【Hibernate学习笔记-5】@Formula注解的使用

ORM映射关系：注解方式

package org.crazyit.app.domain;

import javax.persistence.*;
import org.hibernate.annotations.Formula;

@Entity(name="news_inf")
public class News
{
	// 消息类的标识属性
	@Id
	@GeneratedValue(strategy=GenerationType.IDENTITY)
	private Integer id;
	// 消息标题
	private String title;
	// 消息内容
	private String content;
	// 消息全部内容，由系统根据公式生成
	@Formula("(select concat(nt.title,nt.content)"
		+ "from news_inf nt where nt.id= id)")
	private String fullContent;

	// id的setter和getter方法
	public void setId(Integer id)
	{
		this.id = id;
	}
	public Integer getId()
	{
		return this.id;
	}

	// title的setter和getter方法
	public void setTitle(String title)
	{
		this.title = title;
	}
	public String getTitle()
	{
		return this.title;
	}

	// content的setter和getter方法
	public void setContent(String content)
	{
		this.content = content;
	}
	public String getContent()
	{
		return this.content;
	}

	// fullContent的setter和getter方法
	public void setFullContent(String fullContent)
	{
		this.fullContent = fullContent;
	}
	public String getFullContent()
	{
		return this.fullContent;
	}
}

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主函数

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