在控制器类上用@RequestMapping后, 加载静态资源

在控制器类上用@RequestMapping后, 加载静态资源时会在访问路径上加上@RequestMapping中的值,这怎么解决

5个回答

注解@RequestMapping是用来将请求的地址url映射到对应的控制器上去

看看我这篇不完整的日志能否解决问题:

你的静态资源存储在资源路径下的assets文件夹下?需要配置静态资源路径映射。

详情参考 http://blog.csdn.net/isea533/article/details/50412212

 @Configuration
public class LocalMvcConfiguration extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
            registry.addResourceHandler("/assets/**")
            .addResourceLocations("classpath:/assets/");
    }
}
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dispatcher-servlet.xml -------------------------------------------------------------------------- <!-- 添加注解驱动 --> <mvc:annotation-driven /> <!-- 默认扫描的包路径 --> <context:component-scan base-package="com.xiao2edu.controller" /> <!-- ②:启动Spring MVC的注解功能,完成请求和注解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> <mvc:view-controller path="/" view-name="index" /> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> <description> </description> </bean> <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <!-- 配置jsp路径前缀 --> <property name="prefix" value="/"></property> <!-- 配置URl后缀 --> <property name="suffix" value=".jsp"></property> </bean> </beans> ------------------------------------------------------------------- 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:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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>Archetype Created Web Application</display-name> <!-- spring MVC的核心就是DispatcherServlet,使用springMVC的第一步就是将下面的servlet放入web.xml servlet-name属性非常重要,默认情况下,DispatchServlet会加载这个名字-servlet.xml的文件,如下,就会加载 dispather-servlet.xml,也是在WEN-INF目录下。 --> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <!-- 设置dispatchservlet的匹配模式,通过把dispatchservlet映射到/,默认servlet会处理所有的请求,包括静态资源 --> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 字符集过滤器 --> <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> <!-- Spring 服务层的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <!-- Spring 容器启动监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener </listener-class> </listener> </web-app> ------------------------------------------------------------------------ index.xml <form action="http://localhost:8081/my.d0?method=show" method="post"> 提交方式: <select name="manner"> <option value="get">get</option> <option value="post">post</option> </select> 请求url:<input id="url" name="url" type="text"></input><br> 内容:<input id="text1" name="text1" type="text"></input><br> <input type="submit" width:230px value="提交"> <br> <br> <br> 返回结果:<textarea rows="20" cols="50"></textarea> </form> ------------------------------------------------- MyController.java package com.xiao2edu.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; /** * @Controller,类级别上的注解。我们定义的类可以只是一个 javabean,不需要实现任何接口。标注了 * @Controller,借助 <context:component-scan>,框架能自动识别到这就是一个 Controller */ @Controller @RequestMapping(value="/my.do") public class MyController { // ② 如果URL请求中包括"method=listAllBoard"的参数,由本方法进行处理--> @RequestMapping(params = "method=show") //用来处理前台的请求 public String getBody(@RequestBody String body) { // 这里的 body 的内容就是 hello System.out.println("hello"); return null; } } ------------------------------------![图片说明](https://img-ask.csdn.net/upload/201511/06/1446774988_337781.png) ----------------------- 结果 HTTP ERROR: 404 Problem accessing /my/001. Reason: NOT_FOUND Powered by Jetty://

