Hibernate框架：一对一映射

//配置一对一关系，先选好主控方，也就是Student控制StudentLogin

Student.java

StuentLogin.java

package com.qingke.easyjava.hibernate.bean;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.Table;
@Table(name ="studentt")
@Entity
publicclassStudent{
@Id
@Column(name ="id")
privateint id;
@Column(name ="sid")
privateint sid;
@Column(name ="gender")
privateString gender;
@Column(name ="first_name")
privateString firstname;
@Column(name ="last_name")
privateString lastname;
@Column(name ="phone")
privateString phone;
@Column(name ="height")
privateint height;
@Column(name ="date_of_birth")
privateDate date_of_birth;
@OneToOne
@PrimaryKeyJoinColumn
privateStudentLogin login;
publicStudent(){
super();
}
publicint getId(){
return id;
}
publicDate getDate_of_birth(){
return date_of_birth;
}
publicvoid setDate_of_birth(Date date_of_birth){
this.date_of_birth = date_of_birth;
}
publicvoid setId(int id){
this.id = id;
}
publicint getSid(){
return sid;
}
publicvoid setSid(int sid){
this.sid = sid;
}
publicString getGender(){
return gender;
}
publicvoid setGender(String gender){
this.gender = gender;
}
publicString getFirstname(){
return firstname;
}
publicvoid setFirstname(String firstname){
this.firstname = firstname;
}
publicString getPhone(){
return phone;
}
publicvoid setPhone(String phone){
this.phone = phone;
}
publicint getHeight(){
return height;
}
publicvoid setHeight(int height){
this.height = height;
}
publicString getLastname(){
return lastname;
}
publicvoid setLastname(String lastname){
this.lastname = lastname;
}
publicStudentLogin getLogin(){
return login;
}
publicvoid setLogin(StudentLogin login){
this.login = login;
}
@Override
publicString toString(){
return"Student [id: "+ id +", sid: "+ sid +", gende: "+ gender +", firstname:　"+ firstname +", lastname："
+ lastname +", phone：　"+ phone +", height：　"+ height +", date_of_birth：　"+ date_of_birth +"]";
}
}

 1 package com.qingke.easyjava.hibernate.bean;
 2 import javax.persistence.Column;
 3 import javax.persistence.Entity;
 4 import javax.persistence.Id;
 5 import javax.persistence.OneToOne;
 6 import javax.persistence.Table;
 7 @Table(name ="student_login")
 8 @Entity
 9 publicclassStudentLogin{
10 @Id
11 @Column(name ="id")
12 privateint id;
13 @Column(name ="username")
14 privateString username;
15 @Column(name ="password")
16 privateString password;
17 @OneToOne(mappedBy ="login")
18 privateStudent student;
19 publicStudentLogin(){
20 }
21 publicint getId(){
22 return id;
23 }
24 publicvoid setId(int id){
25 this.id = id;
26 }
27 publicString getUsername(){
28 return username;
29 }
30 publicvoid setUsername(String username){
31 this.username = username;
32 }
33 publicString getPassword(){
34 return password;
35 }
36 publicvoid setPassword(String password){
37 this.password = password;
38 }
39 publicString toString(){
40 return"[id:"+ id +", username: "+ username +", password: "+ password +"]";
41 }
42 }

 1 package com.qingke.easyjava.hibernate;
 2 import org.hibernate.Session;
 3 import org.hibernate.SessionFactory;
 4 import org.hibernate.cfg.Configuration;
 5 import com.qingke.easyjava.hibernate.bean.Student;
 6 import com.qingke.easyjava.hibernate.dao.StudentDao;
 7 publicclassHibernateMappingApp{
 8 publicstaticvoid main(String[] args){
 9 SessionFactory sf =
10 newConfiguration().configure().buildSessionFactory();
11 Session session = sf.openSession();
12 StudentDao dao =newStudentDao(session);
13 //配置一对一关系，先选好主控方，也就是Student控制StudentLogin
14 Student student = dao.getStudentById(5);
15 System.out.println("Student:"+ student);
16 System.out.println("Student_Login:"+ student.getLogin());
17 session.close();
18 sf.close();
19 }
20 }
21