idea :This application has no explicit mapping for /error, so you are seeing this as a fallback.

新建Spring Boot项目报错,具体解决步奏,请帮忙解答一下,谢谢!
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2个回答

自己解决了。
首先呢,项目名称别有大写字母
主程入口的包名如:com.zhop,别写成com.zhop.demo这样的。
具体参考:https://www.cnblogs.com/zmfx/p/8903688.html

页面状态是404,可能是你用的@RequestMapping中地址不对。如果你用的SpringBoot中,application.properties(application.yml)中配置的前缀后缀不一样吧
我也是这种404,我是因为用的是jsp,把jsp准换为html就好

AdminPwd
Hello Bug 回复大帅国: 你也是用的SpringBoot?我看你上面已经解决
6 个月之前 回复
qq_43251032
大帅国 您好!我这里输入http://localhost8080,也是报404错的。
6 个月之前 回复
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抄袭、复制答案,以达到刷声望分或其他目的的行为,在CSDN问答是严格禁止的,一经发现立刻封号。是时候展现真正的技术了!
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本帖要说的是在《c专家编程》一个程序里的bug(至于这个是不是就看下大家的看法,不过我觉得挺明显的,要不就是我班门弄斧了,哈哈),还有就是想给大家看下这段程序,这是一个关于解析c语言声明的程序。没放假前的一段时间,我在论坛里看到了不少人在讨论这个声明的问题,lz也给出了分析声明的方法,至于要不要用那些复杂的声明我就不发表意见了(因为我也没有什么经验),但我们总得看明白这些声明啊。我在那个时候刚把《c专家编程》这书看完了,相信看过这书的同学都知道,书里就有一章是关于声明的,里面还有两个用来解析声明的程序(另一个是在后面的章节用有限状态机实现的)。rn 其实要理解声明只要知道一些在声明里的优先级就行,饿...就不扯这个了,进入正题。这里准备说的程序是那个用有限状态机实现的那个(其实这个bug在第一个解析声明的程序也有,不过我觉得这个好玩些,也可以给一些不知道FSM的同学介绍一下这个概念)。rn 为了让大家都可以更好的理解这个程序,我先引用一下书里关于FSM(finite state machine)有限状态机的描述:有限状态机是一个数学概念,如果把它运用于程序中,可以发挥很大的作用。它是一种协议,用于有限数量的子程序(“状态”)的发展变化。每一个子程序进行一些处理并选择下一种状态(通常取决于下一段的输入)。有限状态机可以用于程序的控制结构。它的基本思路是用一张表保存所有可能的状态,并列出进入每个状态时可能执行的所有动作,其中最后一个动作就是计算(通常在当前状态和下一个输入字符的基础上,另外再经过一次表查询)下一个应该进入的状态。你从一个“初始状态”开始。在这过程中,翻译表可能会告诉你进入了一个错误的状态,表示一个预期之外的或错误的输入。你不停的在各种状态间进行转换,直到到达结束状态。rn 饿...扯了这么多,就想给不知道这个的人介绍一下这个概念。说回来,要用有限状态机实现,那就要有一个适合的状态机啊(当然书里都准备好了的),下面就给大家看一个神奇的玩意(好吧,我知道很多人都看过了,不过我还是要把它弄出来):rnrn[img=http://img.my.csdn.net/uploads/201207/19/1342657921_8467.png][/img]rn[img=http://img.my.csdn.net/uploads/201207/19/1342657936_1445.png][/img]rn由于图大的问题,就分成了两部分,希望大家谅解!rn 这是一个可以用来分析c语言声明的环,只要按照它的步骤来就可以解析声明,它的原理就是基于声明的优先级:1.括号里的部分 2.后缀符号[]或() 3.前缀符号* ,和三个规定:1.函数不可以返回函数 2.函数的参数不可以是函数 3.数组的类型不可以是函数 (可以用指针来实现)。rn再引用书里的一段描述:分析环是一个简单的状态机,它的绝大多数状态转换都是按连续的顺序进行的,与输入无关,这意味著不需要建立一个转换表用于匹配状态/输入以获得下一个状态。你可以用一个简单的变量(类型为函数指针)。在每种状态下,需要做的事情之一就是给下个一个状态赋值。在主循环中,程序将调用指针所指向的函数,并循环往复,直到结束函数被调用或遇到一个错误的状态。rn 好吧,终于把这些扯完了,我们可以这个分析环的步骤2,3,4,5看作是一种状态,6是结束状态。贴代码了,bug我在下面说。rn[code=C/C++]rn// 用//是本人的注释rnrn#include rn#include rn#include rn#define MAXTOKENS 100rn#define MAXTOKENLEN 64rnenum type_tag IDENTIFIER, QUALIFIER, TYPE ;rnstruct tokenrnchar type;rnchar string[MAXTOKENLEN];rn;rnint top = -1;rnrn//int t_num = 0; 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这是一篇关于机器人发展前景的外文文献,无翻译,请大家自己下载翻译
the application has stopped unexpectedly
09-25 13:46:46.038: W/dalvikvm(378): Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/mycomp/games/mygame/Mygame;rn09-25 13:46:46.098: W/dalvikvm(378): Class init failed in newInstance call (Lcom/mycomp/games/mygame/Mygame;)rn09-25 13:46:46.098: D/AndroidRuntime(378): Shutting down VMrn09-25 13:46:46.118: W/dalvikvm(378): threadid=1: thread exiting with uncaught exception (group=0x40015560)rn09-25 13:46:46.168: E/AndroidRuntime(378): FATAL EXCEPTION: mainrn09-25 13:46:46.168: E/AndroidRuntime(378): java.lang.ExceptionInInitializerErrorrn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.Class.newInstanceImpl(Native Method)rn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.Class.newInstance(Class.java:1409)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.ActivityThread.access$1500(ActivityThread.java:117)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.os.Handler.dispatchMessage(Handler.java:99)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.os.Looper.loop(Looper.java:123)rn09-25 