815.wmv-acodecaac-vcodeclibx264-yE:\Test\projectVideos\encvideos\1558578421815.mp4 ffmpeg version N-93678-g4b7166c9d5 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8.3.1 (GCC) 20190414 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 26.100 / 56. 26.100 libavcodec 58. 52.100 / 58. 52.100 libavformat 58. 27.103 / 58. 27.103 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 50.100 / 7. 50.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Input #0, asf, from 'E:\Test\projectVideos\temp\1558578421815.wmv': Metadata: DeviceConformanceTemplate: M1 WMFSDKNeeded : 0.0.0.0000 WM/WMADRCPeakReference: 7851 WM/WMADRCPeakTarget: 7851 WM/WMADRCAverageReference: 1027 WM/WMADRCAverageTarget: 1027 WMFSDKVersion : 12.0.7601.17514 IsVBR : 0 Duration: 00:00:16.58, bitrate: 1969 kb/s Stream #0:0(chi): Audio: wmapro (b[1][0][0] / 0x0162), 48000 Hz, stereo, fltp, 256 kb/s Stream #0:1(chi): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1352x696 [SAR 1:1 DAR 169:87], 3400 kb/s, 30 tbr, 1k tbn, 60 tbc Stream mapping: Stream #0:1 -> #0:0 (vc1 (native) -> h264 (libx264)) Stream #0:0 -> #0:1 (wmapro (native) -> aac (native)) Press [q] to stop, [?] for help [libx264 @ 0000000000531c80] using SAR=1/1 [libx264 @ 0000000000531c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [libx264 @ 0000000000531c80] profile Progressive High, level 3.2, 4:2:0, 8-bit [libx264 @ 0000000000531c80] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 frame= 11 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s dup=1 drop=0 speed=N/A frame= 52 fps= 48 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s dup=1 drop=0 speed=N/A frame= 85 fps= 54 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s dup=1 drop=0 speed=N/A frame= 145 fps= 64 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s dup=47 drop=0 speed=N/A frame= 171 fps= 61 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s dup=55 drop=0 speed=N/A Too many packets buffered for output stream 0:0. [libx264 @ 0000000000531c80] frame I:2 Avg QP:15.28 size: 56950 [libx264 @ 0000000000531c80] frame P:34 Avg QP:14.18 size: 1252 [libx264 @ 0000000000531c80] frame B:93 Avg QP:15.53 size: 140 [libx264 @ 0000000000531c80] consecutive B-frames: 3.1% 1.6% 2.3% 93.0% [libx264 @ 0000000000531c80] mb I I16..4: 14.9% 79.5% 5.6% [libx264 @ 0000000000531c80] mb P I16..4: 0.7% 1.1% 0.0% P16..4: 4.1% 1.4% 1.3% 0.0% 0.0% skip:91.4% [libx264 @ 0000000000531c80] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 3.6% 0.0% 0.0% direct: 0.0% skip:96.4% L0:36.8% L1:63.2% BI: 0.0% [libx264 @ 0000000000531c80] 8x8 transform intra:74.4% inter:80.1% [libx264 @ 0000000000531c80] coded y,uvDC,uvAC intra: 38.4% 33.4% 20.3% inter: 0.5% 0.2% 0.0% [libx264 @ 0000000000531c80] i16 v,h,dc,p: 61% 25% 9% 6% [libx264 @ 0000000000531c80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 31% 21% 2% 3% 3% 3% 3% 3% [libx264 @ 0000000000531c80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 32% 14% 4% 5% 5% 5% 4% 6% [libx264 @ 0000000000531c80] i8c dc,h,v,p: 76% 13% 8% 4% [libx264 @ 0000000000531c80] Weighted P-Frames: Y:0.0% UV:0.0% [libx264 @ 0000000000531c80] ref P L0: 85.1% 6.8% 6.5% 1.6% [libx264 @ 0000000000531c80] ref B L0: 48.1% 47.5% 4.4% [libx264 @ 0000000000531c80] ref B L1: 93.2% 6.8% [libx264 @ 0000000000531c80] kb/s:315.41 **Conversion failed!** 生成mp4视频为:E:\Test\projectVideos\temp1558578421815.mp4 ===========视频转码结束，开始截图================= 该文件夹存在。截图命令：E:\ffmpeg\bin\ffmpeg.exe-ss00:00:01-iE:\Test\projectVideos\temp\1558578421815.wmv-y-fimage2-s154x90E:\Test\projectVideos\images\1558578421815.jpg ffmpeg version N-93678-g4b7166c9d5 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8.3.1 (GCC) 20190414 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 26.100 / 56. 26.100 libavcodec 58. 52.100 / 58. 52.100 libavformat 58. 27.103 / 58. 27.103 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 50.100 / 7. 50.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Input #0, asf, from 'E:\Test\projectVideos\temp\1558578421815.wmv': Metadata: DeviceConformanceTemplate: M1 WMFSDKNeeded : 0.0.0.0000 WM/WMADRCPeakReference: 7851 WM/WMADRCPeakTarget: 7851 WM/WMADRCAverageReference: 1027 WM/WMADRCAverageTarget: 1027 WMFSDKVersion : 12.0.7601.17514 IsVBR : 0 Duration: 00:00:16.58, bitrate: 1969 kb/s Stream #0:0(chi): Audio: wmapro (b[1][0][0] / 0x0162), 48000 Hz, stereo, fltp, 256 kb/s Stream #0:1(chi): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1352x696 [SAR 1:1 DAR 169:87], 3400 kb/s, 30 tbr, 1k tbn, 60 tbc Stream mapping: Stream #0:1 -> #0:0 (vc1 (native) -> mjpeg (native)) Press [q] to stop, [?] for help [swscaler @ 0000000002ecd4c0] deprecated pixel format used, make sure you did set range correctly Output #0, image2, to 'E:\Test\projectVideos\images\1558578421815.jpg': Metadata: DeviceConformanceTemplate: M1 WMFSDKNeeded : 0.0.0.0000 WM/WMADRCPeakReference: 7851 WM/WMADRCPeakTarget: 7851 WM/WMADRCAverageReference: 1027 WM/WMADRCAverageTarget: 1027 WMFSDKVersion : 12.0.7601.17514 IsVBR : 0 encoder : Lavf58.27.103 Stream #0:0(chi): Video: mjpeg, yuvj420p(pc), 154x90 [SAR 2535:2233 DAR 169:87], q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc Metadata: encoder : Lavc58.52.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 [image2 @ 0000000000628e00] Could not get frame filename number 2 from pattern 'E:\Test\projectVideos\images\1558578421815.jpg'. Use '-frames:v 1' for a single image, or '-update' option, or use a pattern such as %03d within the filename. av_interleaved_write_frame(): Invalid argument frame= 2 fps=0.0 q=1.6 size=N/A time=00:00:00.06 bitrate=N/A speed=0.102x frame= 2 fps=0.0 q=1.6 Lsize=N/A time=00:00:00.06 bitrate=N/A speed=0.097x video:3kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Conversion failed! 截图进程结束截图成功！ ``` 即出现了Conversion failed！！！

