java - 日期在应用程序中没问题，但在数据库中保存了 -2 小时

Question

我正在使用 MySQL、hibernate/JPA 和 Spring Boot。我从前端接收的数据是正确的，即使在我的后端也是完全正确的，但是当我将其保存到数据库时，它节省了-2小时。所以当上传时间为 2019-08-07 00:00 然后在数据库中保存为:2019-08-06 22:00

@Entity
public class Document {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    @Column(unique = true)
    private String name;

    private String title;

    private String description;

    @JsonIgnore
    @Column(name = "resource_path")
    private String resourcePath;

    @Column(name = "upload_datetime", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date uploadDatetime;

    @Column(name = "approval_end_time", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date approvalEndTime;

    @Column(name = "active_start_time", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date activeStartTime;

    @Column(name = "active_end_time", columnDefinition = "DATETIME")
    @Temporal(TemporalType.TIMESTAMP)
    private Date activeEndTime;

    @OneToMany(mappedBy = "document", cascade= CascadeType.ALL, orphanRemoval = true)
    private Set<UsersDocuments> documentsForUsers = new HashSet<>();

    @ManyToOne
    @JoinColumn(name="user_id")
    private User user;


Document document = new Document(title, desc);

        document.setUploadDatetime(new Date());

        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        DateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");

        String strDate = dateFormat.format(document.getUploadDatetime());
        System.out.println("ULOAD " + strDate); // writes 2019-08-07 01:07:57, but saves -2h to db


        try {
            document.setApprovalEndTime(new Date());
            document.setActiveStartTime(formatter.parse(startOfReading));
            document.setActiveEndTime(formatter.parse(endOfReading));
        } catch (ParseException e){

        }

spring.jpa.properties.hibernate.jdbc.time_zone=UTC

Answer 1

尝试在格式化程序中设置时区。

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
dateFormat.setTimeZone(java.util.TimeZone.getTimeZone("UTC"));