Hibernate的编程细节——事务回滚

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一事务回滚代码

private static void updateEmp() {                //修改用户                //获取一个会话                /*                Session session=MySessionFactory.getSessionFactory().openSession();                Transaction transaction=session.beginTransaction();                //修改用户                //1、获取要修改的用户                //load是通过主键属性，获取对象实例<-------->表的记录对应                Employee employee =(Employee)session.load(Employee.class, 1);//select语句                //2、修改                employee.setName("xiaoming");//update                employee.setEmail("abc@22.com");                int i=9/0;                transaction.commit();                session.close();                 */                //优化上面的代码，如何在Hibernate中回滚事务                Session session=MySessionFactory.getSessionFactory().openSession();                Transaction transaction=null;                try{                        transaction=session.beginTransaction();                        Employee employee =(Employee)session.load(Employee.class, 1);//select语句                        employee.setName("xiaoming");//update                        employee.setEmail("abc@22.com");                        int i=9/0;    //构造异常                        transaction.commit();                }                catch(Exception e){                        if(transaction!=null){                                transaction.rollback();                        }                        throw new RuntimeException(e.getMessage());                }finally{                        if(session!=null&&session.isOpen()){                                session.close();                        }                }

二测试结果

Exception in thread "main"java.lang.RuntimeException

at com.cakin.view.TestMain.updateEmp(TestMain.java:66)

at com.cakin.view.TestMain.main(TestMain.java:20)

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