Spring MVC访问不了Controller: web.xml配置 ``` <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:DispatcherServlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet>  <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping> ``` DispatcherServlet.xml配置 ```  <context:annotation-config />  <import resource="classpath:jdbc.xml" />  <context:component-scan base-package="com.user.controller"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan>  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />  <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> <property name="interceptors"> <list> <bean class="com.inteceptor.SelfInteceptor" /> </list> </property> </bean> <bean class="org.springframework.http.converter.StringHttpMessageConverter" > <constructor-arg value="UTF-8" index="0" /> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=UTF-8</value> <value>text/html;charset=UTF-8</value> </list> </property> </bean>  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" />  <property name="order" value="2" /> </bean> ``` index.jsp配置 ``` $(function(){ $.ajax({ type:'post', url:'userController/getAllUsers.htm', data:{}, dataType:'html', success:function(){ alert(1111); }, error:function(XMLHttpRequest, textStatus, errorThrown){ alert(XMLHttpRequest.status); } }); }); ``` UserController配置 ``` @Controller @RequestMapping("/userController") public class UserController { @RequestMapping("/getAllUsers") @ResponseBody public String getAllUsers(){ System.out.println("lalallalalalalalallala"); return ""; } } ``` 最后访问：http://localhost:8080/zheng/index.jsp 可是后台没报错，浏览器打印了“1111”，就是没进controller层。。

今天小妹搭一个ssm框架，但是就是报404，大神能帮忙看一下吗: 1.先贴上代码结构 ![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372058_795994.png) 2.配置如下 web.xml ![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372803_835812.png)![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372813_171670.png)![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372821_410087.png) spring-mvc.xml 如下： <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  <context:component-scan base-package="com.part3.controller" />  <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean>  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" />  </list> </property> </bean>  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean>  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  <property name="defaultEncoding" value="utf-8" />  <property name="maxUploadSize" value="10485760000" />  <property name="maxInMemorySize" value="40960" /> </bean> </beans> ``` spring-mybatis.xml 如下 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <context:annotation-config />  <context:component-scan base-package="com.part3.controller"/> <context:component-scan base-package="com.part3.service"/> <context:component-scan base-package="com.part3.dao" />  <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  <property name="locations"> <list> <value>classpath:log4j.properties</value> <value>classpath:jdbc.properties</value> </list> </property> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${driver}" /> <property name="url" value="${url}" /> <property name="username" value="${username}" /> <property name="password" value="${password}" />  <property name="initialSize" value="${initialSize}"></property>  <property name="maxActive" value="${maxActive}"></property>  <property name="maxIdle" value="${maxIdle}"></property>  <property name="minIdle" value="${minIdle}"></property>  <property name="maxWait" value="${maxWait}"></property> </bean>  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:sqlMapConfig.xml" /> <property name="typeAliasesPackage" value="com.part3.pojo" />    <property name="mapperLocations"> <list>  <value>classpath:com/part3/mapping/*.xml</value> </list> </property> </bean>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.part3.mapping" /> <property name="markerInterface" value="com.part3.mapping.SqlMapper" /> </bean>  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> </beans> ``` sqlMapConfig.xml 如下 <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration>  <settings>  <setting name="cacheEnabled" value="true"/>  <setting name="lazyLoadingEnabled" value="true"/>  <setting name="aggressiveLazyLoading" value="true"/>  <setting name="multipleResultSetsEnabled" value="true"/>  <setting name="useColumnLabel" value="true"/>  <setting name="useGeneratedKeys" value="false"/>  <setting name="autoMappingBehavior" value="PARTIAL"/>  <setting name="defaultExecutorType" value="SIMPLE"/>  <setting name="defaultStatementTimeout" value="25000"/>  <setting name="safeRowBoundsEnabled" value="false"/>  <setting name="mapUnderscoreToCamelCase" value="false"/>  <setting name="localCacheScope" value="SESSION"/>  <setting name="jdbcTypeForNull" value="OTHER"/>  <setting name="lazyLoadTriggerMethods" value="equals,clone,hashCode,toString"/> </settings>  </configuration> ``` ``` 运行后，控制台如下![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372724_823687.png) 页面如下，直接执行报错404![图片说明](https://img-ask.csdn.net/upload/201802/23/1519372736_100549.png) 就是找不出什么问题，小妹实在无奈了，有大神帮忙看看吗？自学很累

