public static void testadd() {

        Session session = HibernateUtils.openSession();//获得session

        Transaction transaction = session.beginTransaction();//开启事务

        Student student=new Student();

        student.setSname("翟");

        student.setPoint(123f);

        student.setClassno(46);

        student.setSex("男");

        student.setBirthday("2019-11-11");

        student.setPhone("18739496522");

        student.setEmail("34288334@qq.com");

        Student student1=new Student();

        student1.setSname("翟hb");

        student1.setPoint(666f);

        student1.setClassno(46);

        student1.setSex("女");

        student1.setBirthday("2019-11-11");

        student1.setPhone("18739496522");

        student1.setEmail("34288334@qq.com");

        Course course=new Course();

        course.setCourseno("123");

        course.setCname("算法设计");

        course.setType("必修");

        course.setCredit(4);

        course.setPeriod(22);

        Course course1=new Course();

        course.setCourseno("456");

        course1.setCname("网络");

        course1.setCredit(2);

        course1.setPeriod(12);

        course1.setType("必修");

        System.out.println(student);

        System.out.println(student1);

        System.out.println(course);

        System.out.println(course1);

        student.getCourses().add(course);

        student.getCourses().add(course1);

        student1.getCourses().add(course);

        student1.getCourses().add(course1);

        session.save(student);

        session.save(student1);

        session.save(course);

        session.save(course1);

        transaction.commit();//提交事务

        session.close();//关闭资源

    }

public class Student {

    private Integer studentno;

    private String sname;

    private String sex;

    private String birthday;

    private Integer classno;

    private Float point;

    private String phone;

    private String email;

    private Set<Course> courses=new HashSet<Course>();//利用集合表达一个学生有多个课程