hibernate annotation 组件映射

让Customer从属于Users这一张表，即让Customer属于Users表的一部分，用Embedded注解,意思为“嵌入的”，注意只有一个id。

代码如下：

[Customer]

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToOne;

@Entity
public class Customer {

 private String customername;
 public String getCustomername() {
  return customername;
 }

 

 public void setCustomername(String customername) {
  this.customername = customername;
 }

 

 private String password;
 
 
 

 public String getPassword() {
  return password;
 }
 
 

 public void setPassword(String password) {
  this.password = password;
 }
 
}

[Users]

import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

@Entity

public class Users {
 private int id;
 private String level;
 private String title;
 private Customer customer;
 
 @Embedded
 public Customer getCustomer() {
  return customer;
 }
 public void setCustomer(Customer customer) {
  this.customer = customer;
 }
 @Id
 @GeneratedValue
 public int getId() {
  return id;
 }
 public String getLevel() {
  return level;
 }
 public String getTitle() {
  return title;
 }
 public void setId(int id) {
  this.id = id;
 }
 public void setLevel(String level) {
  this.level = level;
 }
 public void setTitle(String title) {
  this.title = title;
 }
 
}

 

[test]

public class testUsers {

 @Test
 public void testSchemaExport() {
//  SessionFactory sessionFactory = new AnnotationConfiguration()
//    .configure().buildSessionFactory();
  SchemaExport export = new SchemaExport(
    new AnnotationConfiguration().configure());
  export.create(true, false);
//  Session session = sessionFactory.getCurrentSession();
//  session.beginTransaction();
//  session.getTransaction().commit();

 }

}