public class Test1 {        public static void main(String[] args) {        Class clazz=Student.class;        System.out.println(clazz);    }     Session session;     Transaction tx;     @Before     public void initData(){         session = HibernateUtil.getSession();         tx= session.beginTransaction();     }        @After        public void endTest(){                tx.commit();         HibernateUtil.getSession();    }        //添加数据     @Test      public void testAdd(){          //1.1构建一个学生对象          Student stu=new Student();          stu.setAge(22);          stu.setName("金龙");          stu.setId(8);                   Configuration cf=new Configuration().configure("hibernate.cfg.xml");          SessionFactory factory = cf.buildSessionFactory();         session = factory.openSession();           tx = session.beginTransaction();          //1.3保存             session.save(stu);         }               //检索所有列     @Test     public void AllColumn(){         session = HibernateUtil.getSession();         String hql="from Student";          Query query=session.createQuery(hql);         List<Student>list=query.list();         for (Student student : list) {            System.out.println(student);        }                                }               //检索某些列     @Test     public void someColumn(){                  session = HibernateUtil.getSession();         String hql="select name,age from Student";          Query query=session.createQuery(hql);         List<Object[]>list=query.list();        for (Object[] item : list) {            System.out.println(((Student)item[0]));        }        }          @Test     public void  LoadTest(){                 Student stu=(Student)session.load(Student.class, 3);        System.out.println(stu);                            }               //删除数据     @Test        public void delTest(){                         Student stu=new Student();             stu.setId(3);             session.delete(stu);                         System.out.println("del ok!");        }                    @Test        public void getTest(){             Student stu=(Student)session.get(Student.class, 3);             System.out.println("=============");             Student stu2=(Student)session.load(Student.class, 3);                                 }               //有名称占位符     @Test     public void named(){         session = HibernateUtil.getSession();         String hql="from Student where name=:name";          Query query=session.createQuery(hql);                  query.setParameter("name","金龙");          List<Student>list=query.list();         for (Student item : list) {                         System.out.println(item.getName());        }     }               //模糊查询     @Test        public void likeTest(){            String hql="from Student where name like ‘%金%‘";            Query query = session.createQuery(hql);                        List<Student> list = query.list();                        for (Student item : list) {                            System.out.println(item.getName());            }        }               //动态加载   @Test   public void dynamicSelectTest(){                StudentCondition condition=new StudentCondition();        condition.setAge(22);        condition.setName("金龙");                StringBuilder sb=new StringBuilder();        sb.append("from Student where 1=1 ");        Student stu=new Student();                if (condition.getAge()!=null) {            sb.append(" and age=:age");            stu.setAge(condition.getAge());        }                if(condition.getName()!=null){            sb.append(" and name=:name");            stu.setName(condition.getName());        }                Query query=session.createQuery(sb.toString());        List<Student> list = query.list();              for (Student item : list) {                  System.out.println(item.getName()+item.getAge());        }    }            //匿名占位符     @Test     public void anonymous (){         session = HibernateUtil.getSession();         String hql="from Student where name=？";          Query query=session.createQuery(hql);                  query.setParameter(0,"金龙");          List<Student>list=query.list();         for (Student item : list) {                         System.out.println(item.getName());        }     }         }