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接上一篇博客：http://www.cnblogs.com/tengpan-cn/p/5551323.html
添加主键类，注意必须实现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; }
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; } @Id public String getSchoolName() { return schoolName; } public void setSchoolName(String schoolName) { this.schoolName = schoolName; } @Id public int getId() { return id; } public void setId(int id) { this.id = id; } }
生成表的语句：
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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原文地址：http://www.cnblogs.com/tengpan-cn/p/5551480.html