13:46:46.168: E/AndroidRuntime(378): at android.app.ActivityThread.main(ActivityThread.java:3683)rn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.reflect.Method.invokeNative(Native Method)rn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.reflect.Method.invoke(Method.java:507)rn09-25 13:46:46.168: E/AndroidRuntime(378): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)rn09-25 13:46:46.168: E/AndroidRuntime(378): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)rn09-25 13:46:46.168: E/AndroidRuntime(378): at dalvik.system.NativeStart.main(Native Method)rn09-25 13:46:46.168: E/AndroidRuntime(378): Caused by: java.lang.UnsatisfiedLinkError: Couldn't load game: findLibrary returned nullrn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.Runtime.loadLibrary(Runtime.java:429)rn09-25 13:46:46.168: E/AndroidRuntime(378): at java.lang.System.loadLibrary(System.java:554)rn09-25 13:46:46.168: E/AndroidRuntime(378): at com.mycomp.games.mygame.Mygame.(Mygame.java:61)rn09-25 13:46:46.168: E/AndroidRuntime(378): ... 15 morern09-25 13:50:58.168: W/dalvikvm(407): Exception Ljava/lang/UnsatisfiedLinkError; thrown while initializing Lcom/mycomp/games/mygame/Mygame;rn09-25 13:50:58.218: W/dalvikvm(407): Class init failed in newInstance call (Lcom/mycomp/games/mygame/Mygame;)rn09-25 13:50:58.218: D/AndroidRuntime(407): Shutting down VMrn09-25 13:50:58.248: W/dalvikvm(407): threadid=1: thread exiting with uncaught exception (group=0x40015560)rn09-25 13:50:58.368: E/AndroidRuntime(407): FATAL EXCEPTION: mainrn09-25 13:50:58.368: E/AndroidRuntime(407): java.lang.ExceptionInInitializerErrorrn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.Class.newInstanceImpl(Native Method)rn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.Class.newInstance(Class.java:1409)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.ActivityThread.access$1500(ActivityThread.java:117)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.os.Handler.dispatchMessage(Handler.java:99)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.os.Looper.loop(Looper.java:123)rn09-25 13:50:58.368: E/AndroidRuntime(407): at android.app.ActivityThread.main(ActivityThread.java:3683)rn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.reflect.Method.invokeNative(Native Method)rn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.reflect.Method.invoke(Method.java:507)rn09-25 13:50:58.368: E/AndroidRuntime(407): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)rn09-25 13:50:58.368: E/AndroidRuntime(407): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)rn09-25 13:50:58.368: E/AndroidRuntime(407): at dalvik.system.NativeStart.main(Native Method)rn09-25 13:50:58.368: E/AndroidRuntime(407): Caused by: java.lang.UnsatisfiedLinkError: Couldn't load game: findLibrary returned nullrn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.Runtime.loadLibrary(Runtime.java:429)rn09-25 13:50:58.368: E/AndroidRuntime(407): at java.lang.System.loadLibrary(System.java:554)rn09-25 13:50:58.368: E/AndroidRuntime(407): at com.mycomp.games.mygame.Mygame.(Mygame.java:61)rn09-25 13:50:58.368: E/AndroidRuntime(407): ... 15 morern我是新手,才刚下载好软件,这是按照官网教程做hello World的,求教大神!
