Question

我是JPA的新手，我正在努力坚持一个将持续3个阶段New，Processing和Completed的实体。我希望以下时间戳相应更新

@Entity 
@Table(name = "feedertable")
@JsonIgnoreProperties(value = { "processStatus" })
 public class FeederTable {
@Id
@GeneratedValue(strategy= GenerationType.AUTO)
private String id;
private String orderID;
private String status;

@Column(name="CREATEDDATETIME",nullable = false)
private Timestamp createdDateTime;

@Column(name="PROCESSSTATUS",nullable = false)
private String processStatus;

@Column(name="HOSTNAME",nullable = true)
private String hostName;

//@Temporal(TemporalType.TIMESTAMP)
@Column(name="PROCESSINGDATETIME",nullable = false)
private Timestamp processingDateTime;

@Column(name="COMPLETEDDATETIME",nullable = false)
private Timestamp completedDateTime; public String getId() {
    return id;
}

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

public String getOrderID() {
    return orderID;
}

public void setOrderID(String orderID) {
    this.orderID = orderID;
}

public String getStatus() {
    return status;
}

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

public Timestamp getCreatedDateTime() {
    return createdDateTime;
}

public void setCreatedDateTime(Timestamp createdDateTime) {
    this.createdDateTime = createdDateTime;
}

public String getProcessStatus() {
    return processStatus;
}

public void setProcessStatus(String processStatus) {
    this.processStatus = processStatus;
}

public String getHostName() {
    return hostName;
}

public void setHostName(String hostName) {
    this.hostName = hostName;
}

public Timestamp getProcessingDateTime() {
    return processingDateTime;
}

public void setProcessingDateTime(Timestamp processingDateTime) {
    this.processingDateTime = processingDateTime;
}

public Timestamp getCompletedDateTime() {
    return completedDateTime;
}

public void setCompletedDateTime(Timestamp completedDateTime) {
    this.completedDateTime = completedDateTime;
}

@Override
public String toString() {
    return "FeederTable{" +
            "id='" + id + '\'' +
            ", orderID='" + orderID + '\'' +
            ", status='" + status + '\'' +
            ", createdDateTime=" + createdDateTime +
            ", processStatus='" + processStatus + '\'' +
            ", hostName='" + hostName + '\'' +
            ", processingDateTime=" + processingDateTime +
            ", completedDateTime=" + completedDateTime +
            '}';
}

坚持使用JPARepository：

FeederTable feederTable = new FeederTable(); 
feederTable.setOrderID(orderId);
 feederTable.setStatus(status);
 feederTable.setCreatedDateTime(new Timestamp(format.getTime())); feederTable.setProcessStatus("New");
 feederTable.setHostName(hostname); 
feederTable.setCompletedDateTime(null); 
feederTable.setProcessingDateTime(null);
 repository.save(feederTable);

但是，当第一次保留实体时，将填充所有时间戳。我希望PROCESSINGDATETIME和COMPLETEDDATETIME为null并仅在它达到相应状态时填充它。知道如何实现它吗？。

Answer 1

我使用@PrePersist和@PreUpdate注释在我的项目中做了类似的事情。

您可以使用其他生命周期钩子。阅读他们here。

MyEntity{

    @Temporal(TemporalType.TIMESTAMP)
    private Date creationDate;

    @Temporal(TemporalType.TIMESTAMP)
    private Date updationDate;

    @PrePersist
    public void onCreate() {
        creationDate = new Date();
    }

    @PreUpdate
    public void onUpdate() {
        updationDate = new Date();
    }
}

我是否正确理解了您的问题？这是你在找什么？

JPA如何设置修改日期和完成日期NULL

1 个答案: