hibernate联合主键

@Entity
@Table(name = "TABLE_NAME")
@IdClass(PK.class)
public class TableName implements Serializable{
    @Id
    @Column(name="ID1")
    private String id1;
    @Id
    @Column(name="ID2")
    private String id2;
    @Column(name="OTHER")
    private String other;

public class PK implements Serializable {
    private String id1;
    private String id2;
}