@ManyToOne 和@oneToMany中@@JoinColumn的区别

@ManyToOne中是在本类对应的数据库表中生成

例如

 @Entity
 @Table(name="score")
 public class Score {
     private int id;
     private Student student;
     private Course sourse;
     @Id
     @GeneratedValue
     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     @ManyToOne
     @JoinColumn(name="student_id")
     public Student getStudent() {
         return student;
     }
     public void setStudent(Student student) {
         this.student = student;
     }
     @ManyToOne
     @JoinColumn(name="course_id")
     public Course getSourse() {
         return sourse;
     }
     public void setSourse(Course sourse) {
         this.sourse = sourse;
     }

 }

其中student_id和course_Id都是在score中生成的

 

 

而@oneToMany中是在多的一方生成对应一方面的ID         (@oneToOne 不常用)

转载的url:  http://blog.csdn.net/angryant/article/details/5495810