package com.bjsxt.hibernate;

import java.util.HashSet;

import java.util.Set;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.ManyToMany;

@Entity

public class Student {

    private int id;

    private String name;

    private Set<Teacher> teachers = new HashSet<Teacher>();

    @ManyToMany(mappedBy="students")

    public Set<Teacher> getTeachers() {

        return teachers;

    }

    public void setTeachers(Set<Teacher> teachers) {

        this.teachers = teachers;

    }

    @Id

    @GeneratedValue

    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;

    }

}

 

 

package com.bjsxt.hibernate;

import java.util.HashSet;

import java.util.Set;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.JoinColumn;

import javax.persistence.JoinTable;

import javax.persistence.ManyToMany;

import javax.persistence.OneToMany;

import javax.persistence.Table;

@Entity

public class Teacher {

    private int id;

    private String name;

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

    @Id

    @GeneratedValue

    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;

    }

    @ManyToMany

    @JoinTable(name="t_s",

        joinColumns={@JoinColumn(name="teacher_id")},

        inverseJoinColumns={@JoinColumn(name="student_id")}

        )

    public Set<Student> getStudents() {

        return students;

    }

    public void setStudents(Set<Student> students) {

        this.students = students;

    }

}

 

 

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

        ">

<hibernate-mapping>

    <class name="com.bjsxt.hibernate.Student">

        <id name="id">

            <generator class="native"></generator>

        </id>

       

        <property name="name"></property>

        <set name="teachers" table="t_s">

            <key column="student_id"></key>

            <many-to-many class="com.bjsxt.hibernate.Teacher" column="teacher_id"/>

        </set>

    </class>

   

</hibernate-mapping>

 

 

 

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

        ">

<hibernate-mapping>

    <class name="com.bjsxt.hibernate.Teacher">

        <id name="id">

            <generator class="native"></generator>

        </id>

       

        <property name="name"></property>

        <set name="students" table="t_s">

            <key column="teacher_id"></key>

            <many-to-many class="com.bjsxt.hibernate.Student" column="student_id"/>

        </set>

    </class>

   

</hibernate-mapping>