• hibernate注解的测试


    注解用到的jar包:下载地址



    /**

    * ========================================================================
    * 注解
    * 步骤:
    * 1.导入jar包
    * (1)hibernate-annotations.jar
    * (2)hibernate-commons-annotations.jar
    * (3)ejb3-persistence.jar
    * 2.使用注解配置持久化类级对象关联关系
    * 3.使用AnnotationConfiguration建立会话工厂
    * sessionFaction=new AnnotationConfiguration().configure().buildSessionFactory();
    * 4.在hibernate配置文件中(hibernate.cfg.xml)中生成持久化类
    * <mapping class="持久化类完整限定名">
    * ========================================================================
    *

    */

    @Test
    	public void test1(){
    		//必须先在数据库里面创建序列,名字是seq_emp_id
    		Session session=new AnnotationConfiguration()
    		                  .configure()
    		                  .buildSessionFactory()
    		                  .openSession();
    		Transaction tx=session.beginTransaction();
    		Emp1 emp1=new Emp1();
    		emp1.setEname("test2");
    		emp1.setHiredate(new Date());
    		session.save(emp1);
    		tx.commit();
    	}

    	//测试多对一的配置注解
    	@Test
    	public void test2(){
    		Session session=new AnnotationConfiguration()
    							.configure()
    							.buildSessionFactory()
    							.openSession();
    		Emp1 emp1=(Emp1) session.get(Emp1.class,7788);
    		System.out.println(emp1.getEname()+","+emp1.getDept().getDname());
    	}
    	
    	//级联操作
    	@Test
    	public void test3(){
    		Session session=new AnnotationConfiguration()
    							.configure()
    							.buildSessionFactory()
    							.openSession();
    	Transaction tx=session.beginTransaction();
    	Dept1 dept1=new Dept1(1,"产品部");
    	Emp1 emp1=new Emp1();
    	emp1.setEname("Villy");
    	emp1.setHiredate(new Date());
    	dept1.getEmps().add(emp1);
    	emp1.setDept(dept1);
    	session.save(dept1);
    	tx.commit();
    	}
    


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  • 原文地址:https://www.cnblogs.com/a1111/p/12816339.html
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