spring mvc restful service

package com.bill.springrest.controller; import java.util.ArrayList; import java.util.List; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import com.bill.springrest.model.User; import com.bill.springrest.model.UserList; @Controller @RequestMapping("/rest/user") public class UserController { @RequestMapping(method=RequestMethod.GET) public @ResponseBody String demo() { return "helloword"; } @RequestMapping(method=RequestMethod.GET, value="/{userId}", headers="Accept=application/json,application/xml") public @ResponseBody User getUser(@PathVariable int userId) { System.out.println("userId is: " + userId); User user = new User(); //just for demo, no db touched user.setUserId(userId); user.setUserName("Bill"); return user; } @RequestMapping(method=RequestMethod.POST) public @ResponseBody void putUser(@RequestBody User user) { if (user != null) { System.out.println("userId: " + user.getUserId()); System.out.println("userName: " + user.getUserName()); } } @RequestMapping(method=RequestMethod.GET, value="/all", headers="Accept=application/json,application/xml") public @ResponseBody UserList getUserList() { List<User> userList = new ArrayList<User>(); User user1 = new User(); //just for demo, no db touched user1.setUserId(1); user1.setUserName("Bill"); userList.add(user1); User user2 = new User(); user2.setUserId(2); user2.setUserName("John"); userList.add(user2); UserList userListFinal = new UserList(userList); return userListFinal; } }