使用@ResponseBody,把要返回的对象自动拼成JSON的格式返回
当然,需要加入几个jackson的包,这里加入了:
jackson-core-2.1.2.jar、jackson-annotations-2.1.2.jar、jackson-databind-2.1.2.jar
n测试使用的Controller的方法:
@RequestMapping(value = "/hello") @ResponseBody public UserModel handleRequest(@RequestBody String reqBody, UserModel um) { System.out.println("the reqBody="+reqBody); um.setName(um.getName()+",server"); return um; }
测试使用的页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <script language="javascript" src="/mvcexample/static/js/jquery-1.3.2.min.js"></script> <script language="javascript"> $().ready(function(){ $.getJSON('/mvcexample/hello',{uuid:'1',name:'test'},function(data){ alert(data.uuid+" , "+data.name); }); }); </script>
去测试看看吧,可以看到Controller的方法直接返回一个um对象,但是 @ResponseBody会把这个对象自动变成json格式的,再传回客户端,非常方便。
当然, @ResponseBody也支持集合对象自动变成json格式,比如:
测试使用的Controller方法
@RequestMapping(value = "/hello") @ResponseBody public List<UserModel> handleRequest(@RequestBody String reqBody, UserModel um) { System.out.println("the reqBody="+reqBody); um.setName(um.getName()+",server"); List<UserModel> list = new ArrayList<UserModel>(); list.add(um); UserModel um2 = new UserModel(); um2.setUuid("22"); um2.setName("222"); list.add(um2); return list; }
n测试使用的页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head> <script language="javascript" src="/mvcexample/static/js/jquery-1.3.2.min.js"></script> <script language="javascript"> $().ready(function(){ $.getJSON('/mvcexample/hello',{uuid:'1',name:'test'},function(data){ $.each(data,function(index,v){ alert("tr="+v.uuid+",v="+v.name); }); }); }); </script>