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student_system/springboot/src/main/java/com/example/mapper/StudentMapper.java

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package com.example.mapper;
import com.example.entity.Student;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import java.util.List;
public interface StudentMapper {
@Select("select * from student where username = #{username}")
Student selectByUsername(String username);
@Insert("insert into student (username, password, name, phone, email, sex, birth, avatar, role) " +
"values (#{username}, #{password}, #{name}, #{phone}, #{email}, #{sex}, #{birth}, #{avatar}, #{role})")
void insert(Student student);
@Delete("delete from student where id =#{id}")
void deleteById(Integer id);
@Update("update student set username=#{username},password=#{password},name=#{name},phone=#{phone}," +
"email=#{email},sex=#{sex},birth=#{birth},avatar=#{avatar} where id =#{id}")
void updateById(Student student);
@Select("select * from student where username like concat('%',#{username},'%')and name like concat('%',#{name},'%') order by id desc")
List<Student> selectAll(Student student);
}