实体类中

import lombok.Data;
import org.hibernate.cfg.ImprovedNamingStrategy;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;import javax.persistence.*;
import java.util.Date;@Data
@Table(name = "sys_service")
@Entity
@EntityListeners(AuditingEntityListener.class)
public class SysService extends ImprovedNamingStrategy {@GeneratedValue(strategy= GenerationType.IDENTITY)@Idprivate Integer id;@Column(name = "name")private String name;@Column(name = "url")private String url;@Column(name = "path")private String path;@Column(name = "sort")private Integer sort;@CreatedDate@Column(name = "createTime",updatable = false,nullable = false)private Date createTime;@LastModifiedDate@Column(name = "updateTime",nullable = false)private Date updateTime;
}

启动类中添加注解

@EnableJpaAuditing

在插入对象时，不需要传入createTime和updateTime的值，@CreatedDate和@LastModifiedDate自动获取当前时间，再次修改时 createTime属性设置 updatable=false,值不再改变。