Hibernate之多对多

一、项目结构如下图

Hibernate之多对多

二、保存学生和课程及其学生选课关系代码如下（测试类中不能再有双向关联，否则会报错，因为，都维护了中间表外键，会有中间表外键冲突，如果非要写双向关联，就需要配置中设置某一方维护主键，课程和学生映射配置文件中相应配置inverse为true和false）

package com.hjp.manytomany;

import java.util.HashSet;
import java.util.Set;

/**
 * Created by JiaPeng on 2016/1/2.
 */
public class Course {
    private int id;
    private String name;

    public Set<Student> getStudentSet() {
        return studentSet;
    }

    public void setStudentSet(Set<Student> studentSet) {
        this.studentSet = studentSet;
    }

    private Set<Student> studentSet = new HashSet<Student>();

    @Override
    public String toString() {
        return "Course{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }

    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;
    }
}

Course