设置日期时无法保存实体

Question

I'm using Spring Boot with JPA and Lombok. My Sample entity contains four dates, the approved date, sample date, and a createdAt and modifiedAt that is maintained by JPA itself with the Auditable class. JPA manages the schema, database running MySQL and all the date columns are DateTime . All Dates are of class java.util.Date .

Sample entity (simplified for reasons)

@Entity
@Data
@EqualsAndHashCode(callSuper = false)
public class Sample extends Auditable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    Integer id;

    Date approved;

    @DateTimeFormat(pattern = "yyyy-MM-dd'T'H:m")
    Date sampleDate;
}

The DateTimeFormat on the sampleDate is to help Spring convert form-data to a java.util.Date .

Auditable.java

@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
public class Auditable {

    @CreatedDate
    @Column(name = "created_at", updatable = false, nullable = false)
    @Temporal(TemporalType.TIMESTAMP)
    private Date createdAt;

    @LastModifiedDate
    @Column(name = "modified_at")
    @Temporal(TemporalType.TIMESTAMP)
    private Date modifiedAt;
}

When my controller performs this:

Sample s = sampleRepository.getOne(id);
s.setApproved(new Date());
sampleRepository.save(s);

Spring Generates this error message:

com.mysql.cj.jdbc.exceptions.MysqlDataTruncation: Data truncation: Data too long for column 'approved' at row 1

Answer 1

You would better use LocalDateTime instead of java.util.Date or java.sql.Date , if you are doing this with java >= 8.

Audited entities' createdDate, lastModifiedDate should be set by Jpa Auditor(framework), not by client(in this context, you).

Also, you can try @Temporal(TemporalType.DATE) instead of TemporalType.TIMESTAMP if you want to keep your code.

Updated

Sorry about I missed what exact subject you raised.

Just try add @Temporal(TemporalType.DATE) above Date approved; .