org.springframework.web.servlet.DispatcherServlet.noHandlerFound No mapping found for HTTP request

控制台报了这么个错：org.springframework.web.servlet.DispatcherServlet.noHandlerFound No mapping found for HTTP request with URI [/springmvc_response/js/jquery-2.1.0.min.js] in DispatcherServlet with name 'dispa

dexi.Chi 程序猿

3638人浏览 · 2020-03-07 13:31:20

dexi.Chi 程序猿 · 2020-03-07 13:31:20 发布

解决办法：springmvc静态资源配置错误。
以下是详细说明：
我的web是这么配置的servlet-mapping中的url-pattern一开始配置的就是 / 所以说不是web的事，这样排除web的问题
web.xml

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--配置前端控制器-->
  <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:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!--配置解决中文乱码的过滤器-->
  <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>

</web-app>

jsp

<%--
  Created by IntelliJ IDEA.
  User: administrator
  Date: 2020/3/5
  Time: 19:17
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <script type="text/javascript" src="js/jquery-2.1.0.min.js"></script>
    <script>
        //页面加载，绑定单击事件
        $(function(){
            $("#btn").click(function () {
                $.ajax({
                    url:"user/testAjax",
                    contentType:"application/json;charset=UTF-8",
                    data:'{username:"haha",password:"123",age:11}',
                    dataType:"json",
                    type:"post",
                    success:function (data) {

                    }

                });
            });
        });
    </script>
</head>
<body>
    <a href="user/testString">testString</a>
    <br/>
    <button id="btn">发送ajax的请求</button>
</body>

</html>

controller

package cn.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/user")
public class UserController {

    @RequestMapping("/testString")
    public String testString(){
        System.out.println("testString方法执行了...");
        return "success";
    }

    @RequestMapping("/testAjax")
    public void testAjax(@RequestBody String body){
        System.out.println("testAjax方法执行了...");
        System.out.println(body);
    }
}

重点来了springmvc.xml,原因是我静态资源配置有问题
错误的：

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

正确的：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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/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">

    <!--开启注解扫描-->
    <context:component-scan base-package="cn"/>
    <!--视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--前端控制器，哪些静态资源不拦截-->
    <mvc:resources location="/js/" mapping="/js/**"/>
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/images/" mapping="/images/**"/>
    <!--开启springMVC框架注解的支持-->
    <mvc:annotation-driven />
</beans>