你要設(shè)置這兩個主鍵的話，需要把這兩個主鍵單獨放到一個主鍵類中啊，親，例如下面這樣：

/*
?*?學生主鍵類
?*/
@Embeddable
public?class?StudentPk?implements?Serializable{
????
????/**
?????*?生成一個版本序列號
?????*/
????private?static?final?long?serialVersionUID?=?1L;
????
????//身份證Id號碼
????@Column(length=18)
????private?String?personId;?
????
????//學號
????@Column(length=8)
????private?String?studentId;
????
????public?StudentPk()?{
????????super();
????}

????public?StudentPk(String?personId,?String?studentId)?{
????????super();
????????this.personId?=?personId;
????????this.studentId?=?studentId;
????}

????public?String?getPersonId()?{
????????return?personId;
????}

????public?void?setPersonId(String?personId)?{
????????this.personId?=?personId;
????}

????public?String?getStudentId()?{
????????return?studentId;
????}

????public?void?setStudentId(String?studentId)?{
????????this.studentId?=?studentId;
????}

????@Override
????public?int?hashCode()?{
????????//?TODO?Auto-generated?method?stub
????????return?super.hashCode();
????}

????@Override
????public?boolean?equals(Object?obj)?{
????????//?TODO?Auto-generated?method?stub
????????return?super.equals(obj);
????}
????

}

最后在實體類中寫，如下：

@EmbeddedId
????private?StudentPk?pk;
?public?StudentPk?getStudentPk()?{
????????return?pk;
????}

????public?void?setStudentPk(StudentPk?pk)?{
????????this.pk?=?pk;
????}

你再去調(diào)試調(diào)試，祝你成功，學有所成，步步高升，開開心心，啦啦啦啦啦~~