JPA 基础（3）—— Auditing

JPA 基础（1）—— 数据库持久化代码实战
JPA 基础（2）—— 分页操作
JPA 基础（3）—— Auditing
JPA 基础（4）—— 关联表映射

我们在创建实体类时，可以用@CreatedDate、@LastModifiedDate、@CreatedBy、@LastModifiedBy 透明地跟踪创建或更改实体的人员以及更改发生的时间。

package com.jpa.test;

import lombok.Data;
import org.springframework.data.annotation.CreatedBy;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedBy;
import org.springframework.data.annotation.LastModifiedDate;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import java.util.Date;

@Data
@Entity
@Table(name = "student")
public class StudentEntity {
    @Id
    private String no;

    @Column(name = "class_no")
    private String classNo;

    private Integer grade;
    
    @CreatedDate
    private Date createdTime;

    @LastModifiedDate
    private Date updatedTime;

    @CreatedBy
    private Date createdBy;

    @LastModifiedBy
    private Date updatedBy;
}

需要在主类加上注解@EnableJpaAuditing开启审计功能。

package com.jpa.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;

@EnableJpaAuditing
@SpringBootApplication
public class TestApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }
}