数据传递-------@ResponseBody

1、导入jar包

jack-core-asl-1.9.11.jar

jack-mapper-asl-1.9.11.jar

2、配置springmvc-servlet.xml文件

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.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">

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

	<mvc:annotation-driven ></mvc:annotation-driven>

	<!-- 配置解析JSON类型 -->
	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
			</list>
		</property>
	</bean>

</beans>

3、编写javascript的ajax和后台springmvc的控制器

handler.java

package com.wh.handler;

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.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class TestResponseBody {
	/**
	 * 返回一个字符串的json格式
	 *
	 * produces="text/html;charset=UTF-8"
	 * 声明返回的类型
	 */
	@RequestMapping(value="/dealAjax.action",produces="text/html;charset=UTF-8")
	public @ResponseBody String dealAjax(){
		return "成功";
	}
	/*
	<script type="text/javascript" src="${pageContext.request.contextPath}/bootstrap/js/jquery.js"></script>
	<script>
		$(function() {
			$('button').click(function() {
				$.ajax({
					"url" : "dealAjax.action",
					"type" : "post"
				 "data":{"username":"jack"}
				}).done(function(result) {
					alert(result);
				}).fail(function(e) {
					alert(e);
				});
			});
		});
	</script>
	*/

	/**
	 * 返回一个对象的json格式
	 *
	 * 传对象时，不能指定为produces="text/html;charset=UTF-8"
	 */
	@RequestMapping(value="/dealAjax2.action")
	public @ResponseBody User dealAjax2(){
		User u=new User("张三",20,"男");
		return u;
	}
/*
<script>
	$(function() {
		$('button').click(function() {
			$.ajax({
				"url" : "${pageContext.request.contextPath}/dealAjax2.action",
				"type" : "post",
				 //注意：这里不能加下面这行，否则数据会传不到后台
				// "contentType": "application/json;charset=utf-8",
				"data":{"username":"jack"}
			}).done(function(data) {
				console.log("success...");
				console.log(data);
				alert(data.uname+"----"+data.uage+"----"+data.usex);
				//alert(data.uname);
			}).fail(function(e) {
				console.log("error...");
				console.log(e.responseText);
				//alert(e);
			});
		});
	});
</script>
*/

	/**
	 * 返回一个list集合的json格式
	 *
	 * 传对象时，不能指定为produces="text/html;charset=UTF-8"
	 */
	@RequestMapping(value="/dealAjax3.action")
	public @ResponseBody List<User> dealAjax3(){
		List<User> list=new ArrayList<User>();
		User u1=new User("张三",20,"男");
		User u2=new User("张三",20,"男");
		User u3=new User("张三",20,"男");
		list.add(u1);
		list.add(u2);
		list.add(u3);
		return list;
	}
/*
<script>
	$(function() {
		$('button').click(function() {
			$.ajax({
				"url" : "${pageContext.request.contextPath}/dealAjax3.action",
				"type" : "post",
				 //注意：这里不能加下面这行，否则数据会传不到后台
				 //"contentType": "application/json;charset=utf-8",
				"data":{"username":"jack"}
			}).done(function(data) {
				$.each(data,function(i,item){
					console.log("i="+i);
					console.log("item"+item);
					console.log(item.uname+"---"+item.uage);
				});
			}).fail(function(e) {
				console.log("error...");
				console.log(e.responseText);
			});
		});
	});
</script>
 */

	/**
	 * 返回一个Map集合的json格式,且map中的key值写死了
	 */
	@RequestMapping(value="/dealAjax4.action")
	@ResponseBody     //此注解不能省略 否则ajax无法接受返回值
	public Map<String,User> dealAjax4(){
		Map<String,User> map=new HashMap<String,User>();
		map.put("map1",new User("张三",20,"男"));
		return map;
	}
/*
 * <script>
	$(function() {
		$('button').click(function() {
			$.ajax({
				"url" : "${pageContext.request.contextPath}/dealAjax4.action",
				"type" : "post",
				"dataType":"json",
				"data":{"username":"jack"}
			}).done(function(data) {
				alert(data.map1.uname+"-----"+data.map1.uage);
				console.log(data.map1+data.map1.uname+"-----"+data.map1.uage);
			}).fail(function(e) {
				console.log("error...");
				console.log(e.responseText);
			});
		});
	});
</script>
 */

	/**
	 * 返回多个Map集合的json格式
	 * 并在前台遍历输出
	 * for ( var key in data) {
	 * 	console.log(key+"---"+data[key].uname+"---"+data[key].uage);
	 * }
	 */
	@RequestMapping(value="/dealAjax5.action")

	public @ResponseBody Map<String,User> dealAjax5(){
		Map<String,User> map=new HashMap<String,User>();
		map.put("map1",new User("张三",20,"男"));
		map.put("map2",new User("李四",21,"男"));
		map.put("map3",new User("王武",22,"男"));
		return map;
	}
/*
<script>
	$(function() {
		$('button').click(function() {
			$.ajax({
				"url" : "${pageContext.request.contextPath}/dealAjax5.action",
				"type" : "post",
				"dataType":"json",
				"data":{"username":"jack"}
			}).done(function(data) {
				 for ( var key in data) {
				 	console.log(key+"---"+data[key].uname+"---"+data[key].uage);
				 }
			}).fail(function(e) {
				console.log("error...");
				console.log(e.responseText);
			});
		});
	});
</script>
*/
}

遍历map集合的参考地址：http://blog.163.com/xueling1231989@126/blog/static/102640807201461744258436/