hibernate-关系映射-多对多（单向）-11

一个老师对应多个学生，一个学生对应多个老师
数据库设计： 学生表，老师表，中间表（t_id,s_id）
annotation方式：

@Entitypublic class Teacher {    private int id;    private Set<Student> students = new HashSet<Student>();    @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;    }    @Id    @GeneratedValue    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }}

@Entitypublic class Student {    private int id;    @Id    @GeneratedValue    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }}

xml方式：

<hibernate-mapping package="hibernate">    <class name="hibernate.Teacher">        <id name="id" >            <generator class="native"/>        </id>        <set name="students" table="t_s">            <key column="teacher_id"></key>            <many-to-many class="hibernate.Student" column="student_id"/>        </set>    </class></hibernate-mapping>

<hibernate-mapping package="hibernate">    <!--table 属性不配就是默认-->    <class name="hibernate.Student" >        <id name="id" >            <generator class="native"/>        </id>    </class></hibernate-mapping>