Gulp运行Browser-sync报错提示: ![图片说明](https://img-ask.csdn.net/upload/201711/01/1509512536_278564.png) 在运行 gulp的时候提示报了一个这个错误，之前运行还是可以的不知道为什么就这样了，一直没找到问题所在目录结构： ![图片说明](https://img-ask.csdn.net/upload/201711/01/1509512492_105582.png) 我的配置代码： var gulp = require('gulp'); var autoprefixer = require('gulp-autoprefixer'); var cleanCSS = require('gulp-clean-css'); var less = require('gulp-less'); var sourcemaps = require('gulp-sourcemaps'); var browserSync = require('browser-sync').create(),//编辑JS、HTML、Css实现无刷新页面操作 reload = browserSync.reload; function handleError(err) { console.log(err.toString()); this.emit('end'); } //执行 gulp.task("less", function () { return gulp.src(['LessDir/*.less']) //less文件的地址 src-->less下**:任意目录 *:任意文件名 // return gulp.src(['LessDir/*.less', '!LessDir/{finishS,happy,hks_common,index,money,photo,returnY,tabPhoto,yuyue}.less']) .pipe(sourcemaps.init()) .pipe(less()).on('error', handleError) .pipe(autoprefixer({ browsers: ['last 5 versions'], cascade: true })) .pipe(sourcemaps.write()) // .pipe(cleanCSS()) .pipe(gulp.dest('css')) //css输出目录位置 .pipe(reload({stream: true}));//这个结合了 Browsersync 来使用 }); gulp.task('js', function(){//需要在Watchjs下添加jS文件自动便已到指定的dest下去 return gulp.src('Watchjs/**/*.js') // .pipe(minify()) .pipe(gulp.dest("js")) .pipe(reload({stream: true}));//这个结合了 Browsersync 来使用 }); //根据less 样式编译后自动的执行watch 无须手动执行 gulp.task('watch',function(){ var watcher = gulp.watch(['LessDir/*.less'],['less']);//当所有less文件发生改变时，调用Less任务 watcher.on('change',function(event){ console.log('File ' + event.path + ' was ' + event.type + ', running tasks...'); }) }); // 静态服务器 gulp.task('browser-sync', function() { browserSync.init({ server: {//这个目录是相对于当前的gulpfile.js当前目录 baseDir: "./" } }); }); // 静态服务器 + 监听 scss/html 文件 gulp.task('serve', ['less'], function() { browserSync.init({ // port: '8888', // ui: false, server: "./" }); gulp.watch(['LessDir/*.less'], ['less']); // gulp.watch(['Watchjs/**/*.js'], ['js']); gulp.watch("./*.html").on('change', reload); }); gulp.task('default', ['less','watch','serve']);//执行(default)执行的是 Browser-sync ``` ```

2个项目中遇到的问题（静态URL，大量图片存储）: 问题一： jsp 怎么生成静态url，效果同javaeye 的url：http://www.iteye.com/topic/215508 或者同sina的url：http://news.sina.com.cn/c/2008-08-30/080916200778.shtml 我不知道jsp处理这样的方式方法有多少种，不过我想了解最实用，能提高性能的那种。我的理解（网上一个描述很符合我表达的意思）：在访问量大的门户站点，数据库如何可以承受呢。这时，静态页面就显出了无可比拟的优势，每一次访问都不需要经过数据库，服务器压力有了数量级级别上的减少。这就是门户站点用html或者shtml文件格式的原因。JSP中文网新闻发布系统的所有新闻页面都会自动生成html或shtml格式，且在页面上将该新闻的访问次数等信息还能动态显示（当然，并不是每次访问都重新生成文件）问题二：我的项目以后将有很多上传来的图片，每天都有很多，长时间下来可能有几十G，现在我的解决方法是：在当前项目下指定上传主目录-->年度时间创建目录--->月目录--<图片文件>,我根据时间段创建目录，然后在数据库里面保存我的图片url地址，下次作为现实的读取，现在这样设计的问题就是我以后有更多的图片存储到我的项目里面，占用项目所在磁盘的大量空间，我应该怎么解决以后不断扩展的目录。。让我的磁盘均分我的使用负荷？还请各位帮忙，本人刚刚开始写web项目没多久，谢谢。。

