我正在学习休眠，所以我做了一个小应用，用MySQL作为数据库进行CRUD操作。然而，我收到了一些错误，并且我在任何地方都找不到解决方案。SDK 17.0.2，我不是使用maven，而且所有Hibernate最终JAR文件都已添加

我的班级：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import com.luv2code.hibernate.demo.entity.Student;

public class CreateStudentDemo {

    public static void main(String[] args) {
        // Create session factory

        SessionFactory factory= new Configuration()
                               .configure("hibernate.cfg.xml")
                               .addAnnotatedClass(Student.class)
                               .buildSessionFactory();

        //Create session
        Session session = factory.getCurrentSession();

        try {
            //Create a Student object
            System.out.println("Creating new student");
            Student tempStudent = new Student("Pau;", "Wall", "paul@luv2code.com");

            //Start a transaction
            session.beginTransaction();

            //save the student object
            session.save(tempStudent);

            //commit transaction
            session.getTransaction().commit();
        }
        finally {
            factory.close();
        }

    }

}

运行时错误：

java.security.PrivilegedActionException: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain)
Caused by: java.lang.NoSuchMethodException: sun.misc.Unsafe.defineClass(java.lang.String,[B,int,int,java.lang.ClassLoader,java.security.ProtectionDomain) 
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.lang.reflect.Method.invoke(Object, Object[])" because "com.sun.xml.bind.v2.runtime.reflect.opt.Injector.defineClass" is null