1. Create three databases, namely the student table, the course selection table, and the course table.
1. Create a student table:
2. Create a course selection table:
3. Create a course table:
2. Create an entity class corresponding to the database table
(1) Create a student entity class
package net.tjl.mybatis.bean;
/**
* 功能：学生实体类
* 作者：谭金兰
* 日期：2021年03月10日
*/
public class Student {
private int id;
private String name;
private String gender;
private int age;
private Score score;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Score getScore() {
return score;
}
public void setScore(Score score) {
this.score = score;
}
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", gender='" + gender + '\'' +
", age=" + age +
", Score=" + score.getName() +
'}';
}
}
(2) Create an entity class for elective courses
package net.tjl.mybatis.bean;
public class Sc {
private int id;
private String number;
private float grade;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
@Override
public String toString() {
return "Sc{" +
"id=" + id +
", number='" + number + '\'' +
"grade=" +grade+
'}';
}
}
(3) Create a course entity class
package net.tjl.mybatis.bean;
import java.util.List;
public class Score {
private int id;
private String name;
private Score score;
private List<Student> students;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Score getScore() {
return score;
}
public void setScore(Score score) {
this.score = score;
}
public List<Student> getStudents() {
return students;
}
public void setStudents(List<Student> students) {
this.students = students;
}
@Override
public String toString() {
return "Score{" +
"id=" + id +
", name='" + name + '\'' +
", score=" + score.getName() +
", students=" + students +
'}';
}
}