post提交form表单到springMVC,不能跳转问题

**项目结构: ** ![图片说明](https://img-ask.csdn.net/upload/201812/14/1544768206_941826.png) 1. jsp页面 **index.jsp** ``` <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>首页</title> </head> <body> <a href="/sdkapp/init">去往登录页</a> </body> </html> ``` **login.jsp** ``` <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>登录页</title> <script src="<%=request.getContextPath()%>/js/jquery-1.7.2.js" type="text/javascript"></script> </head> <body> <form id="frm"> 用户id: <input type="text" name="uid"><br><br> 用户名: <input type="text" name="username"><br><br> 密 码: <input type="password" name="password"><br><br> <input type="submit" id="btn" value="登录"> </form> <script type="text/javascript"> $("#btn").click(function () { console.log(getFormJson(frm)); $.ajax({ url: "${pageContext.request.contextPath}/sdkapp/login", type:"POST", data: getFormJson(frm), contentType:"application/json;charset=utf-8", success:function(data){ console.log(data) }, error:function(data){ console.log(data) } }); }) function getFormJson(frm) { //frm:form表单的id var o = {}; var a = $("#"+frm).serializeArray(); $.each(a, function() { if (o[this.name] !== undefined) { if (!o[this.name].push) { o[this.name] = [ o[this.name] ]; } o[this.name].push(this.value || ''); } else { o[this.name] = this.value || ''; } }); return o; } </script> </body> </html> ``` **success.jsp** ``` <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>登录成功页</title> </head> <body> <h1>登录成功</h1> </body> </html> ``` 2. 配置文件 **springmvc.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" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--配置默认的servlet处理器,处理静态资源加载--> <mvc:default-servlet-handler/> <!--配置包扫描controller--> <context:component-scan base-package="controller"/> <mvc:annotation-driven/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans> ``` **web.xml** <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_2_5.xsd" id="WebApp_ID" version="2.5"> <servlet> <servlet-name>springMvc</servlet-name> <!--加载前端控制器--> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/springmvc.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> </web-app> 3.java代码 **Login.java** ``` package controller; import controller.vo.User; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @RestController @RequestMapping(value = "/sdkapp") public class Login { @RequestMapping(value = "/init") public ModelAndView casdkbindInput(){ ModelAndView view = new ModelAndView("/login"); return view; } @RequestMapping(value = "/login",method = {RequestMethod.POST},consumes = "application/json;charset=utf-8") public ModelAndView testJson(@RequestBody User user) throws Exception { System.out.println(user); ModelAndView view = new ModelAndView("/success"); return view; } } ``` **vo/User.java** ``` package controller.vo; import java.io.Serializable; public class User implements Serializable { private String uid; private String username; private String password; public String getUid() { return uid; } public void setUid(String uid) { this.uid = uid; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "User{" + "uid='" + uid + '\'' + ", username='" + username + '\'' + ", password='" + password + '\'' + '}'; } } ``` 问题是 jq post请求到后台,后台返回 view时,前端接收不到? 附上demo地址:[百度云盘](https://pan.baidu.com/s/1edbTMGCw2wrhGKADY9x8XA "")

spring mvc注入controller失败找不到原因

运行不报错,根目录下的文件可以访问。但是访问不了Controller,打断点运行也进不去, 访问http://localhost:8081/rest/itemcat/list就404找不到页面,求大神解救。 这是springMVC配置文件 ``` <?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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.taotao.rest.controller" /> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans> ``` 这是Controller层 ``` package com.taotao.rest.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.MediaType; import org.springframework.http.converter.json.MappingJacksonValue; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.taotao.common.utils.JsonUtils; import com.taotao.rest.pojo.CatResult; import com.taotao.rest.service.ItemCatService; /** * 商品分类列表 * <p>Title: ItemCatController</p> * <p>Description: </p> * <p>Company: www.itcast.com</p> */ @Controller public class ItemCatController { @Autowired private ItemCatService itemCatService; /*@RequestMapping(value="/itemcat/list", produces=MediaType.APPLICATION_JSON_VALUE + ";charset=utf-8") @ResponseBody public String getItemCatList(String callback) { CatResult catResult = itemCatService.getItemCatList(); //把pojo转换成字符串 String json = JsonUtils.objectToJson(catResult); //拼装返回值 String result = callback + "(" + json + ");"; return result; }*/ @RequestMapping("/itemcat/list") @ResponseBody public Object getItemCatList(String callback) { CatResult catResult = itemCatService.getItemCatList(); MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(catResult); mappingJacksonValue.setJsonpFunction(callback); return mappingJacksonValue; } } ``` 这是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:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="taotao" version="2.5"> <display-name>taotao-portal</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <!-- 加载spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext-*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 解决post乱码 --> <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> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- springmvc的前端控制器 --> <servlet> <servlet-name>taotao-portal</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>taotao-portal</servlet-name> <!-- 伪静态化 --> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app> ```

整了一晚上SpringMVC,就是出不来!

## 为了方便大神们的在线阅读,我把截图贴出来,再为了方便大神们帮我测试,我把代码也贴在截图下面,谢谢! ## 好了,开始贴截图+代码: ## 1,控制器 ![图片说明](https://img-ask.csdn.net/upload/201606/28/1467126416_712533.jpg) @Controller @RequestMapping("/Hello") public class HelloWorldController { @RequestMapping("/a") public ModelAndView test1(){ System.out.println("测试一下"); ModelAndView andView = new ModelAndView(); andView.addObject("msg", "供视图引用的一段信息"); andView.setViewName("/WEB-INF/views/Hello.jsp"); return andView; ## 2,配置文件 ![图片说明](https://img-ask.csdn.net/upload/201606/28/1467126648_273951.jpg) <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" 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" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.cailikun" /> <!-- 开启对spring注解的支持 ,为了低版本兼容(Spring3.2及以上已自带) --> <context:annotation-config /> <!-- 静态资源访问 --> <mvc:default-servlet-handler /> <!-- SpringMVC开启注解支持,也是为了低版本兼容 --> <mvc:annotation-driven /> <!-- 配置上传解析器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设置上传文件的最大尺寸为1MB --> <property name="maxUploadSize"> <value>1048576</value> </property> </bean> </beans> ## 3,web.xml,有点长就不截图了,直接拷代码,抱歉 <?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:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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"> <display-name>SpringMVC</display-name> <!-- 放置到最前面:处理中文乱码的过滤器 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 告诉spring 按照什么编码进行转码 --> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncodingFilter</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> <!-- 告诉spring配置文件的放置从哪里加载 --> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> <!-- 配置了这个后,当服务器启动时,就开始实例化SpringMVC的核心控制器DispatcherServlet(有且只有一次) --> <!-- 也就是说:服务器启动变慢,访问变快 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <!-- url-pattern常用的两种配置方式: --> <!--1, *.do 拦截以do为后缀的请求 --> <!--2, / --> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app> ## 4,jsp视图 ![图片说明](https://img-ask.csdn.net/upload/201606/28/1467126821_910827.jpg) ## 求拯救!实在不知道怎么办了,检查了下被加载到tomcat里的文件,发现了一些疑问,怀疑也可能是tomcat的问题,这个链接就是后续提问:http://ask.csdn.net/questions/266317

