springMVC框架下返回json格式的对象，list，map
来源：互联网 发布：淘宝不能结算怎么回事 编辑：程序博客网 时间：2024/05/19 03:17
原文地址：http://liuzidong.iteye.com/blog/1069343
注意这个例子要使用jquery，但是jquery文件属于静态的资源文件，所以要在springMVC中设置静态资源访问
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" 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>SpringMVCFile</display-name> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> <!-- 配置前台分发器 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 扫描使用springmvc配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-context.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> <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>springMVC的配置文件
<?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: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.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"> <!-- 扫描包裹，我们完全使用注释定义 Bean 并完成 Bean 之间装配： --> <context:component-scan base-package="com.fileUpDown" /> <!-- 解决了@Controller注解的使用前提配置。 --> <mvc:annotation-driven /> <!-- 配置对静态资源的处理 --> <!-- mapping是映射路径，location是本地属性就是webcontent下的目录，web-inf可能访问不到 --> <mvc:resources mapping="/file/**" location="/fileHome/" /> <!-- 定义view视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" /> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> </list> </property> </bean> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" /> <!-- 设置文件上传的一些属性 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="UTF-8" /></beans>前台的界面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><!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"> <%-- <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery/jquery-1.4.4.min.js"></script> --%> <script type="text/javascript" src="${pageContext.request.contextPath}/jquery-1.11.0.min.js"></script> <title>Spring MVC - jQuery 整合教程</title></head><body><h3>Spring MVC - jQuery 整合教程</h3><h4>AJAX version</h4><p>Demo 1 计算并返回值</p><div style="border: 1px solid #ccc; width: 250px;"> Add Two Numbers: <br/> <input id="inputNumber1" type="text" size="5"> + <input id="inputNumber2" type="text" size="9"> <input type="submit" id="demo1" value="Add" /> <br/> Sum: <br> <span id="sum">(Result will be shown here)</span></div><hr><br><p>Demo 2 获取一个对象</p><div style="border: 1px solid #ccc; width: 250px;"> <select id="userId"> <c:forEach var="index" begin="1" end="5" step="1"> <option value="${index}">${index}</option> </c:forEach> </select> <input type="submit" id="demo2" value="Get" /> <br/> <span id="info">(Result will be shown here)</span></div><hr><br><p>Demo 3 返回List集合对象</p><div style="border: 1px solid #ccc; width: 250px;"> <input type="submit" id="demo3" value="Get List User" /> <br/> <span id="listInfo">(Result will be shown here)</span></div><hr><br><p>Demo 4 返回Map集合对象</p><div style="border: 1px solid #ccc; width: 250px;"> <input type="submit" id="demo4" value="Get Map User" /> <br/> <span id="mapInfo">(Result will be shown here)</span></div><hr><br><a href="${pageContext.request.contextPath}/index.jsp">返回</a><hr><br><script type="text/javascript"> $(function() { $("#demo1").click(function(){ //当demo1发生点击事件后，对/main/ajax/add.do发送请求，把传递的数据以json的形式传递， //请求完成后使用function(data)函数，把结果显示到页面上来 $.post("${pageContext.request.contextPath}/main/ajax/add.do", {inputNumber1: $("#inputNumber1").val(), inputNumber2: $("#inputNumber2").val() }, function(data){ $("#sum").replaceWith('<span id="sum">'+ data + '</span>'); }); }); $("#demo2").click(function(){ var userId = $("#userId").val(); $.post("${pageContext.request.contextPath}/main/ajax/getUser/"+userId+".do", null, function(data){ var info = "姓名: " + data.name+",年龄: " + data.age + ",地址: " + data.address + ",性别: " + (data.sex == 1 ? "男" : "女")+",密码: " + data.password; $("#info").html(info); }); }); $("#demo3").click(function(){ $.post("${pageContext.request.contextPath}/main/ajax/userList.do", null, function(data){ var info = ''; $.each(data,function(index,entity) { info += "姓名: " + entity.name+",年龄: " + entity.age + ",地址: " + entity.address + ",性别: " + (entity.sex == 1 ? "男" : "女")+",密码: " + entity.password+"<br>"; }); $("#listInfo").html(info); }); }); $("#demo4").click(function(){ $.post("${pageContext.request.contextPath}/main/ajax/userMap.do", null, function(map){ var info = ''; $.each(map,function(key,values) { info += "key="+key+"<br>"; $(values).each(function(){ info += "姓名: " + this.name+",年龄: " + this.age + ",地址: " + this.address + ",性别: " + (this.sex == 1 ? "男" : "女")+",密码: " + this.password+"<br>"; }); }); $("#mapInfo").html(info); }); }); });</script></body></html>com.fileUpDown包下的action jqueryJsonAction.java
package com.fileUpDown;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;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;import com.springMVC.javaBean.User;@Controller@RequestMapping("/main/ajax")public class jqueryJsonAction { /** * 根据映射跳转到指定的页面 */ @RequestMapping(value = "/add", method = RequestMethod.GET) public String getAjaxAddPage() { // 跳转到ajax-add-page return "ajax-add-page"; } /** * 提交表单并进行运算. */ @RequestMapping(value = "/add", method = RequestMethod.POST) public @ResponseBody Integer add(@RequestParam(value = "inputNumber1", required = true) Integer inputNumber1, @RequestParam(value = "inputNumber2", required = true) Integer inputNumber2) { // 实现运算 Integer sum = inputNumber1 + inputNumber2; System.out.println("sum: " + sum); // @ResponseBody 会自动的将返回值转换成JSON格式 // 但是你必须添加jackson的jar包!!! return sum; } @RequestMapping(value = "/getUser/{userId}", method = RequestMethod.POST) /** * @ResponseBody注解用于将Controller的方法返回的对象，通过适当的HttpMessageConverter转换为指定格式后， * 写入到Response对象的body数据区 使用的时候Controller返回的不是界面的时候，是json或者xml */ /** * 当使用@RequestMapping URI template 样式映射时， 即 someUrl/{paramId}, * 这时的paramId可通过 @Pathvariable注解绑定它传过来的值到方法的参数上。 */ public @ResponseBody User getUser(@PathVariable("userId") String userId) { System.out.println("根据ID获取用户对象: " + userId); Map<String, User> users = new HashMap<String, User>(); users.put("1", new User("123456", "李逵", "123", "成都市", "1", 23)); users.put("2", new User("565676", "张三", "123", "北京市", "2", 53)); users.put("3", new User("325566", "李四", "123", "河南省", "2", 93)); users.put("4", new User("989654", "刘邦", "123", "蒙古包", "1", 13)); users.put("5", new User("234444", "王熙凤", "123", "成都市", "1", 43)); return users.get(userId); } @RequestMapping(value = "/userList", method = RequestMethod.POST) public @ResponseBody List<User> getUsers() { List<User> users = new ArrayList<User>(); users.add(new User("123456", "李逵", "123", "成都市", "1", 23)); users.add(new User("123457", "李四", "124", "北京市", "2", 53)); users.add(new User("123458", "李三", "125", "河南市", "0", 73)); users.add(new User("123459", "李五", "126", "大路市", "3", 93)); return users; } @RequestMapping(value="/userMap",method = RequestMethod.POST) public @ResponseBody Map<String,User> getMap(){ Map<String,User> map = new HashMap<String,User>(); for(int i=0;i<4;i++){ map.put(""+i, new User("123456", "李逵", "123", "成都市", "1", i+23)); } return map; }}javaBean对象
package com.springMVC.javaBean;public class User { private String num; private String name; private String password; private String address; private String sex; private int age; public User(String num, String name, String password, String address, String sex, int age) { super(); this.num = num; this.name = name; this.password = password; this.address = address; this.sex = sex; this.age = age; } public String getNum() { return num; } public void setNum(String num) { this.num = num; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public int getAge() { return age; } public void setAge(int age) { this.age = age; }}阅读全文
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