Spring boot使用JPA註解@CreatedDate、@CreatedBy、@LastModifiedDate、@LastModifiedBy 自動生成

實體類：

在類上加上註解@EntityListeners(AuditingEntityListener.class)

相關屬性上使用@CreatedDate、@CreatedBy、@LastModifiedDate、@LastModifiedBy註解

@Data
@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
@JsonIgnoreProperties(value={"hibernateLazyInitializer","handler","fieldHandler"})
public abstract class BaseEntity implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    @TableId
    @ApiModelProperty(value = "唯一標識")
    private String id = String.valueOf(SnowFlakeUtil.getFlowIdInstance().nextId());

    @ApiModelProperty(value = "創建者")
    @CreatedBy
    private String createBy;

    @CreatedDate
    @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @ApiModelProperty(value = "創建時間")
    private Date createTime;

    @ApiModelProperty(value = "更新者")
    @LastModifiedBy
    private String updateBy;

    @LastModifiedDate
    @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @ApiModelProperty(value = "更新時間")
    private Date updateTime;

    @ApiModelProperty(value = "刪除標誌 默認0")
    private Integer delFlag = CommonConstant.STATUS_NORMAL;
}

啓動類：

啓動類使用@EnableJpaAuditing啓用JPA審計，此時時間字段已經可以賦值。

// 啓用JPA審計
@EnableJpaAuditing
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication .class, args);
    }
}

 實現AuditorAware接口：

自定義配置類實現AuditorAware接口，重寫getCurrentAuditor方法，給CreatedBy和LastModifiedBy賦值。本代碼使用的是Security安全框架，所以通過Security即可獲取用戶名。

@Configuration
public class UserAuditor implements AuditorAware<String> {

    @Override
    public Optional<String> getCurrentAuditor() {

        UserDetails user;
        try {
            user = (UserDetails) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
            return Optional.ofNullable(user.getUsername());
        }catch (Exception e){
            return Optional.empty();
        }
    }
}