Spring MVC 视图问题,访问 jsp 却返回字符串,紧急求助!

## war 包结构如下: ![图片说明](https://img-ask.csdn.net/upload/201712/11/1512999813_263311.png) ## spring-mvc 配置文件如下: <?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: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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 注解扫描包 --> <context:component-scan base-package="com.lvmama.ptest.controller" /> <!-- 开启注解 --> <mvc:annotation-driven /> <!-- 定义跳转的文件的前后缀 ,视图模式配置--> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 配置静态资源,直接映射到对应的文件夹,不被DispatcherServlet处理,3.04新增功能,需要重新设置spring-mvc-3.0.xsd --> <mvc:resources mapping="/img/**" location="/img/" /> <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/css/**" location="/css/" /> <mvc:resources mapping="/html/**" location="/html/" /> </beans> ## web.xml 配置如下: <?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"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 加载Spring容器配置 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 设置Spring容器加载所有的配置文件的路径 --> <context-param> <param-name>contextConfigLocation</param-name> <!-- <param-value>classpath:config/spring-*.xml</param-value> --> <param-value>classpath:applicationContext-service.xml</param-value> </context-param> <!-- 配置SpringMVC核心控制器 --> <servlet> <servlet-name>ptest_controller</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始配置化文件,前面contextConfigLocation看情况二选一 --> <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> <!--为DispatcherServlet建立映射 --> <servlet-mapping> <servlet-name>ptest_controller</servlet-name> <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 --> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 防止Spring内存溢出监听器 --> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <!-- 解决工程编码过滤器 --> <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> </web-app> 通过Controller 层访问jsp 页面,返回的是字符串“index” ![图片说明](https://img-ask.csdn.net/upload/201712/12/1513044114_362787.png) 但是输入jsp 以外的请求,又能正常访问: ![图片说明](https://img-ask.csdn.net/upload/201712/11/1513000331_464970.png) 请各位帮帮忙解答,十分感谢!!!! 对应的controller class 如下: @Controller public class PtestProjectController { @Autowired private PtestProjectService ptestprojectservice; @RequestMapping("/project/list/{id}") @ResponseBody public PtestProject getProjectById(@PathVariable int id) throws Exception{ PtestProject result = ptestprojectservice.getProjectById(id); return result; } @RequestMapping("/index") @ResponseBody public String getIndex() throws Exception{ return "index"; } } 为什么不返回jsp页面?