spring mvc+shiro+cas 实现cas client功能跳转回来404: http://securitycenter.com:8080/gtsys/cas?ticket=ST-14-HEDhc1GVQt0UYdiZpi7R-cas 返回这个地址 404 ![图片说明](https://img-ask.csdn.net/upload/201510/09/1444404164_27274.png) ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd" >  <task:annotation-driven />   <bean id="exceptionHandler" class="com.lanyuan.exception.MyExceptionHandler"/>  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" > <property name ="locations"> <list> <value>classpath:jdbc.properties</value> </list> </property> <property name="ignoreUnresolvablePlaceholders" value="true" /> </bean> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="driverClassName" value="${jdbc.driverClass}" /> </bean> <bean id="pagePlugin" class="com.lanyuan.plugin.PagePlugin"> <property name="properties"> <props> <prop key="dialect">mysql</prop> <prop key="pageSqlId">.*query.*</prop> </props> </property> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" />  <property name="mapperLocations" value="classpath:mappings/*-mapper.xml"/> <property name="typeAliasesPackage" value="com.lanyuan.entity"/> <property name="plugins"> <array> <ref bean="pagePlugin" /> </array> </property> </bean>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.lanyuan.mapper" /> </bean>  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>    <context:component-scan base-package="com.lanyuan.task" />  <context:annotation-config /> </beans> spring-application.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd" > <tx:annotation-driven /> <context:component-scan base-package="com.lanyuan.controller" /> <context:component-scan base-package="com.lanyuan.logAop" />   <aop:aspectj-autoproxy proxy-target-class="true"/>  <context:annotation-config/>  <bean id="mappingJackson2HttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>text/json;charset=UTF-8</value> <value>application/json;charset=UTF-8</value> </list> </property> </bean>  <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJackson2HttpMessageConverter" />  </list> </property> </bean>  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:annotation-driven>  <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="objectMapper"> <bean class="com.fasterxml.jackson.databind.ObjectMapper"> <property name="dateFormat"> <bean class="java.text.SimpleDateFormat"> <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" /> </bean> </property> </bean> </property> </bean> </mvc:message-converters> </mvc:annotation-driven>  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  <property name="defaultEncoding" value="utf-8" />  <property name="maxUploadSize" value="10485760000" />  <property name="maxInMemorySize" value="40960" /> </bean> <import resource="spring-mvc-shiro.xml"/> </beans> spring-mvc.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd" > <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" > <property name ="locations"> <list> <value>classpath:jdbc.properties</value> </list> </property> <property name="ignoreUnresolvablePlaceholders" value="true" /> </bean> <bean id="credentialsMatcher" class="com.lanyuan.shiro.credentials.RetryLimitHashedCredentialsMatcher">  <constructor-arg ref="cacheManager" /> <property name="hashAlgorithmName" value="md5" />   </bean>  <bean id="sessionIdCookie" class="org.apache.shiro.web.servlet.SimpleCookie">  <constructor-arg value="sid"/> <property name="httpOnly" value="true"/> <property name="maxAge" value="-1"/> </bean> <bean id="rememberMeCookie" class="org.apache.shiro.web.servlet.SimpleCookie"> <constructor-arg value="rememberMe"/> <property name="httpOnly" value="true"/> <property name="maxAge" value="2592000"/> </bean>  <bean id="rememberMeManager" class="org.apache.shiro.web.mgt.CookieRememberMeManager">  <property name="cipherKey" value="#{T(org.apache.shiro.codec.Base64).decode('4AvVhmFLUs0KTA3Kprsdag==')}"/> <property name="cookie" ref="rememberMeCookie"/> </bean> <bean id="casSubjectFactory" class="org.apache.shiro.cas.CasSubjectFactory"/>  <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"> <property name="realm" ref="casRealm" /> <property name="sessionManager" ref="sessionManager"/>  <property name="cacheManager" ref="cacheManager" /> <property name="rememberMeManager" ref="rememberMeManager"/> <property name="subjectFactory" ref="casSubjectFactory"/> </bean>  <bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean"> <property name="staticMethod" value="org.apache.shiro.SecurityUtils.setSecurityManager"/> <property name="arguments" ref="securityManager"/> </bean>          <bean id="casRealm" class="com.lanyuan.shiro.MyCasRealm"> <property name="cachingEnabled" value="true"/> <property name="authenticationCachingEnabled" value="true"/> <property name="authenticationCacheName" value="authenticationCache"/> <property name="authorizationCachingEnabled" value="true"/> <property name="authorizationCacheName" value="authorizationCache"/>  <property name="casServerUrlPrefix" value="${shiro.casServer.url}"/>  <property name="casService" value="${shiro.client.cas}"/> </bean> <bean id="sysUserFilter" class="com.lanyuan.shiro.filter.SysUserFilter"/> <bean id="kickoutSessionControlFilter" class="com.lanyuan.shiro.filter.KickoutSessionControlFilter"> <property name="cacheManager" ref="cacheManager"/> <property name="sessionManager" ref="sessionManager"/> <property name="kickoutAfter" value="false"/> <property name="maxSession" value="1"/> <property name="kickoutUrl" value="/login.shtml"/> </bean> <bean id="casFilter" class="org.apache.shiro.cas.CasFilter">  <property name="failureUrl" value="${shiro.failureUrl}"/> </bean> <bean id="casLogoutFilter" class="io.github.howiefh.cas.session.CasLogoutFilter"> <property name="sessionManager" ref="sessionManager"/> </bean> <bean id="logoutFilter" class="org.apache.shiro.web.filter.authc.LogoutFilter"> <property name="redirectUrl" value="${shiro.logout.url}"/> </bean>  <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean"> <property name="securityManager" ref="securityManager" />  <property name="loginUrl" value="${shiro.login.url}"/> <property name="successUrl" value="${shiro.login.success.url}"/> <property name="unauthorizedUrl" value="/denied.jsp" />  <property name="filterChainDefinitionMap" ref="chainDefinitionSectionMetaSource" /> <property name="filters"> <util:map> <entry key="cas" value-ref="casFilter"/> <entry key="logout" value-ref="logoutFilter" /> <entry key="casLogout" value-ref="casLogoutFilter" /> <entry key="sysUser" value-ref="sysUserFilter"/> <entry key="kickout" value-ref="kickoutSessionControlFilter"/> </util:map> </property> </bean>  <bean id="chainDefinitionSectionMetaSource" class="com.lanyuan.shiro.ChainDefinitionSectionMetaSource"> <property name="filterChainDefinitions"> <value> /casFailure.jsp = anon /cas = casLogout,cas /logout = logout /favicon.ico = anon /admin_files/** = anon /fonts/** = anon /404/** = anon /error.jsp = anon /js/** = anon /layer-v1.9.2/** = anon /notebook/** = anon /login.shtml = anon /denied.jsp = anon /install.shtml = anon /lanyuan.shtml = anon /** = casLogout,user </value> </property> </bean> <bean id="sessionIdGenerator" class="org.apache.shiro.session.mgt.eis.JavaUuidSessionIdGenerator"/>  <bean id="sessionDAO" class="org.apache.shiro.session.mgt.eis.EnterpriseCacheSessionDAO"> <property name="activeSessionsCacheName" value="shiro-activeSessionCache"/> <property name="sessionIdGenerator" ref="sessionIdGenerator"/> </bean>   <bean id="sessionValidationScheduler" class="org.apache.shiro.session.mgt.quartz.QuartzSessionValidationScheduler"> <property name="sessionValidationInterval" value="1800000"/> <property name="sessionManager" ref="sessionManager"/> </bean>   <bean id="sessionManager" class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager"> <property name="globalSessionTimeout" value="1800000"/> <property name="deleteInvalidSessions" value="true"/> <property name="sessionValidationSchedulerEnabled" value="true"/> <property name="sessionValidationScheduler" ref="sessionValidationScheduler"/> <property name="sessionDAO" ref="sessionDAO"/> <property name="sessionIdCookieEnabled" value="true"/> <property name="sessionIdCookie" ref="sessionIdCookie"/> </bean>  <bean id="cacheManager" class="com.lanyuan.shiro.spring.SpringCacheManagerWrapper" > <property name="cacheManager" ref="springCacheManager"/> </bean> <bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"> <property name="cacheManager" ref="ehcacheManager"/> </bean>  <bean id="ehcacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:ehcache.xml"/> </bean> <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" /> </beans> spring-shiro.xml <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0" metadata-complete="false"> <display-name>gtsys</display-name>   <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-shiro.xml,classpath:spring-application.xml</param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <listener> <listener-class> org.springframework.web.context.request.RequestContextListener </listener-class> </listener> <filter> <filter-name>shiroFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> <async-supported>true</async-supported> <init-param> <param-name>targetFilterLifecycle</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>shiroFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.shtml</url-pattern> </servlet-mapping> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <servlet-mapping> <servlet-name>jsp</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.eot</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.ttf</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.xml</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.swf</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.zip</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.gif</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.woff</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>login.shtml</welcome-file> </welcome-file-list> </web-app> web.xml ## shiro shiro.session.timeout=1800000 shiro.session.validate.timespan=1800000 # cas\u767B\u5F55URL shiro.login.url=https://localhost:8443/cas-server/login?service=http://securitycenter.com:8080/gtsys/cas # cas logout shiro.logout.url=https://localhost:8443/cas-server/logout?service=http://securitycenter.com:8080/gtsys # cas\u767B\u5F55\u6210\u529F\u8DF3\u8F6CURL shiro.login.success.url=http://securitycenter.com:8080/gtsys/index.shtml # cas\u670D\u52A1\u5668URL shiro.casServer.url=https://localhost:8443/cas-server # \u5BA2\u6237\u7AEFCAS\u767B\u5F55URL shiro.client.cas=http://securitycenter.com:8080/gtsys/cas # \u5BA2\u6237\u7AEFCAS\u9A8C\u8BC1\u5931\u8D25\u8DF3\u8F6CURL shiro.failureUrl=/casFailure.jsp ## dataSource dataSource.driver=com.mysql.jdbc.Driver dataSource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8 dataSource.username=root dataSource.password=1234 properties文件 <?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true" monitoring="autodetect" dynamicConfig="true"> <diskStore path="java.io.tmpdir"/>   <cache name="cache" maxEntriesLocalHeap="10000" maxEntriesLocalDisk="1000" eternal="true" diskSpoolBufferSizeMB="20" timeToIdleSeconds="0" timeToLiveSeconds="0" memoryStoreEvictionPolicy="LFU" transactionalMode="off"> </cache>  <cache name="passwordRetryCache" maxEntriesLocalHeap="2000" eternal="false" timeToIdleSeconds="600" timeToLiveSeconds="0" overflowToDisk="false" statistics="true"> </cache>  <cache name="shiro-activeSessionCache" maxEntriesLocalHeap="2000" eternal="false" timeToIdleSeconds="3600" timeToLiveSeconds="0" overflowToDisk="false" statistics="true"> </cache> <cache name="shiro-kickout-session" maxEntriesLocalHeap="2000" eternal="false" timeToIdleSeconds="3600" timeToLiveSeconds="0" overflowToDisk="false" statistics="true"> </cache> </ehcache> ehcache.xml package com.lanyuan.shiro; //import com.github.zhangkaitao.shiro.chapter15.service.UserService; import java.util.List; import javax.inject.Inject; import org.apache.shiro.SecurityUtils; import org.apache.shiro.authz.AuthorizationInfo; import org.apache.shiro.authz.SimpleAuthorizationInfo; import org.apache.shiro.cas.CasRealm; import org.apache.shiro.subject.PrincipalCollection; import com.lanyuan.entity.ResFormMap; import com.lanyuan.mapper.ResourcesMapper; import com.lanyuan.mapper.UserMapper; /** * <p>User: Zhang Kaitao * <p>Date: 14-2-13 * <p>Version: 1.0 */ public class MyCasRealm extends CasRealm { // private UserService userService; // // public void setUserService(UserService userService) { // this.userService = userService; // } @Inject private ResourcesMapper resourcesMapper; @Inject private UserMapper userMapper; @Override protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) { String username = (String)principals.getPrimaryPrincipal(); // PathMatchingFilterChainResolver SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo(); //authorizationInfo.setRoles(userService.findRoles(username)); // authorizationInfo.setStringPermissions(userService.findPermissions(username)); String userId = SecurityUtils.getSubject().getSession().getAttribute("userSessionId").toString(); List<ResFormMap> rs = resourcesMapper.findUserResourcess(userId); for (ResFormMap resources : rs) { authorizationInfo.addStringPermission(resources.get("resKey").toString()); } return authorizationInfo; } } MyCasRealm.java ``` ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <aop:config proxy-target-class="true"></aop:config> <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor"> <property name="securityManager" ref="securityManager"/> </bean> </beans> spring-mvc-shiro.xml ``` 这个是更改网上的蓝缘系统的 cas server 和cas client参考的 http://howiefh.github.io/2015/05/19/shiro-cas-single-sign-on/?utm_source=tuicool 不知道为什么会返回404

