SpringMVC RequestMappering注解映射错误，求解答，整了半天没整出来

夏日不浪漫 2019-01-05 02:06:58

这是前端的ajax代码：



$.ajax({

                        type : "post",

                        url : "login/validate",

                        dataType : "json",

                        data : login,

                        success : function (msg) {

                            if (msg.uName != userName) {

                                $(".err-msg").html("用户名或密码错误")

                                $(".error-item").css("display", "block")

                            } else {

                                $(window).attr('location','/emall/views/back/index.jsp');

                            }

                        }

                    });

Controller层的代码：



    @RequestMapping("/login/validate")

    @ResponseBody

    public User loginValidate(String uName, String uPassword, HttpServletRequest request) {

        User user = userService.selectByLogin(uName, uPassword);

        System.out.println("uName = " + uName);

        if (user != null) {

            HttpSession session = request.getSession();

            session.setAttribute("user", user);

            session.setAttribute("state", true);

        } else {

            user = new User();

            user.setuName("验证失败");

        }

        return user;

    }

applicationContext.xml配置



<?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:beans="http://www.springframework.org/schema/beans"

       xmlns:tx="http://www.springframework.org/schema/tx"

       xmlns:mvc="http://www.springframework.org/schema/mvc"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

         http://www.springframework.org/schema/beans/spring-beans-4.3.xsd

         http://www.springframework.org/schema/context

         http://www.springframework.org/schema/context/spring-context-4.3.xsd

         http://www.springframework.org/schema/mvc

         http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd

         http://www.springframework.org/schema/tx

         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "  >



    <!-- ①：对com.jason包中的所有类进行扫描，以完成Bean创建和自动依赖注入的功能 -->

    <context:component-scan base-package="com.jason"/>

    <!-- 静态资源访问 -->

    <!--如果webapp下你新建了文件夹，想访问里面的静态资源，那么就要在这配置一下-->

    <mvc:resources location="/images/" mapping="/images/**"/>

    <mvc:resources location="/css/" mapping="/css/**"/>

    <mvc:resources location="/js/" mapping="/js/**"/>



    <!-- Configures the @Controller programming model

    <mvc:annotation-driven />-->

    <!-- 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">

        <property name="messageConverters">

            <list>

                <ref bean="mappingJacksonHttpMessageConverter"/>

            </list>

        </property>

    </bean>



    <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">

        <property name="supportedMediaTypes">

            <list>

                <value>application/json;charset=UTF-8</value>

            </list>

        </property>

    </bean>



    <mvc:annotation-driven />



    <!-- 配置视图解析器，把控制器的逻辑视频映射为真正的视图 -->

    <!-- /WEB-INF/jsp/start.jsp -->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

        <property name="prefix" value="/views/" />

        <property name="suffix" value=".jsp" />

    </bean>







    <!-- 配置dbcp数据库连接池 -->



    <!-- <context:property-placeholder location="classpath:db.properties"/> -->

    <!--数据库配置 -->

    <bean id = "propertyConfigurer" class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

        <property name="locations">

            <list>

                <value>classpath:jdbc.properties</value>

            </list>

        </property>



    </bean>



    <!-- 数据库连接池 -->

    <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 name="maxActive" value="${maxActive}"/>

        <property name="maxIdle" value="${maxIdle}"/>

        <property name="minIdle" value="${minIdle}"/>

        <property name="maxWait" value="${maxWait}"/>

    </bean>



    <!-- 配置事务管理器 -->

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

        <property name="dataSource" ref="dataSource" />

    </bean>



    <!-- 注解管理事务 -->

    <tx:annotation-driven/>





    <!-- 拦截器 -->

    <mvc:interceptors>

        <!-- 国际化操作拦截器 如果采用基于（请求/Session/Cookie）则必需配置 -->

        <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />

    </mvc:interceptors>

    <!-- 定义无Controller的path<->view直接映射 -->

    <!-- <mvc:view-controller path="/" view-name="redirect:/" /> -->



    <!-- 配置会话工厂SqlSessionFactory -->



    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <!-- 数据源 -->

        <property name="dataSource" ref="dataSource"/>

        <property name="mapperLocations" value="classpath:sqlmap/*Mapper.xml"/>

        <property name="typeAliasesPackage" value="com.jason.entity" />



    </bean>



    <!-- 在spring容器中配置mapper的扫描器产生的动态代理对象在spring的容器中自动注册，bean的id就是mapper类名（首字母小写）-->

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

        <!-- 指定扫描包的路径，就是mapper接口的路径，多个包中间以 半角逗号隔开   -->

        <property name="basePackage" value="com.jason.dao"/>

        <!-- 配置sqlSessionFactoryBeanName -->

        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>

    </bean>

</beans>

web.xml



  <!-- 配置springmvc的前端控制器 指向spring-mvc.xml 程序在启动的时候就加载springmvc 可以接受所有请求 load-on-startup：表示启动容器时初始化该Servlet； -->

  <servlet>

    <servlet-name>springServlet</servlet-name>

    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <!-- 可以自定义servlet.xml配置文件的位置和名称， 默认为WEB-INF目录下，名称为[<servlet-name>]-servlet.xml，如spring-servlet.xml -->

    <init-param>

      <param-name>contextConfigLocation</param-name>

      <param-value> classpath:spring/applicationContext.xml</param-value>

    </init-param>

    <load-on-startup>1</load-on-startup>

  </servlet>

  <!-- 将前端URL请求和后台处理方法controller建立对应关系-->

  <servlet-mapping>

    <servlet-name>springServlet</servlet-name>

    <url-pattern>/</url-pattern>

  </servlet-mapping>

项目路径

报错：[http-nio-8080-exec-7] WARN [org.springframework.web.servlet.PageNotFound] - No mapping found for HTTP request with URI [/emall/views/user/login/validate] in DispatcherServlet with name 'springServlet'
一开始我将login.jsp直接放在webapp目录下就没有报错正常运行，但是一放到views/user目录下就开始报这个错，不知道为什么要报这个错，求大佬解答，感激不尽

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