基于springmvc+mybatis的登录表单提交后404

前端填写正确的用户名和密码后,提交登录,浏览器显示404,前端提交的地址是/userlogin,后端对接的/user/userlogin也是对的,浏览器f12里显示请求的确成功传给了后端,但是不知道为什么404。用的是tomcat8.5,java版本1.8,phpstudy最新版,mysql5.7.26。 ## 这是所用到的包: ![图片说明](https://img-ask.csdn.net/upload/202002/01/1580567617_880785.jpg) ## 这是目录结构: ![图片说明](https://img-ask.csdn.net/upload/202002/01/1580567511_223692.jpg) ## 这是web.xml: ```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_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>springmvc_test</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 配置spring监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 加载spring配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/context-config.xml</param-value> </context-param> <!-- 配置前端控制器 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <!-- DispatcherServlet在初始化方法里面会读取该初始化参数的值来获得 spring配置文件的位置 ,然后启动spring容器。 --> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/springmvc-config.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> <!-- 配置字符编码 --> <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> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> ``` ## 这是context-config.xml: ```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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 扫描service包下的注解 --> <context:component-scan base-package="com.test.service"></context:component-scan> <!-- 配置数据库 --> <!-- 加载配置文件 --> <!-- <context:property-placeholder location="classpath:jdbc.properties"/> --> <bean id="dateSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driver" value="com.mysql.jdbc.Driver"></property> <property name="url" value="jdbc:mysql://localhost:3306/Eday_Test"></property> <property name="username" value="root"></property> <property name="password" value="123456"></property> </bean> <!-- 配置Sqlsessionfactory并将数据源注入 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 引入数据源 --> <property name="dateSource" ref="dateSource"></property> <!-- 载入mybatis配置文件 --> <property name="configLocation" value="classpath:mybatis-config.xml"></property> <!-- 载入配置mapper映射的xml --> <property name="mapperLocations" value="classpath:com/test/mapper/*.xml"></property> </bean> <!-- 配置扫描mapper接口 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackge" value="com.test.mapper"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dateSource" ref="dateSource"></property> </bean> <tx:annotation-driven transaction-manager="transactionManager"/> </beans> ``` ## 这是mybatis-config.xml: ```xml <?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> <typeAliases> <!-- 配置别名 --> <typeAlias alias="User" type="com.test.pojo.User"/> </typeAliases> </configuration> ``` ## 这是springmvc-config.xml: ```xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 扫描controller包下的注解 --> <context:component-scan base-package="com.test.controller"></context:component-scan> <!-- 开启注解 --> <mvc:annotation-driven></mvc:annotation-driven> <!-- 静态资源访问 --> <mvc:default-servlet-handler/> <!-- 视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 配置试图解析的默认路径,即配置页面的根路径 --> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans> ``` ## 这是UserController.java: ```java package com.test.controller; import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import com.test.pojo.User; import com.test.service.UserService; //声明控制器 @Controller //设置bean的scope属性为多例(prototype) @Scope("prototype") //设置请求映射,当客户端请求/user时,转到该控制器处理 @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @RequestMapping(value="/userlogin") public ModelAndView login(String user_Name,String user_pwd,ModelAndView mv,HttpSession session){ //调用userService中的login方法处理user实体类对象 User user = userService.login(user_Name,user_pwd); //登录的逻辑判断,判断条件是返回结果不为空 if(user!=null){ //登陆成功,将user对象设置到HttpSession作用范围域中,相当于服务端的cookie,有效时间默认30分钟 //在程序运行期间,在任意页面都可以提取它的值。 session.setAttribute("user",user); //转发到main请求 //登录成功,跳转页面 mv.setViewName("login/login-success"); }else{ //登录失败,向前端传递失败信息 mv.addObject("message","用户名或密码错误,请重新输入!"); //登录失败,跳转到登录页面 mv.setViewName("login"); } return mv; } //跳转到用户注册界面 @RequestMapping(value="/userregister"/*,method=RequestMethod.POST*/) public String register(User user){ String user_Name = user.getUser_Name(); //如果数据库中没有该用户,可以注册,否则跳转页面 if(userService.findByUserName(user_Name)==null){ //添加用户 userService.register(user); //注册成功,跳转到主页面 return "index"; }else{ //注册失败,跳转到错误页面 return "error"; } } } ``` ## 这是UserMapper.java: ```java package com.test.mapper; import org.apache.ibatis.annotations.Param; import com.test.pojo.User; public interface UserMapper { //根据用户名和密码查找,mybatis中有多个参数时,需要使用@Param注解 User findByUserNameAndPassword(@Param("user_Name")String user_Name,@Param("user_Pwd")String user_Pwd); //增加用户 void addUser(User user); //根据用户名查询 User findByUserName(String user_Name); } ``` ## 这是UserMapper.xml: ```xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.tes.mapper.UserMapper"> <!-- 根据用户名和密码查询 --> <select id="findByUserNameAndPasssword" resultType="User"> select * from user where user_Name=#{user_Name} and user_Pwd=#{user_Pwd} </select> <!-- 增加用户 --> <insert id="addUser" parameterType="User"> insert into user (user_Name,user_Pwd,user_Email,user_NickName,user_Birth,user_Phone,user_InvitationCode) values(#{user_Name},#{user_Pwd},#{user_Email},#{user_NickName},#{user_Birth},#{user_Phone},#{user_InvitationCode}) </insert> <!