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 

1. 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 +"]";
   }
   }
   

   　　

 

package com.qingke.easyjava.hibernate.bean;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;
@Table(name ="student_login")
@Entity
publicclassStudentLogin{
@Id
@Column(name ="id")
privateint id;
@Column(name ="username")
privateString username;
@Column(name ="password")
privateString password;
@OneToOne(mappedBy ="login")
privateStudent student;
publicStudentLogin(){
}
publicint getId(){
return id;
}
publicvoid setId(int id){
this.id = id;
}
publicString getUsername(){
return username;
}
publicvoid setUsername(String username){
this.username = username;
}
publicString getPassword(){
return password;
}
publicvoid setPassword(String password){
this.password = password;
}
publicString toString(){
return"[id:"+ id +", username: "+ username +", password: "+ password +"]";
}
}

 

 

package com.qingke.easyjava.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import com.qingke.easyjava.hibernate.bean.Student;
import com.qingke.easyjava.hibernate.dao.StudentDao;
publicclassHibernateMappingApp{
publicstaticvoid main(String[] args){
SessionFactory sf =
newConfiguration().configure().buildSessionFactory();
Session session = sf.openSession();
StudentDao dao =newStudentDao(session);
//配置一对一关系，先选好主控方，也就是Student控制StudentLogin
Student student = dao.getStudentById(5);
System.out.println("Student:"+ student);
System.out.println("Student_Login:"+ student.getLogin());
session.close();
sf.close();
}
}