hibernate 主鍵利用uuid生成
@Id
@GenericGenerator(name="idGenerator", strategy="uuid") //這個是hibernate的注解
@GeneratedValue(generator="idGenerator") //使用uuid的生成政策
@Column(name = "ca001", nullable = false, length = 33)
private String id;
@Column(name = "ca002", nullable = false, length = 255)
private String department; // 承辦部門