-- 根据用户名查询 --> <select id="findByUserName" resultType="User"> select * from user where user_Name=#{user_Name} </select> </mapper> ``` ## 这是User.java: ```java package com.test.pojo; import java.sql.Timestamp; public class User { private int user_Id; private String user_Name; private int user_Pwd; private String user_Email; private String user_NickName; private Timestamp user_Time; private String user_Birth; private int user_Fans; private int user_Follow; private int user_Score; private String user_HeadImgAddr; private int user_Phone; private String user_InvitationCode; public int getUser_Id() { return user_Id; } public void setUser_Id(int user_Id) { this.user_Id = user_Id; } public String getUser_Name() { return user_Name; } public void setUser_Name(String user_Name) { this.user_Name = user_Name; } public int getUser_Pwd() { return user_Pwd; } public void setUser_Pwd(int user_Pwd) { this.user_Pwd = user_Pwd; } public String getUser_Email() { return user_Email; } public void setUser_Email(String user_Email) { this.user_Email = user_Email; } public String getUser_NickName() { return user_NickName; } public void setUser_NickName(String user_NickName) { this.user_NickName = user_NickName; } public Timestamp getUser_Time() { return user_Time; } public void setUser_Time(Timestamp user_Time) { this.user_Time = user_Time; } public String getUser_Birth() { return user_Birth; } public void setUser_Birth(String user_Birth) { this.user_Birth = user_Birth; } public int getUser_Fans() { return user_Fans; } public void setUser_Fans(int user_Fans) { this.user_Fans = user_Fans; } public int getUser_Follow() { return user_Follow; } public void setUser_Follow(int user_Follow) { this.user_Follow = user_Follow; } public int getUser_Score() { return user_Score; } public void setUser_Score(int user_Score) { this.user_Score = user_Score; } public String getUser_HeadImgAddr() { return user_HeadImgAddr; } public void setUser_HeadImgAddr(String user_HeadImgAddr) { this.user_HeadImgAddr = user_HeadImgAddr; } public int getUser_Phone() { return user_Phone; } public void setUser_Phone(int user_Phone) { this.user_Phone = user_Phone; } public String getUser_InvitationCode() { return user_InvitationCode; } public void setUser_InvitationCode(String user_InvitationCode) { this.user_InvitationCode = user_InvitationCode; } @Override public String toString() { return "User [user_Id=" + user_Id + ", user_Name=" + user_Name + ", user_Pwd=" + user_Pwd + ", user_Email=" + user_Email + ", user_NickName=" + user_NickName + ", user_Time=" + user_Time + ", user_Birth=" + user_Birth + ", user_Fans=" + user_Fans + ", user_Follow=" + user_Follow + ", user_Score=" + user_Score + ", user_HeadImgAddr=" + user_HeadImgAddr + ", user_Phone=" + user_Phone + ", user_InvitationCode=" + user_InvitationCode + "]"; } } ``` ## 这是UserService.java: ```java package com.test.service; import com.test.pojo.User; public interface UserService { //通过用户名及密码核查用户登录 User login(String user_Name,String user_Pwd); //增加用户 void register(User user); //根据用户名查询 User findByUserName(String user); } ``` ## 这是UserServiceImpl.java: ```java package com.test.service.impl; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.test.mapper.UserMapper; import com.test.pojo.User; import com.test.service.UserService; @Service @Transactional public class UserServiceImpl implements UserService { //注入UserMapper接口 @Autowired private UserMapper userMapper; //登录,根据用户名和密码进行查询 @Override public User login(String user_Name,String user_Pwd){ return userMapper.findByUserNameAndPassword(user_Name,user_Pwd); } //注册,增加用户 @Override public void register(User user){ userMapper.addUser(user); } //根据用户名查询 @Override public User findByUserName(String user_Name){ return userMapper.findByUserName(user_Name); } } ``` ##这是login.jsp ```jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="../css/login.css" /> <title>登录</title> </head> <body> <!--导航栏--> <nav class="nav"> <ul> <li class="logo"><a href="#">Eday</a></li> <li class="shouye"><a href="../index.jsp" class="neirong">首页</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">文章列表</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">留言板</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">更新日志</a></li> </ul> </nav> <!--登录板块--> <header class="header"> <p class="logintitle"> <b>登录</b> </p> <form action="${pageContext.request.contextPath }/user/userlogin" method="post" class=login-form> <p class= login-username-p> <label for="username" class="login-username-text">用户名:</label> <input type=text name="user_Name" class="login-username-input"> <br><a href="register.jsp" class=login-register>注册</a> </p> <p class="login-psw-p"> <label for="psw" class="login-psw-text">密码:</label> <input type=password name="user_Pwd" class="login-psw-input"> <br><a href="#" class=login-forget>忘记密码</a> </p> <div class=login-button-div> <label for=button></label> <button type=sublim class=login-button>登录</button> </div> </form> </header> </body> </html> ``` ## 这是login-success.jsp: ```jsp <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>登录成功,请等待跳转...</title> <script type="text/javascript"> onload=function(){ setInterval(go, 1000); }; var x=3; //利用了全局变量来执行 function go(){ x--; if(x>0){ document.getElementById("sp").innerHTML=x; //每次设置的x的值都不一样了。 }else{ location.href='../index.jsp'; } } </script> </head> <body> <!--导航栏--> <nav class="nav"> <ul> <li class="logo"><a href="#">Eday</a></li> <li class="shouye"><a href="../index.jsp" class="neirong">首页</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">文章列表</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">留言板</a></li> <li class="fgx">|</li> <li><a href="#" class="neirong">更新日志</a></li> </ul> </nav> <header> <div> <p>登录成功!页面将在3秒后自动跳转,请稍等...</p> </div> </header> </body> </html> ``` ## 这是数据库: ![图片说明](https://img-ask.csdn.net/upload/202002/01/1580568589_694404.jpg)

