hibernate学习笔记15

最新推荐文章于 2022-09-05 00:29:31 发布

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本文介绍了一个使用Java ORM框架的例子，展示了如何定义Person、Student及Teacher等实体类，并通过Session进行对象的持久化操作。

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@Entity
@Inheritance(strategy=InheritanceType.JOINED)

public class Person {
   private int id;
   private String name;

   @Id
   @GeneratedValue
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }

}

@Entity
public class Student extends Person {

   private int score;

   public int getScore() {
       return score;
   }

   public void setScore(int score) {
       this.score = score;
   }

}

@Entity
public class Teacher extends Person {
   private String title;

   public String getTitle() {
       return title;
   }

   public void setTitle(String title) {
       this.title = title;
   }


}

Student s = new Student();
       s.setName("s1");
       s.setScore(80);
       Teacher t = new Teacher();
       t.setName("t1");
       t.setTitle("中级");

       Session session = sessionFactory.openSession();
       session.beginTransaction();
       session.save(s);
       session.save(t);
       session.getTransaction().commit();
       session.close();