如何使用hibernate生成自定义Id，而它必须是表的主键

Here is my pojo class

这是我的pojo课。

@Entity

public class Department {


@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)

@Column(name="Department_Id")

private Integer deptId;


@Column(name="Department_Name",unique=true,nullable=false)
private String deptName;


@Column(name="Department_Description")
@NotNull
private String deptDesc;
   //geters and setters
@Entity

p