通常表单submit传的是 json对象  

ajax 传的是json对象

angular传的是json字符串

对于后台接收json对象不需要再参数上加@RequestBody

而对于接收json字符串 需要加@RequestBody，并且要引入jackjson jar包

（1）angular向后台传json字符串 @RequestBody

前台angular代码

 $http({
              	    method:'POST',
              	    url:"http://localhost:8090/angu_demo/test.chtm",
              	    data:{"age":20 }
              	  })
              	.success(function(data,header,config,status){
              	//响应成功
              		$scope.names = data[0].age;

              	}).error(function(data,header,config,status){
              	//处理响应失败
              	});

后台spring mvc代码

	@RequestMapping("/test.chtm")
	@ResponseBody
	public List<UserBean> test(@RequestBody UserBean userBean,Model model,HttpServletRequest request,HttpServletResponse response){

		int age2=userBean.getAge();
		userBean.setAge(age2+1);
		List<UserBean>list=new ArrayList<UserBean>();
		list.add(userBean);
	    return list;

	}
	

（2）angular向后台传递json对象

前台angular代码

	$http.defaults.headers.post["Content-Type"] = "application/x-www-form-urlencoded";
                var transform =function(data){return $.param(data);    }  

              	$http.post("http://localhost:8090/angu_demo/test.chtm",{"age":20 }, {headers: {'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'}, transformRequest: transform})
              	.success(function(data,header,config,status){
              	//响应成功
              		$scope.names = data[0].age;

              	}).error(function(data,header,config,status){
              	//处理响应失败
              	});

后台 spring mvc代码

	@RequestMapping("/test.chtm")
	@ResponseBody
	public List<UserBean> test( UserBean userBean,Model model,HttpServletRequest request,HttpServletResponse response){

		int age2=userBean.getAge();
		userBean.setAge(age2+1);
		List<UserBean>list=new ArrayList<UserBean>();
		list.add(userBean);
	    return list;

	}

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