在實體類的那個欄位上新增
@Column(nullable=true,columnDefinition="timestamp default current_timestamp")
小示例:

@Entity
@Table(name="person_inf")
public class Person {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int id;

    private String name;

    @Column(nullable=true,columnDefinition="timestamp default current_timestamp"
 
)
    private Date birth;
    //省略set和get
}

測試程式碼

        Session session = DBTool.getSession();
        session.beginTransaction();
        for(int i = 0; i < 10; i++) {
            Person person = new Person();
            person.setName("第" + i + "個人");
            System.out.println(System.currentTimeMillis
 
());
            session.save(person);
        }
        session.getTransaction().commit();

執行效果

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