hibernate mapping error
Exception in thread "main" org.springframework.orm.hibernate3.HibernateQueryException: echo_message is not mapped. [from echo_message]; nested exception is org.hibernate.hql.ast.QuerySyntaxError: echo_message is not mapped. [from echo_message]rnorg.hibernate.hql.ast.QuerySyntaxError: echo_message is not mapped. [from echo_message]rnrn出现如上错误,不知道从何入手解决?rn谢谢!
java.lang.IllegalStateException: The specified child already has a parent. You m
这个错误我搜了下,都说是布局问题,我就在main.xml作了如下布局rnJAVA代码中是没有的,请问问题在哪rnrnrnrn rnrnrn rnrn rnrn rn rnrn
application error
事件类型: 错误rn事件来源: Application Errorrn事件种类: (100)rn事件 ID: 1000rn日期: 2007-11-24rn事件: 11:40:44rn用户: N/Arn计算机: PACSSERVERrn描述:rn错误应用程序 dllhost.exe,版本 5.2.3790.0,错误模块 ntdll.dll,版本 5.2.3790.1830,错误地址 0x000396d0。rnrn有关更多信息,请参阅在 http://go.microsoft.com/fwlink/events.asp 的帮助和支持中心。rn数据:rn0000: 41 70 70 6c 69 63 61 74 Applicatrn0008: 69 6f 6e 20 46 61 69 6c ion Failrn0010: 75 72 65 20 20 64 6c 6c ure dllrn0018: 68 6f 73 74 2e 65 78 65 host.exern0020: 20 35 2e 32 2e 33 37 39 5.2.379rn0028: 30 2e 30 20 69 6e 20 6e 0.0 in nrn0030: 74 64 6c 6c 2e 64 6c 6c tdll.dllrn0038: 20 35 2e 32 2e 33 37 39 5.2.379rn0040: 30 2e 31 38 33 30 20 61 0.1830 arn0048: 74 20 6f 66 66 73 65 74 t offsetrn0050: 20 30 30 30 33 39 36 64 000396drn0058: 30 0 rnrn系统 2003 server,IISrn各位谁知道这个错误是什么引起的?rn怎么解决
eclipse an error has occuredr!!!
!SESSION 2011-03-08 12:49:55.726 -----------------------------------------------rneclipse.buildId=M20110210-1200rnjava.version=1.3.0rnjava.vendor=Sun Microsystems Inc.rnBootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CNrnCommand-line arguments: -os win32 -ws win32 -arch x86rnrn!ENTRY org.eclipse.osgi 4 0 2011-03-08 12:49:56.122rn!MESSAGE Startup errorrn!STACK 1rnjava.lang.NoSuchMethodError: java.lang.Exception: method (Ljava/lang/String;Ljava/lang/Throwable;)V not foundrn at rn at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)rn at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)rn at org.eclipse.osgi.framework.internal.core.InternalSystemBundle.resume(InternalSystemBundle.java:207)rn at org.eclipse.osgi.framework.internal.core.Framework.launch(Framework.java:654)rn at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:298)rn at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:175)rn at java.lang.reflect.Method.invoke(Native Method)rn at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)rn at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)rn at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
An unkown error has occurred
用ADO連接 MS SQL 2k SERVER + Win2k adv serverrnADOConnection1 ADOQuery1 ADOTable1 rnrn我一運行程序就出現如下:rn project project1.exe raised exception class eoleexception with message 'an unkown error has occurred'.process stopped.use step or run to continue.rnrn 我找到了原因,但不知如何解決。是因為我在 ADOQuery1 中加了 Lookup 字段.rn
为什么会出现"A Runtime Error has occurred. Do you wish to Debug?"
