email.java

Hibernate基础教程一书源码.Hibernate是一个持久层开源框架

package com.hibernatebook.associations;

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

@Entity
public class Email {

    private Integer id;
    private Message message;
    private String title;

    public Email(String title) {
        this.title = title;
    }
    
    Email() {
    }
    
    @Id
    @GeneratedValue
    public Integer getId() {
        return id;
    }

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

    @OneToOne(optional=true)
    public Message getMessage() {
        return message;
    }

    public void setMessage(Message message) {
        this.message = message;
    }
    
    public String toString() {
        return this.title;
    }
    
    public String getTitle() {
        return this.title;
    }
    
    public void setTitle(String title) {
        this.title = title;
    }
}