<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xmlns="http://xmlns.jcp.org/xml/ns/javaee"         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee                              http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"         id="WebApp_ID"         version="3.1">    <display-name>web</display-name>        <!-- 配置springMVC请求分配Servlet -->    <servlet>        <servlet-name>springMVC</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <!--        <!-- 声明配置文件存放位置和配置文件的名称,加入不配置此标签,springMVC的配置文件名称默认为<servlet-name>的值加上"-servlet.xml",例如本例便是springMVC-servlet.xml -->        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>/WEB-INF/*-servlet.xml</param-value>        </init-param>        -->        <!-- 值小于1时,表示容器启动时并不加载此servlet,此时只有当第一次使用servlet时才会加载,但当值大于等于1时,表示容器启动时会立即加载此servlet,此时值越大表示加载的优先级越小 -->        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>springMVC</servlet-name>        <!-- 请求链接以do结尾,具体怎么回事请耐心继续往下看 -->        <url-pattern>*.do</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>

<?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">    <!-- 扫描指定包下的所有类,倘若发现@Component,@Controller,@Service,@Repsitory等注解,则将相应的类实例化 -->    <context:component-scan base-package="org.xt.controller"/>    <!-- 配置视图资源 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!-- 此乃视图资源的前缀 -->        <property name="prefix" value="/WEB-INF/page"/>        <!-- 此乃视图资源的后缀 -->        <property name="suffix" value=".jsp"/>    </bean>    <!-- 此处乃进行json数据传输的关键,当配置 -->    <bean id="jsonMapping" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">        <property name="messageConverters">            <list>                <ref bean="jsonMapping"/>            </list>        </property>    </bean></beans>

package org.xt.pojo;import java.io.Serializable;@SuppressWarnings("serial")public class User implements Serializable {    private long userId;    private String userName;    private String userPassword;    public long getUserId() {        return this.userId;    }    public void setUserId(long userId) {        this.userId = userId;    }    public String getUserName() {        return this.userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public String getUserPassword() {        return this.userPassword;    }    public void setUserPassword(String userPassword) {        this.userPassword = userPassword;    }}

package org.xt.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.ResponseBody;import org.xt.pojo.User;@Controller@RequestMapping("/test")public class TestJSONController {    /*     *看value属性,是以do结尾的,这正是web.xml配置url-pattern的值为*.do的原因,     *这样所有的请求链接都必须以.do结尾,这样做的好处在于可以将请求链接同其他链接区分开来.     *笔者建议如此做(当然了,你也可以将.do换成.html,.htm或者其他)    */    @RequestMapping(value = "http://www.mamicode.com/testJSON.do",method={RequestMethod.POST})    @ResponseBody    public User testJSON(@RequestBody User user) {        System.out.println(user.getUserName() + " " + user.getUserPassword());        return user;    }}

<%@ 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>TestJSONForSpringMVC</title></head><body>    用户名:    <input id="userName" type="text" style="width:150px" />    <br />     <br />    密&nbsp;&nbsp;&nbsp;&nbsp;码:    <input id="userPassword" type="password" style="width:150px" />    <br />    <br />    <input id="login" type="button" value="登录" />    <!-- 注意了,此处jquery的路径记得替换成你自己jquery所在的路径 -->    <script type="text/javascript" src="jquery.js"></script>    <script type="text/javascript">        $("#login").click(function() {            $.ajax({                url : "test/testJSON.do",                type : "POST",                dataType : "json",                contentType : "application/json;charset=UTF-8",                data : JSON.stringify({                    userId : "1",                    userName : $("#userName").val(),                    userPassword : $("#userPassword").val()                }),                success : function(result) {                    alert(JSON.stringify(result));                },                error:function(result){                    alert("Sorry,you are make a error!");                }            });        });    </script></body></html>