時間型別

• 推薦使用：
  • 在資料庫設定時間型別時，有的使用timestamp ，有的使用datetime，個人推薦使用datetime
  • Java8後，使用LocalDateTime初始化時間，配合註解@JsonFormat格式化時間使用
• 程式碼如下

@Entity
@Table(name = "m_test")
public class TestTable implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy 
 
= GenerationType.IDENTITY)
    @Column(name = "id", columnDefinition = "BIGINT")
    private Long id;

    @Column(name = "user_name", columnDefinition = "varchar(50) NOT NULL COMMENT '使用者名稱稱'")
    private String userName;
    
    @Column(name = "address", columnDefinition = "varchar(50) NOT NULL COMMENT '使用者地址'")
    
 
private String address;
    
    @Column(name = "sex", columnDefinition = "tinyint NOT NULL'")
    private Integer sex = 0;

    @JsonFormat
    @Column(name = "cdate", columnDefinition = "DATETIME DEFAULT CURRENT_TIMESTAMP ")
    private LocalDateTime cdate = LocalDateTime.now();

    @JsonFormat
    @Column(name = "mdate", columnDefinition = "DATETIME DEFAULT CURRENT_TIMESTAMP ")
    private LocalDateTime mdate =
 
 LocalDateTime.now();

}