java - 如何将 Long id new java.util.Date().getTime() 设置为 @GenerateValue

Question

如何将主键 Long id = new java.util.Date().getTime() 设置为 @GenerateValue？

我的一段代码:

private Long id;
@Id
    @GeneratedValue(generator = "increment")
    @GenericGenerator(name = "increment", strategy = "increment")
    @Column(nullable = false, name = "id")
    public Long getId() {
        return id;
    }

谢谢。

Answer 1

您尝试使用自定义生成器怎么样；

package x.y.z;
public class LongGenerator implements IdentifierGenerator { 

        @Override 
        public Serializable generate(final SessionImplementor sessionImplementor, final Object object) throws HibernateException { 
            return new java.util.Date().getTime(); 
        }
}

和:

    private Long id;
    @Id
    @GeneratedValue(generator = "increment")
    @GenericGenerator(name = "increment", strategy = "x.y.z.LongGenerator")
    @Column(nullable = false, name = "id")
    public Long getId() {
        return id;
    }