Spring mvc 空指针错误

LoginController ``` @Controller public class LoginController { @RequestMapping("test") public void login() { LoginServiceImp loginService = new LoginServiceImp(); loginService.loadUserInfo(); } } ``` LoginServiceImp ``` public class LoginServiceImp implements ILoginService { LoginDaoImp loginDao = new LoginDaoImp(); /* * (non-Javadoc) * * @see * com.sani.service.ILoginService#loadUserInfo(com.sani.bean.UserInfoBean) */ public List loadUserInfo() { return loginDao.loadUserInfo(); } } ``` LoginDaoImp ``` public class LoginDaoImp extends BaseDao implements ILoginDao { /* * (non-Javadoc) * * @see com.sani.dao.ILoginDao#loadUserInfo() */ public List<UserInfoBean> loadUserInfo() { String sql = "select NOW();"; List tmpList = this.getJdbcTemplate().queryForList(sql); System.out.println(tmpList.size()); return tmpList; } } ``` BaseDao ``` public class BaseDao extends JdbcDaoSupport { Logger log = Logger.getLogger(this.getClass().getName()); } ``` 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"> <!-- 字符编码过滤器 --> <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> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>classpath:log4j.properties</param-value> </context-param> <context-param> <param-name>log4jRefreshInterval</param-name> <param-value>60000</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> <!-- 应用上下文配置文件 --> <!-- Spring 容器加载 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-db.xml</param-value> </context-param> <!-- 配置spring核心servlet --> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- url-pattern配置为/,不带文件后缀,会造成其它静态文件(js,css等)不能访问。如配为*.do,则不影响静态文件的访问 --> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <session-config> <session-timeout>30</session-timeout> </session-config> <!-- 欢迎页面 --> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> ``` spring-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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- 启动注解驱动的Spring MVC功能,注册请求url和注解POJO类方法的映射--> <mvc:annotation-driven /> <!-- 允许对静态资源文件的访问 --> <mvc:default-servlet-handler /> <!-- 启动包扫描功能,以便注册带有@Controller、@Service、@repository、@Component等注解的类成为spring的bean --> <context:component-scan base-package="com.sani.controller" /> <context:component-scan base-package="com.sani.service" /> <context:component-scan base-package="com.sani.dao" /> <!-- 对模型视图名称的解析,在请求时模型视图名称添加前后缀 --> <!-- jsp视图解析器 --> <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> <property name="order" value="1" /> </bean> </beans> ``` spring-db.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:aop="http://www.springframework.org/schema/aop" xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:task="http://www.springframework.org/schema/task" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" 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/task http://www.springframework.org/schema/task/spring-task-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd" default-autowire="byName"> <!-- <context:property-placeholder location="classpath:jdbc.properties" /> --> <!-- 配置数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" lazy-init="false"> <property name="driverClass" value="com.mysql.jdbc.Driver" /> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/wms" /> <property name="user" value="root" /> <property name="password" value="123" /> <!--连接池中保留的最小连接数。 --> <property name="minPoolSize"> <value>5</value> </property> <!--连接池中保留的最大连接数。Default: 15 --> <property name="maxPoolSize"> <value>30</value> </property> <!--初始化时获取的连接数,取值应在minPoolSize与maxPoolSize之间。Default: 3 --> <property name="initialPoolSize"> <value>10</value> </property> <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> <property name="maxIdleTime"> <value>60</value> </property> <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> <property name="acquireIncrement"> <value>5</value> </property> <!-- JDBC的标准参数,用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。 如果maxStatements与maxStatementsPerConnection均为0,则缓存被关闭。Default: 0 --> <property name="maxStatements"> <value>0</value> </property> <!--每60秒检查所有连接池中的空闲连接。Default: 0 --> <property name="idleConnectionTestPeriod"> <value>60</value> </property> <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 --> <property name="acquireRetryAttempts"> <value>30</value> </property> <!-- 获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留,并在下次调用getConnection()的时候继续尝试获取连接。如果设为true,那么在尝试 获取连接失败后该数据源将申明已断开并永久关闭。Default: false --> <property name="breakAfterAcquireFailure"> <value>true</value> </property> <!-- 因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable 等方法来提升连接测试的性能。Default: false --> <property name="testConnectionOnCheckout"> <value>false</value> </property> </bean> <!-- 配置Jdbc模板 --> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" lazy-init="false"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="baseDAO" class="com.sani.dao.imp.BaseDao" lazy-init="false"> <property name="jdbcTemplate" ref="jdbcTemplate" /> </bean> </beans> ``` 现在只要调用action—test就会空指针 是什么原因?应该这么改?

