10.controller层

@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @ResponseBody
    @RequestMapping(value = "/userlist",method = RequestMethod.GET)
    public List<User> getUserList(){

        List<User> userList = userService.getUserList();


        return userList;
    }

    @ResponseBody
    @RequestMapping(value = "/user",method = RequestMethod.GET)
    public User getUser(){
        User user = userService.getUser(1);
//        String s = user.toString();

        return user;
    }
}