There is no Action mapped for namespace: 使用的是J2EE+SHH框架，具体代码如下： --- **struts.xml** ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.custom.i18n.resources" value="message" /> <constant name="struts.i18n.encoding" value="UTF-8" />  <constant name="struts.objectFactory" value="spring" />    <constant name="struts.configuration.xml.reload" value="false" /> </struts> ``` --- **applicationContext.xml** ``` **<?xml version="1.0" encoding="UTF-8"?> ** <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd" default-autowire="byName">  <context:component-scan base-package="com.cheer.bookshop" />  <task:annotation-driven /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <description>配置数据源</description> <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="url" value="jdbc:mysql://localhost:3306/bookstore?useUnicode=true&characterEncoding=UTF-8"></property> <property name="username" value="root"></property> <property name="password" value="123456"></property>  <property name="initialSize" value="1"/>  <property name="maxActive" value="100"/>  <property name="maxIdle" value="-1"/>  <property name="minIdle" value="0"/>  <property name="maxWait" value="10000"/> </bean>  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <description>将数据源注入到sessionFactory,使用注解方式</description> <property name="dataSource" ref="dataSource"></property>  <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.current_session_context_class">thread</prop> <prop key="hibernate.connection.release_mode">after_transaction</prop> </props> </property>  <property name="packagesToScan"> <list> <value>com.cheer.bookshop.Model</value> </list> </property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <description> 增加事务管理</description> <property name="sessionFactory" ref="sessionFactory" /> </bean>  <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> </tx:attributes> </tx:advice>  <aop:config proxy-target-class="true"> <aop:pointcut id="allManagerMethod" expression="execution (* com.cheer.bookshop.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="allManagerMethod" /> </aop:config> </beans> ``` --- **JSP页面登陆Form表单** ``` <s:form action="userlogin.action" method="post"> <p><font color="red">   ${msg}</font></p> <div class="form_row"> <label class="contact"><strong>Username:</strong></label> <input type="text" class="contact_input" name="user.username" value="${user.username}"/> </div> <div class="form_row"> <label class="contact"><strong>Password:</strong></label> <input type="password" class="contact_input" name="user.password" value="${user.password}"/> </div> <div class="form_row"> <div class="terms"> <input type="checkbox" name="terms" /> Remember me </div> </div> <div class="form_row"> <input type="submit" class="register" value="login" /> </div> </s:form> ``` --- **Action类** ``` package com.cheer.bookshop.action; import java.io.IOException; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import org.apache.struts2.convention.annotation.Action; import org.apache.struts2.convention.annotation.Namespace; import org.apache.struts2.convention.annotation.Result; import com.cheer.bookshop.Model.User; import com.cheer.bookshop.service.impl.UserServiceImpl; import com.opensymphony.xwork2.ActionSupport; @Namespace("/") public class UserAction extends ActionSupport { @Resource private UserServiceImpl userServiceImpl; private User user; private String msg; //用户登录 @Action(value = "userlogin", results = {@Result(name = "success", location = "/index.jsp"), @Result(name = "input", location = "/jsp/user/myaccount.jsp", type = "redirect") }) public String login(){ User userdb = userServiceImpl.login(user.getUsername()); if(userdb != null){ String password = user.getPassword(); if(password.equals(userdb.getPassword())){ user=userdb; return SUCCESS; }else{ msg="密码错误，请重新输入！"; return INPUT; } }else{ msg="用户名不存在，请注册！"; return INPUT; } } //用户注册 @Action(value = "userregister", results = {@Result(name = "success", location = "/jsp/user/myaccount.jsp", type = "redirect") }) public String register(){ userServiceImpl.register(user); return SUCCESS; } //验证用户名是否已经被使用 @Action(value = "validateUsername") public String validateUsername() throws IOException{ HttpServletRequest request = ServletActionContext.getRequest(); HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8"); String username = request.getParameter("username"); boolean flag = userServiceImpl.validateUsername(username); if(flag){ response.getWriter().println("<p><font color='red'>用户名已经存在</font></p>"); }else{ response.getWriter().println("<p><font color='green'>用户名可以使用</font></p>"); } return NONE; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } } ``` --- 如上，Action有配置userlogin,登陆页form表单提交路径也是一样，单就是无法调整至aciton里，eclipse也没有报错，该如何解决？ There is no Action mapped for namespace / and action name userlogin.