springmvc+mybatis调用controller报autowired失败

@service、@controller都写了,@service也写在了实现类而不是接口上,controller中autowired标在了set方法上,单元测试中service和serviceImpl没有问题,但页面调用controller却宝座autowired失败找不到对应service网上找了很多问题我都没有,大概是我检查不够仔细?求大神帮助 添加了一下spring配置和web.xml 异常信息: ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void controller.LoginController.setLoginService(service.LoginService); nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [service.LoginService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} ``` controller ``` @Controller("loginController") @RequestMapping("/User") @Component public class LoginController { private LoginService loginService; public LoginService getLoginService() { return loginService; } @Autowired @Qualifier("loginService") public void setLoginService(LoginService loginService) { this.loginService = loginService; } @RequestMapping(value = "/Login",method=RequestMethod.POST) public String userLogin(HttpSession session,@RequestParam("userid") String userid, @RequestParam("password") String password, @RequestParam("perflg") int perflg,Model model ) { User user = loginService.Login(userid, password, perflg); if (loginService.Login(userid, password, perflg) != null) { session.setAttribute("userid", user.getUserId()); session.setAttribute("username",user.getUserName()); session.setAttribute("permission", user.getPermission()); session.removeAttribute("nologin"); if (perflg == 0) { return "adminhome"; } if (perflg == 1) { return "goverhome"; } if (perflg == 2) { return "compahome"; } if (perflg == 3) { return "consehome"; } if (perflg == 4) { return "peoplehome"; } } model.addAttribute("Lb_alert", "用户名或密码不正确"); session.setAttribute("nologin", "你还没有登陆."); return "forward:/Login"; } } ``` serviceimpl: ``` @Service("loginService") @Transactional @Component public class LoginServiceImpl implements LoginService { private LoginMapper loginMapper; public LoginMapper getLoginMapper() { return loginMapper; } @Autowired public void setLoginMapper(LoginMapper loginMapper) { this.loginMapper = loginMapper; } @Override public User Login(String userid, String password, int perflg){ return loginMapper.Login(userid, password, perflg); } } ``` service ``` public interface LoginService { public User Login(String userid,String password,int perflg); } ``` spring.xml ``` <!-- 引入属性文件 --> <context:property-placeholder location="classpath:mysqldb.properties" /> <!-- 自动注入 --> <context:component-scan base-package="service" /> <!-- 加载properties文件 --> <!-- <bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="locations"> <list> <value>classpath:mysqldb.properties</value> </list> </property> </bean> --> ``` spring-mvc.xml ``` <!-- 自动扫描controller包下的所有类,使其认为spring mvc的控制器 --> <context:component-scan base-package="controller" /> <!-- 配置静态资源吗,直接映射到对应的文件夹,不被DispatcherServlet处理,需要重新spring-mvc-3.0.xsd --> <mvc:resources mapping="/images/**" location="/images/" /> <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/css/**" location="/css/" /> <!-- 对转向页面的路径解析。prefix:前缀, suffix:后缀 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" /> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding"> <value>UTF-8</value> </property> <property name="maxUploadSize"> <value>32505856</value><!-- 上传文件 大小限制为31M,31*1024*1024 --> </property> <property name="maxInMemorySize"> <value>4096</value> </property> </bean> ``` spring-mybatis.xml ``` <!-- 配置数据源 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <!-- 基本属性 url、user、password --> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/electric" /> <property name="username" value="root" /> <property name="password" value="root" /> <property name="initialSize" value="1" /> <property name="minIdle" value="1" /> <property name="maxActive" value="20" /> <property name="maxWait" value="60000" /> <!-- 超过时间限制是否回收 --> <property name="removeAbandoned" value="true" /> <!-- 超过时间限制多长; --> <property name="removeAbandonedTimeout" value="180" /> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000" /> <!-- 用来检测连接是否有效的sql,要求是一个查询语句--> <property name="validationQuery" value="SELECT 1" /> <!-- 申请连接的时候检测 --> <property name="testWhileIdle" value="true" /> <!-- 申请连接时执行validationQuery检测连接是否有效,配置为true会降低性能 --> <property name="testOnBorrow" value="false" /> <!-- 归还连接时执行validationQuery检测连接是否有效,配置为true会降低性能 --> <property name="testOnReturn" value="false" /> </bean> <!-- Mybatis文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 映射文件路径 --> <property name="mapperLocations" value="classpath:mapping/*.xml" /> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="mapper" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> <!-- 事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> ``` web.xml ``` <display-name>Archetype Created Web Application</display-name> <!-- Spring和mybatis的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value> </context-param> <!-- spring mvc servlet --> <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>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!-- 配置session超时时间,单位分钟 --> <session-config> <session-timeout>15</session-timeout> </session-config> ```

服务器启动失败,貌似是扫描的问题 但是我点击扫描能跳转过去...

