mapper层代码 pojo层代码不再演示

package com.cwk.mapper;

import com.cwk.pojo.User;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface UserMapper {
@Select("select * from tb_user where username = #{username} and password = #{password}")
User select(@Param("username") String username, @Param("password") String password);

}