# @Controller注解
在使用Spring的過程中，為了避免大量使用Bean注入的Xml配置文件,我們會采用Spring提供的自動掃描注入的方式,只需要添加幾行自動注入的的配置,便可以完成
Service層,Controller層等等的注入配置.使用過程中,在Service層中的實現類頭上加@Compopnet注解，在Controller類頭加@Controller注解，便完成了配置。
```
package com.cui.jack.controller;
import com.cui.jack.domain.User;
import com.cui.jack.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserRepository userRepository;
@RequestMapping(value = "/user/{id}" , method = RequestMethod.GET)
public String userFindOne(@PathVariable("id") Long id, ModelMap map){
User user = userRepository.findOne(id);
map.addAttribute("name",user.getUserName());
return "userList";
}
@RequestMapping(value = "/mob/{mobile}" , method = RequestMethod.GET)
public List<User> userFindMobile(@PathVariable("mobile") Long mob){
return userRepository.findByMobile(mob);
}
@RequestMapping(value="/users",method = RequestMethod.GET)
public String userList(ModelMap map){
List<User> list = userRepository.findAll();
map.addAttribute("list", list );
return "userList";
}
@PutMapping(value="/user/{id}")
public User userUpdate(
@PathVariable("id") Long id,
@RequestParam("mobile") Long mobile,
@RequestParam("userName") String userName){
User user = new User();
user.setId(id);
user.setUserName(userName);
user.setMobile(mobile);
return userRepository.save(user);
}
}
```
