12.4

package com.example.mapper;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface UserMapper {
    @Select("select count(*) from choice.user where UserName = #{username} and Password = #{password} and Position like concat('%', #{position}, '%')")
    int getByUser(@Param("username") String username, @Param("password") String password, @Param("position") String position);

    @Insert("insert into user(UserName, Password, Position) VALUES (#{username}, #{password}, #{position})")
    void add(String username, String password, String position);

    @Insert("insert into teacher(TeacherID,TeacherName,TeacherSex,TeacherCollege,Position) VALUES (#{teacherID},#{teacherName},#{teacherSex},#{teacherCollege},#{position})")
    void addTea(String teacherID, String teacherName, String teacherSex, String teacherCollege, String position);

    @Insert("INSERT INTO student(StudentID, StudentName, StudentSex, StudentClass, StudentMajor) VALUES (#{studentID},#{studentName},#{studentSex},#{studentClass},#{studentMajor})")
    void addStu(String studentID, String studentName, String studentSex, String studentClass, String studentMajor);
}

package com.example.mapper;

import com.example.pojo.Course;
import com.example.pojo.Information;
import com.example.pojo.Teacher;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface TeacherMapper {
    @Select("select * from teacher where TeacherID=#{username}")
    Teacher getName(String username);

    @Insert("insert into course(CourseID, CourseName, CourseCount, Courseteacher,Count) VALUES (#{courseID},#{courseName},#{courseCount},#{courseTeacher},#{count})")
    void addCourse(String courseID, String courseName, int courseCount, String courseTeacher, int count);

    @Update("update teacher set TeacherName=#{teacherName},TeacherSex=#{teacherSex},TeacherCollege=#{teacherCollege},Position=#{position} where TeacherID=#{teacherID}")
    void updateTea(String teacherID, String teacherName, String teacherSex, String teacherCollege, String position);

    @Select("select * from teacher where TeacherName=#{name}")
    Teacher getByName(String name);

    @Select("select * from teacher where TeacherID=#{username}")
    Teacher getAll(String username);

    @Select("select * from course where CourseTeacher=#{name}")
    List<Course> getCourse(String name);
}

package com.example.mapper;

import com.example.pojo.Course;
import com.example.pojo.Information;
import com.example.pojo.Student;
import com.example.pojo.Teacher;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface StudentMapper {
    @Select("select * from choice.student where StudentID=#{username}")
    Student getName(String username);

    @Update("update choice.student set StudentName=#{studentName},StudentSex=#{studentSex},StudentClass=#{studentClass},StudentMajor=#{studentMajor} where StudentID=#{studentID}")
    void update(String studentID, String studentName, String studentSex, String studentClass, String studentMajor);

    @Select("select * from choice.course where CourseID=#{name}")
    Course selectCourse(String name);

    @Select("select * from choice.teacher where TeacherName=#{name}")
    Teacher selectAll(String name);

    @Select("SELECT * from choice.course")
    List<Course> select();

    @Insert("insert into choice.information(CourseID, TeacherID, StudentID) VALUES (#{courseID},#{teacherID},#{studentID})")
    void choose1(String courseID, String teacherID, String studentID);

    @Update("update  choice.course set Count=#{count} where CourseID=#{id}")
    void updateCourse(String id, String count);

    @Select("select * from choice.course where CourseID=#{id}")
    Course cc(String id);

    @Select("select * from choice.information where CourseID=#{id}")
    List<Information> getInformation(String name);
}