java web 项目问题，请大神帮帮忙: # 首次使用idea从svn当下elicpse项目导入，配置完成运行出现这样的错误。 HTTP Status 500 - Filter execution threw an exception type Exception report message Filter execution threw an exception description The server encountered an internal error that prevented it from fulfilling this request. exception javax.servlet.ServletException: Filter execution threw an exception com.rongyi.common.XssFilter.doFilter(XssFilter.java:23) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) root cause java.lang.ExceptionInInitializerError com.rongyi.filter.CheckSessionOutFilter.doFilter(CheckSessionOutFilter.java:42) com.rongyi.common.XssFilter.doFilter(XssFilter.java:23) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) root cause java.lang.StringIndexOutOfBoundsException: String index out of range: -1 java.lang.String.substring(String.java:1967) com.rongyi.common.utils.Constant.getpath(Constant.java:82) com.rongyi.common.utils.Constant.<clinit>(Constant.java:69) com.rongyi.filter.CheckSessionOutFilter.doFilter(CheckSessionOutFilter.java:42) com.rongyi.common.XssFilter.doFilter(XssFilter.java:23) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) note The full stack trace of the root cause is available in the Apache Tomcat/9.0.0.M9 logs. Apache Tomcat/9.0.0.M9 # web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name></display-name>  <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param>  <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <context-param> <param-name>spring.profiles.active</param-name> <param-value>production</param-value> </context-param> <servlet> <servlet-name>Dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param>  <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping>  <servlet-name>Dispatcher</servlet-name>  <url-pattern>/</url-pattern> </servlet-mapping>  <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <filter> <filter-name>XssFilter</filter-name> <filter-class>com.rongyi.common.XssFilter</filter-class> </filter> <filter-mapping> <filter-name>XssFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <filter> <filter-name>CheckSessionFilter</filter-name> <filter-class> com.rongyi.filter.CheckSessionOutFilter </filter-class> </filter> <filter-mapping> <filter-name>CheckSessionFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> 请帮帮忙跪求。。。

DispatcherServlet noHandlerFound: web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:spring/applicationContext-*.xml</param-value> </context-param> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:spring/springmvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <session-config> <session-timeout>30</session-timeout> </session-config> <welcome-file-list> <welcome-file>index</welcome-file> </welcome-file-list> <error-page> <error-code>403</error-code> <location>/error/403.html</location> </error-page> <error-page> <error-code>404</error-code> <location>/error/404.html</location> </error-page> <error-page> <error-code>500</error-code> <location>/error/500.html</location> </error-page> </web-app> springmvc-servlet.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd" default-autowire="byName" default-lazy-init="false">  <mvc:resources location="/js/" mapping="/js/**/*"/> <mvc:resources location="/css/" mapping="/css/**/*"/> <mvc:resources location="/image/" mapping="/image/**/*"/> <mvc:resources location="/error/" mapping="/error/**/*"/> <mvc:resources location="/upload/" mapping="/upload/**/*"/> <mvc:resources location="/widgets/" mapping="/widgets/**/*"/> <mvc:resources location="/robots.txt" mapping="/robots.txt"/> <mvc:resources location="/favicon.ico" mapping="/favicon.ico"/>  <context:component-scan base-package="java" use-default-filters="false"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <bean class="org.springframework.web.servlet.mvc.annotation.annotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=UTF-8</value> </list> </property> </bean> </list> </property> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> <bean id="freemarkerConfiguration" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="location" value="classpath:config/ftl.properties"/> </bean> <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> <property name="templateLoaderPath" value="/WEB-INF/ftl/" /> <property name="freemarkerSettings" ref="freemarkerConfiguration"/> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver"> <property name="order" value="1"/> <property name="prefix" value=""/> <property name="suffix" value=".ftl"/> <property name="contentType" value="text/html;charset=utf-8"/> <property name="cache" value="true" /> <property name="exposeSpringMacroHelpers" value="true" /> <property name="requestContextAttribute" value="request" /> <property name="exposeRequestAttributes" value="true" /> <property name="exposeSessionAttributes" value="true" /> <property name="viewClass"> <value>org.springframework.web.servlet.view.freemarker.FreeMarkerView</value> </property> </bean> <bean id="jasperResolver" class="org.springframework.web.servlet.view.jasperreports.JasperReportsViewResolver"> <property name="order" value="2" /> <property name="prefix" value="/WEB-INF/jasper/" /> <property name="suffix" value=".jasper" /> <property name="viewClass" value="org.springframework.web.servlet.view.jasperreports.JasperReportsMultiFormatView" /> <property name="exporterParameters"> <map> <entry key="net.sf.jasperreports.engine.JRExporterParameter.CHARACTER_ENCODING"> <value>utf-8</value> </entry> </map> </property> <property name="headers"> <props> <prop key="Content-Disposition">attachment;</prop> </props> </property> </bean> <bean class="org.springframework.web.servlet.view.XmlViewResolver" p:location="/WEB-INF/jasper/jasper-views.xml" p:order="0" ></bean> </beans> console: 信息: Server startup in 4949 ms 六月 07, 2017 11:43:24 上午 org.springframework.web.servlet.DispatcherServlet noHandlerFound 警告: No mapping found for HTTP request with URI [/Erp/] in DispatcherServlet with name 'springmvc' 六月 07, 2017 11:43:24 上午 org.springframework.web.servlet.DispatcherServlet noHandlerFound 警告: No mapping found for HTTP request with URI [/Erp/error/404.html] in DispatcherServlet with name 'springmvc'![![图片说明](https://img-ask.csdn.net/upload/201706/07/1496807975_868152.png)图片说明](https://img-ask.csdn.net/upload/201706/07/1496807962_123345.png)

