jpa實體使用

表sql: 

CREATE TABLE `cc_xing` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `status` tinyint(4) DEFAULT '1',
  `type` int(2) DEFAULT '3',
  `count` int(2) NOT NULL DEFAULT '2',
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `update_time` datetime DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
  `is_deleted` bit(1) NOT NULL DEFAULT b'0',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

實體類

package com.dipont.service.cc.entity;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.annotations.SQLDelete;
import org.hibernate.annotations.Where;

@Entity
@SQLDelete(sql = "update cc_xing set is_deleted = 1 where id = ?")
@Where(clause = "is_deleted = 0")
@Table(name = "cc_xing")
public class XingEntity {
    private Long id;
    private int status;
    private byte type;
    private int count;
    private Date createTime;
    private Date updateTime;
    private boolean deleted;

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Long getId() {
        return id;
    }

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

    @Column(name = "status", insertable = false)
    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    @Column(name = "type", insertable = false)
    public byte getType() {
        return type;
    }

    public void setType(byte type) {
        this.type = type;
    }

    @Column(name = "count", insertable = false)
    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    @Column(name = "create_time", insertable = false, updatable = false)
    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    @Column(name = "update_time", insertable = false, updatable = false)
    public Date getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }

    @Column(name = "is_deleted", insertable = false)
    public boolean getDeleted() {
        return deleted;
    }

    public void setDeleted(boolean deleted) {
        this.deleted = deleted;
    }
}

注意： 當sql 中有默認值的時候，
1. 咱們若是是建立實體對象，那麼save(entity) 會按照默認的值進行設置值，而不會按照咱們本身設置的

2. 當咱們更新實體對象時，這個時候咱們設置值是有效的