Java实体类示例：使用JPA注解实现数据库映射

package com.hdfix.model;

import java.io.Serializable;
import java.util.Date;

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

import javax.persistence.Table;

@Entity
@Table(name='f_Papers')
public class Papers implements Serializable{
    private static final long serialVersionUID = -117947798302678932L;
    private int id;//主键
    private String title; //标题
    private String url; //详情描述
    private Date createtime;//用户创建的时间
    @Id
    @GeneratedValue
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public Date getCreatetime() {
        return createtime;
    }
    public void setCreatetime(Date createtime) {
        this.createtime = createtime;
    }
}

建表SQL语句:

CREATE TABLE f_Papers (
  id INT PRIMARY KEY AUTO_INCREMENT,
  title VARCHAR(255),
  url VARCHAR(255),
  createtime DATETIME
);