Java学习的正确打开方式: 在博主认为，对于入门级学习java的最佳学习方法莫过于视频+博客+书籍+总结，前三者博主将淋漓尽致地挥毫于这篇博客文章中，至于总结在于个人，实际上越到后面你会发现学习的最好方式就是阅读参考官方文档其次就是国内的书籍，博客次之，这又是一个层次了，这里暂时不提后面再谈。博主将为各位入门java保驾护航，各位只管冲鸭！！！上天是公平的，只要不辜负时间，时间自然不会辜负你。何谓学习？博主所理解的学习，它是一个过程，是一个不断累积、不断沉淀、不断总结、善于传达自己的个人见解以及乐于分享的过程。

程序员必须掌握的核心算法有哪些？: 由于我之前一直强调数据结构以及算法学习的重要性，所以就有一些读者经常问我，数据结构与算法应该要学习到哪个程度呢？，说实话，这个问题我不知道要怎么回答你，主要取决于你想学习到哪些程度，不过针对这个问题，我稍微总结一下我学过的算法知识点，以及我觉得值得学习的算法。这些算法与数据结构的学习大多数是零散的，并没有一本把他们全部覆盖的书籍。下面是我觉得值得学习的一些算法以及数据结构，当然，我也会整理一些看过...

大学四年自学走来，这些私藏的实用工具/学习网站我贡献出来了: 大学四年，看课本是不可能一直看课本的了，对于学习，特别是自学，善于搜索网上的一些资源来辅助，还是非常有必要的，下面我就把这几年私藏的各种资源，网站贡献出来给你们。主要有：电子书搜索、实用工具、在线视频学习网站、非视频学习网站、软件下载、面试/求职必备网站。注意：文中提到的所有资源，文末我都给你整理好了，你们只管拿去，如果觉得不错，转发、分享就是最大的支持了。一、电子书搜索对于大部分程序员...

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程序员接私活怎样防止做完了不给钱？: 首先跟大家说明一点，我们做 IT 类的外包开发，是非标品开发，所以很有可能在开发过程中会有这样那样的需求修改，而这种需求修改很容易造成扯皮，进而影响到费用支付，甚至出现做完了项目收不到钱的情况。那么，怎么保证自己的薪酬安全呢？我们在开工前，一定要做好一些证据方面的准备（也就是“讨薪”的理论依据），这其中最重要的就是需求文档和验收标准。一定要让需求方提供这两个文档资料作为开发的基础。之后开发...

网页实现一个简单的音乐播放器（大佬别看。(⊙﹏⊙)）: 今天闲着无事，就想写点东西。然后听了下歌，就打算写个播放器。于是乎用h5 audio的加上js简单的播放器完工了。演示地点演示 html代码如下` music 这个年纪七月的风音乐 ` 然后就是css`*{ margin: 0; padding: 0; text-decoration: none; list-...

Python十大装B语法: Python 是一种代表简单思想的语言，其语法相对简单，很容易上手。不过，如果就此小视 Python 语法的精妙和深邃，那就大错特错了。本文精心筛选了最能展现 Python 语法之精妙的十个知识点，并附上详细的实例代码。如能在实战中融会贯通、灵活使用，必将使代码更为精炼、高效，同时也会极大提升代码B格，使之看上去更老练，读起来更优雅。

数据库优化 - SQL优化: 以实际SQL入手，带你一步一步走上SQL优化之路！

2019年11月中国大陆编程语言排行榜: 2019年11月2日，我统计了某招聘网站，获得有效程序员招聘数据9万条。针对招聘信息，提取编程语言关键字，并统计如下：编程语言比例 rank pl_ percentage 1 java 33.62% 2 cpp 16.42% 3 c_sharp 12.82% 4 javascript 12.31% 5 python 7.93% 6 go 7.25% 7 p...

通俗易懂地给女朋友讲：线程池的内部原理: 餐盘在灯光的照耀下格外晶莹洁白，女朋友拿起红酒杯轻轻地抿了一小口，对我说：“经常听你说线程池，到底线程池到底是个什么原理？”

《奇巧淫技》系列-python！！每天早上八点自动发送天气预报邮件到QQ邮箱: 将代码部署服务器，每日早上定时获取到天气数据，并发送到邮箱。也可以说是一个小型人工智障。知识可以运用在不同地方，不一定非是天气预报。

经典算法（5）杨辉三角: 杨辉三角是经典算法，这篇博客对它的算法思想进行了讲解，并有完整的代码实现。

英特尔不为人知的 B 面: 从 PC 时代至今，众人只知在 CPU、GPU、XPU、制程、工艺等战场中，英特尔在与同行硬件芯片制造商们的竞争中杀出重围，且在不断的成长进化中，成为全球知名的半导体公司。殊不知，在「刚硬」的背后，英特尔「柔性」的软件早已经做到了全方位的支持与支撑，并持续发挥独特的生态价值，推动产业合作共赢。而对于这一不知人知的 B 面，很多人将其称之为英特尔隐形的翅膀，虽低调，但是影响力却不容小觑。那么，在...