我有一function resize(),是根据客户区的大小,来改变各控件的位置,大小.rnfunction resize()rnrnvar w = document.all.bd.clientWidth, h = document.all.bd.clientHeight;rnvar DwebW,DwebH,spaceW;rnDwebW = (h/3 -3 -20)*352/288;rnDwebH = h/3 -3 -20;rnspaceW = (w-3*(h/3-3-20)*352/288)/4;rn//========以下最多只能4个=======================================rndocument.all.DWebDvrView1.height=DwebH;rndocument.all.DWebDvrView1.width= DwebW;rndocument.all.DWebDvrView1.style.left= spaceW;rndocument.all.DWebDvrView1.style.top=3;rndocument.all.TimeStamp1.style.left= spaceW+(DwebW/2-10)/2;rndocument.all.TimeStamp1.style.top=h/3-20;rndocument.all.select1.style.left= spaceW+DwebW/2+(DwebW/2-102)/2;rndocument.all.select1.style.top=h/3-20;rndocument.all.select1.style.width= 102;rndocument.all.select1.style.height=23;rnrnrn我想在onload中运行,当只有少于四个,就可以.如多于四个就出现errorrn"A Runtime Error has occurred. Do you wish to Debug?"rnwhy?rn请帮帮我,多谢
an unexpected error has occurred
an unexpected error has occurred rnError Message:该项不适于在指定状态下使用!rnrnrn我用c#.NET连接数据库是出现了这种错误,怎么解决呀,请各位朋友帮帮忙
'An unknow error has occurred'
各大蝦早上好:rn 我在做一個主從結構form時,點擊一下'新增(append)', 在主表輸入框輸入資料,就 會出現上面的警示, 但我在從表中嘗試輸入卻不會有警示.已經出現好幾天了我確實是黔驢技窮了, 請高手支援, 多謝多謝. rnrn
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in
<%! ResultSet rs=null;%>rnrn <%rn int type=-1;//定义一个标志变量rn tryrn type=Integer.parseInt(request.getParameter("do"));//取得参数do的值,这个值决定了用户对数据库的操作类型rn catch(Exception eee)rn type=0;//如果没有这个参数或者其他原因发生异常,则默认为0rn rn tryrn Statement st=getStatement();//取得Statement对象,getStatement()函数将在步骤8中定义rn String name=request.getParameter("name");//取得参数name的值rnswitch(type)rn//如果为0,表示用户没有操作,则把所有数据库中的所有记录提取出来rn case 0:rn rs=st.executeQuery("select * from friends");//查询全部rn break;rn//如果为1,表示用户执行的是查询操作,则把符合要求的结果提取出来rn case 1:rn name=new String(name.getBytes("ISO-8859-1"));//改变字符编码,否则会出现中文乱码问题rn rs=st.executeQuery("select * from friends where name like '%"+name+"%'");//特定查询rn break;rn //如果为2,表示用户执行的是删除操作,则执行删除后再把控制权转向本页面rn case 2:rn name=new String(name.getBytes("ISO-8859-1"));rn st.executeUpdate("delete from friends where name ='"+name+"'");//删除rn response.sendRedirect("db1.jsp");rn break;rn//如果为3,表示用户执行的是插入操作,则执行插入后再把控制权转向本页面rncase 3:rn name=new String(name.getBytes("ISO-8859-1"));rn String tel=request.getParameter("tel");rn st.executeUpdate("insert into friends values('0','"+name+"','"+tel+"’)");//添加rn response.sendRedirect("db1.jsp");rn break;rn//如果为4,表示用户执行的是修改操作,则执行插入后再把控制权转向本页面rnrncase 4:rn name=new String(name.getBytes("ISO-8859-1"));rn tel=request.getParameter("tel");rn String sql="update friends set tel=’"+tel+"’ where name=’"+name+"'";rn st.executeUpdate(sql);//修改rn response.sendRedirect("db1.jsp");rn break;rnrn%>rnrnsql语句哪错了啊,大神求指教啊
浏览器请求springboot报错
Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Thu Nov 22 17:18:40 CST 2018 There was an unexpected error (type=Not Found, status=404...
