完成UserService、UserMapper编写，通过单元测试

src/main/java/cn/mafangui/hotel/service/UserService.java

@@ -7,18 +7,18 @@ import java.util.List;
 
 public interface UserService {
 
-    User selectById(int id);
+    User selectById(int userId);
 
-    int register(User user);
+    int insertUser(User user);
 
-    User login(String userName, String password);
+    int deleteUser(int userId);
 
-    User selectByUserName(String userName);
+    int updateUser(User user);
 
-//    int count();
-//
-//    List<User> findAll();
-//
-//    int updateProfile(User user);
+    User selectByUsernameAndPassword(String username, String password);
+
+    User selectByUsername(String username);
+
+    List<User> selectAll();
 
 }

src/main/java/cn/mafangui/hotel/service/impl/UserServiceImpl.java

@@ -0,0 +1,50 @@
+package cn.mafangui.hotel.service.impl;
+
+import cn.mafangui.hotel.entity.User;
+import cn.mafangui.hotel.mapper.UserMapper;
+import cn.mafangui.hotel.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+    @Autowired
+    private UserMapper userMapper;
+
+    @Override
+    public User selectById(int userId) {
+        return userMapper.selectByPrimaryKey(userId);
+    }
+
+    @Override
+    public int insertUser(User user) {
+        return userMapper.insertSelective(user);
+    }
+
+    @Override
+    public int deleteUser(int userId) {
+        return userMapper.deleteByPrimaryKey(userId);
+    }
+
+    @Override
+    public int updateUser(User user) {
+        return userMapper.updateByPrimaryKeySelective(user);
+    }
+
+    @Override
+    public User selectByUsernameAndPassword(String username, String password) {
+        return userMapper.selectByUsernameAndPassword(username,password);
+    }
+
+    @Override
+    public User selectByUsername(String username) {
+        return userMapper.selectByUsername(username);
+    }
+
+    @Override
+    public List<User> selectAll() {
+        return userMapper.selectAll();
+    }
+}