腾讯算法面试题：64匹马8个跑道需要多少轮才能选出最快的四匹？: 昨天，有网友私信我，说去阿里面试，彻底的被打击到了。问了为什么网上大量使用ThreadLocal的源码都会加上private static？他被难住了，因为他从来都没有考虑过这个问题。无独有偶，今天笔者又发现有网友吐槽了一道腾讯的面试题，我们一起来看看。腾讯算法面试题：64匹马8个跑道需要多少轮才能选出最快的四匹？在互联网职场论坛，一名程序员发帖求助到。二面腾讯，其中一个算法题：64匹...

面试官：你连RESTful都不知道我怎么敢要你？: 干货，2019 RESTful最贱实践

刷了几千道算法题，这些我私藏的刷题网站都在这里了！: 遥想当年，机缘巧合入了 ACM 的坑，周边巨擘林立，从此过上了"天天被虐似死狗"的生活… 然而我是谁，我可是死狗中的战斗鸡，智力不够那刷题来凑，开始了夜以继日哼哧哼哧刷题的日子，从此"读题与提交齐飞， AC 与 WA 一色 "，我惊喜的发现被题虐既刺激又有快感，那一刻我泪流满面。这么好的事儿作为一个正直的人绝不能自己独享，经过激烈的颅内斗争，我决定把我私藏的十几个 T 的，阿不，十几个刷题网...

为啥国人偏爱Mybatis，而老外喜欢Hibernate/JPA呢？: 关于SQL和ORM的争论，永远都不会终止，我也一直在思考这个问题。昨天又跟群里的小伙伴进行了一番讨论，感触还是有一些，于是就有了今天这篇文。声明：本文不会下关于Mybatis和JPA两个持久层框架哪个更好这样的结论。只是摆事实，讲道理，所以，请各位看官勿喷。一、事件起因关于Mybatis和JPA孰优孰劣的问题，争论已经很多年了。一直也没有结论，毕竟每个人的喜好和习惯是大不相同的。我也看...

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SQL-小白最佳入门sql查询一: 不要偷偷的查询我的个人资料，即使你再喜欢我，也不要这样，真的不好；

项目中的if else太多了，该怎么重构？: 介绍最近跟着公司的大佬开发了一款IM系统，类似QQ和微信哈，就是聊天软件。我们有一部分业务逻辑是这样的 if (msgType = "文本") { // dosomething } else if(msgType = "图片") { // doshomething } else if(msgType = "视频") { // doshomething } else { // doshom...

Nginx 原理和架构: Nginx 是一个免费的，开源的，高性能的 HTTP 服务器和反向代理，以及 IMAP / POP3 代理服务器。Nginx 以其高性能，稳定性，丰富的功能，简单的配置和低资源消耗而闻名。 Nginx 的整体架构 Nginx 里有一个 master 进程和多个 worker 进程。master 进程并不处理网络请求，主要负责调度工作进程：加载配置、启动工作进程及非停升级。worker 进程负责处...

【图解经典算法题】如何用一行代码解决约瑟夫环问题: 约瑟夫环问题算是很经典的题了，估计大家都听说过，然后我就在一次笔试中遇到了，下面我就用 3 种方法来详细讲解一下这道题，最后一种方法学了之后保证让你可以让你装逼。问题描述：编号为 1-N 的 N 个士兵围坐在一起形成一个圆圈，从编号为 1 的士兵开始依次报数（1，2，3…这样依次报），数到 m 的士兵会被杀死出列，之后的士兵再从 1 开始报数。直到最后剩下一士兵，求这个士兵的编号。 1、方...

吐血推荐珍藏的Visual Studio Code插件: 作为一名Java工程师，由于工作需要，最近一个月一直在写NodeJS，这种经历可以说是一部辛酸史了。好在有神器Visual Studio Code陪伴，让我的这段经历没有更加困难。眼看这段经历要告一段落了，今天就来给大家分享一下我常用的一些VSC的插件。 VSC的插件安装方法很简单，只需要点击左侧最下方的插件栏选项，然后就可以搜索你想要的插件了。下面我们进入正题 Material Theme ...

如何防止抄袭PCB电路板: 目录 1、抄板是什么 2、抄板是否属于侵权 3、如何防止抄板 1、抄板是什么抄板也叫克隆或仿制，是对设计出来的PCB板进行反向技术研究；目前全新的定义：从狭义上来说，抄板仅指对电子产品电路板PCB文件的提取还原和利用文件进行电路板克隆的过程；从广义上来说，抄板不仅包括对电路板文件提取、电路板克隆、电路板仿制等技术过程，而且包括对电路板文件进行修改（即改板）、对电子产品外形模具进行三维...

“狗屁不通文章生成器”登顶GitHub热榜，分分钟写出万字形式主义大作: 一、垃圾文字生成器介绍最近在浏览GitHub的时候，发现了这样一个骨骼清奇的雷人项目，而且热度还特别高。项目中文名：狗屁不通文章生成器项目英文名：BullshitGenerator 根据作者的介绍，他是偶尔需要一些中文文字用于GUI开发时测试文本渲染，因此开发了这个废话生成器。但由于生成的废话实在是太过富于哲理，所以最近已经被小伙伴们给玩坏了。他的文风可能是这样的：你发现，...

程序员：我终于知道post和get的区别: 是一个老生常谈的话题，然而随着不断的学习，对于以前的认识有很多误区，所以还是需要不断地总结的，学而时习之，不亦说乎

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加快推动区块链技术和产业创新发展，2019可信区块链峰会在京召开: 11月8日，由中国信息通信研究院、中国通信标准化协会、中国互联网协会、可信区块链推进计划联合主办，科技行者协办的2019可信区块链峰会将在北京悠唐皇冠假日酒店开幕。　　区块链技术被认为是继蒸汽机、电力、互联网之后，下一代颠覆性的核心技术。如果说蒸汽机释放了人类的生产力，电力解决了人类基本的生活需求，互联网彻底改变了信息传递的方式，区块链作为构造信任的技术有重要的价值。　　1...