慕斯卡3215842

利用本文中的资源以及从不同来源获得的左右信息，我提出了这个优雅的解决方案，创建了以下抽象类import java.util.Date;import javax.persistence.Column;import javax.persistence.MappedSuperclass;import javax.persistence.PrePersist;import javax.persistence.PreUpdate;import javax.persistence.Temporal;import javax.persistence.TemporalType;@MappedSuperclasspublic abstract class AbstractTimestampEntity {    @Temporal(TemporalType.TIMESTAMP)    @Column(name = "created", nullable = false)    private Date created;    @Temporal(TemporalType.TIMESTAMP)    @Column(name = "updated", nullable = false)    private Date updated;    @PrePersist    protected void onCreate() {    updated = created = new Date();    }    @PreUpdate    protected void onUpdate() {    updated = new Date();    }}并让您的所有实体对其进行扩展，例如：@Entity@Table(name = "campaign")public class Campaign extends AbstractTimestampEntity implements Serializable {...}