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ORM映射关系:注解方式
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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;
}
}
主函数
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