如下：

	@RequestMapping(value = "/data", method = RequestMethod.POST)
	@ResponseBody
	public User data() {
		User user = new User();
		user.setUsername("xiebinyu");
		return user;
	}

jackson-core-2.6.1.jar
jackson-databind-2.6.1.jar
jackson-annotations-2.6.1.jar

jackson-core-asl-1.9.12.jar
jackson-mapper-asl-1.9.12.jar
 

$.ajax({
	type : 'POST',
    contentType : 'application/json',
    url : '/data',
    dataType : 'json',
    success: function(data) {
    	console.log(data);
    },
    error:function(data) {
    	console.log(data);
    }
	
});