hibernate 注释配置双向关联

package com.jxsme.hibernate;
/*
* autho huangjin green eat 
*Oct 21, 2008
*/
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name="TEACHERS")
public class Teacher {
@Id
private int id;
@Column(name="TEACHERNAME")
private String teachername;
    @OneToMany(targetEntity=Student.class,fetch=FetchType.EAGER)
    @JoinColumn(name = "TEACHER_ID")
private Set  student= new HashSet(0);
public Set getStudent() {
return student;
}

public void setStudent(Set student) {
this.student = student;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getTeachername() {
return teachername;
}

public void setTeachername(String teachername) {
this.teachername = teachername;
}



}



package com.jxsme.hibernate;

import javax.persistence.Entity;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
/*
* autho huangjin green eat 
*Oct 21, 2008
*/
@Entity
@Table(name="STUDENTS")
public class Student {
    @Id
    //主键标实
    @GeneratedValue(strategy = GenerationType.AUTO)
    //映射主键生成策略
private int id;
    @Column(name = "STUDENTNAME")
private String sudentname;
@ManyToOne
@JoinColumn(name="TEACHER_ID")
private Teacher teacher;
public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getSudentname() {
return sudentname;
}

public void setSudentname(String sudentname) {
this.sudentname = sudentname;
}

public Teacher getTeacher() {
return teacher;
}

public void setTeacher(Teacher teacher) {
this.teacher = teacher;
}



}