接上一篇博客：http://www.cnblogs.com/tengpan-cn/p/5551323.html

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主鍵類不需要寫任何注解，表對象類使用@IdClass注解 在表對象類前面加@IdClass(value=主鍵類名.class)然后，表對象類中也不必包含主鍵類，直接分成各個屬性即可。在多個屬性前加@ID

添加主鍵類，注意必須實現Serializable接口

package com.pt.hibernate;import java.io.Serializable;public class UnionId implements Serializable{public String getSchoolName() {return schoolName;}public void setSchoolName(String schoolName) {this.schoolName = schoolName;}public int getId() {return id;}public void setId(int id) {this.id = id;}String schoolName;int id; } UnionId.java package com.pt.hibernate;import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.IdClass;@Entity @IdClass(value=UnionId.class) public class Student {String schoolName;int id;String stuName;public String getStuName() {return stuName;}public void setStuName(String stuName) {this.stuName = stuName;}@Idpublic String getSchoolName() {return schoolName;}public void setSchoolName(String schoolName) {this.schoolName = schoolName;}@Idpublic int getId() {return id;}public void setId(int id) {this.id = id;}} Student.java

生成表的語句：

create table Student (id integer not null,schoolName varchar(255) not null,stuName varchar(255),primary key (id, schoolName)) ENGINE=InnoDB

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轉載于:https://www.cnblogs.com/tengpan-cn/p/5551480.html

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