Seeing the Stars
Problem DescriptionnDumbear likes to take a walk with his girlfriend, Jing. One day when they were taking a walk, they found that there were so many stars in the sky. But unfortunately, they could see few of the stars because many buildings around blocked their vision.nnJing asked Dumbear how many stars they could see. Jing also wanted to see the most beautiful star of them. Dumbear is very dumb, now he wants you to help him. If you know the locations of all the buildings, the directions of all the stars and the location of Dumbear and Jing, can you calculate the number of stars they could see and the minimum distance they should go for seeing the most beautiful star?nnYou can assume all the buildings are cuboids lay on the ground; all the stars are strictly above the ground and are infinite far away. You can also assume all the buildings do not intersect or touch one another and the location of Dumbear and Jing is strictly outside any building. Note that we consider a building blocks their vision if and only if the vision goes through the building strictly. Also note that no one can go through any building.n nnInputnThe first line contains a single integer T, indicating the number of test cases.nEach test case begins with four integers N, M, X, Y indicate the number of the stars, the number of the buildings, and the coordinates of Dumbear and Jing on the ground.nThen N lines follow, each line contains three integers Xi, Yi, Zi indicate a star’s direction. If your location is (x, y) on the ground, then the star will be in the direction (x, y, 0) => (x + Xi, y + Yi, Zi). Note that the most beautiful star is always the first.nThen M lines follow, each line contains five integers X1i, Y1i, X2i, Y2i, Hi indicate the building’s lower left coordinates, upper right coordinates on the ground and the height of it.nnTechnical Specificationnn1. 1 <= T <= 10020n2. 1 <= N <= 1000 Note for more than 99% of the test cases, 1 <= N <= 10n3. 1 <= M <= 20 Note for more than 99% of the test cases, 1 <= M <= 5n4. 0 <= |X|, |Y|, |Xi|, |Yi|, |X1i|, |Y1i|, |X2i|, |Y2i| <= 1000n5. X1i < X2i, Y1i < Y2i, 10 <= Zi, Hi <= 100n nnOutputnFor each test case, output the case number first, then the number of the stars they can see directly and the minimum distance they should go to see the most beautiful star. You should round the distance to 2 digits after the decimal point.n nnSample Inputn1n3 1 0 0n1 1 1n1 0 1n0 1 1n1 1 3 3 2n nnSample OutputnCase 1: 2 1.00
[Help]Error Msg: application has generated an exception that could not be handled
我用C#写了一程序,在自己机器上运行是好的,但打包好后在别的机器上运行中间时会出现:rnapplication has generated an exception that could not be handledrn等信息。如果对方机器上安有.net的话,就不会报错,如果没有安装的话,在软件使用过程中就会出现这种错误
Robotic Mapping: A survey
SLAM 领域大神,“概率机器人”作者 塞巴斯蒂安·特龙 对SLAM的经典综述文章,对于理解该领域大有裨益。
The application has stopped unexpectly怎么回事?
Android模拟器运行程序时经常会出现这个问题~不知道怎么回事?rnrn显示:The application has stopped unexpectly,please try again.rnrn路过的帮帮忙~解答下啊~~~
FTP the application has request a runtime to terminate it in anusual way 
我用VC6.0编的,里面用到FTP与服务器连接,要从服务器上下载文件,服务器上我写了一个socket已经连接上了,可是FTP这里我不知道怎么弄?服务器与客户端两边应该弄些什么?
Loadlibrary(abs.dll) failed - This application has failed to start because the a
在64位window下注册abs.dll时发生如下错误rnLoadlibrary(abs.dll) failed - This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem
Kenneth has developed this is a great little application whi
Kenneth has developed this is a great little application which reads a Microsoft Exchange mailbox and lets you know via playing a .WAV file when you have mail.
继承中的has a
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