我使用的是idea 点扫描能直接点过去 但是就是一直报错 错误信息是 ``` 2019-06-04 15:49:15,232 1700 [on(4)-127.0.0.1] ERROR work.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'accuserServiceImpl': Unsatisfied dependency expressed through field 'accuserDao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ssmmaven.dao.IAccuserDao' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:409) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4643) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5109) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:742) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:718) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:703) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1737) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:457) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:406) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at 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sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.ssmmaven.dao.IAccuserDao' available: expected at least 1 bean which qualifies as autowire candidate. 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package com.ssmmaven.service.impl; import com.ssmmaven.dao.IAccuserDao; import com.ssmmaven.domain.Accuser; import com.ssmmaven.service.IAccuserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.util.List; @Service @Transactional public class AccuserServiceImpl implements IAccuserService { @Autowired private IAccuserDao accuserDao; public List<Accuser> findall() { System.out.println("service-findall"); return null; } } ``` AccuserController ``` package com.ssmmaven.controller; import com.ssmmaven.service.IAccuserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller @RequestMapping("/accuser") public class AccuserController { @Autowired private IAccuserService AccuserService; @RequestMapping("/findall") 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<!--find* 的方法只读事务--> <tx:method name="find*" read-only="true"/> <!--除了find* 方法正常执行事务--> <tx:method name="*"/> </tx:attributes> </tx:advice> <!--配置aop增强--> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.ssmmaven.service.impl.*ServiceImpl.*(..))"/> </aop:config> </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:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--开启注解扫描,只扫描controller--> <context:component-scan 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已经连续五年参加大厂校招、社招的技术面试工作,简历看的不下于万份 这篇文章会用实例告诉你,什么是差的程序员简历! 疫情快要结束了,各个公司也都开始春招了,作为即将红遍大江南北的新晋UP主,那当然要为小伙伴们做点事(手动狗头)。 就在公众号里公开征简历,义务帮大家看,并一一点评。《启舰:春招在即,义务帮大家看看简历吧》 一石激起千层浪,三天收到两百多封简历。 花光了两个星期的所有空闲时...

《经典算法案例》01-08:如何使用质数设计扫雷(Minesweeper)游戏

我们都玩过Windows操作系统中的经典游戏扫雷(Minesweeper),如果把质数当作一颗雷,那么,表格中红色的数字哪些是雷(质数)?您能找出多少个呢?文中用列表的方式罗列了10000以内的自然数、质数(素数),6的倍数等,方便大家观察质数的分布规律及特性,以便对算法求解有指导意义。另外,判断质数是初学算法,理解算法重要性的一个非常好的案例。

《Oracle Java SE编程自学与面试指南》最佳学习路线图(2020最新版)

正确选择比瞎努力更重要!

面试官:你连SSO都不懂,就别来面试了

大厂竟然要考我SSO,卧槽。

微软为一人收购一公司?破解索尼程序、写黑客小说,看他彪悍的程序人生!...

作者 | 伍杏玲出品 | CSDN(ID:CSDNnews)格子衬衫、常掉发、双肩包、修电脑、加班多……这些似乎成了大众给程序员的固定标签。近几年流行的“跨界风”开始刷新人们对程序员的...

终于,月薪过5万了!

来看几个问题想不想月薪超过5万?想不想进入公司架构组?想不想成为项目组的负责人?想不想成为spring的高手,超越99%的对手?那么本文内容是你必须要掌握的。本文主要详解bean的生命...

我说我懂多线程,面试官立马给我发了offer

不小心拿了几个offer,有点烦

自从喜欢上了B站这12个UP主,我越来越觉得自己是个废柴了!

不怕告诉你,我自从喜欢上了这12个UP主,哔哩哔哩成为了我手机上最耗电的软件,几乎每天都会看,可是吧,看的越多,我就越觉得自己是个废柴,唉,老天不公啊,不信你看看…… 间接性踌躇满志,持续性混吃等死,都是因为你们……但是,自己的学习力在慢慢变强,这是不容忽视的,推荐给你们! 都说B站是个宝,可是有人不会挖啊,没事,今天咱挖好的送你一箩筐,首先啊,我在B站上最喜欢看这个家伙的视频了,为啥 ,咱撇...

代码注释如此沙雕,会玩还是你们程序员!

某站后端代码被“开源”,同时刷遍全网的,还有代码里的那些神注释。 我们这才知道,原来程序员个个都是段子手;这么多年来,我们也走过了他们的无数套路… 首先,产品经理,是永远永远吐槽不完的!网友的评论也非常扎心,说看这些代码就像在阅读程序员的日记,每一页都写满了对产品经理的恨。 然后,也要发出直击灵魂的质问:你是尊贵的付费大会员吗? 这不禁让人想起之前某音乐app的穷逼Vip,果然,穷逼在哪里都是...

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