如何解决线程中的异常＆＃34; main＆＃34; org.hibernate.MappingException：未知实体：

Question

我在线程＆＃34; main＆＃34;中得到一个例外。 org.hibernate.MappingException：未知实体：net.codejava.hibernate.Book。

代码

public class MainApp {
public static void main(String[] args) {

    SessionFactory sessionFactory = new Configuration().configure("hibernate.cfg.xml").buildSessionFactory();

    Session session = sessionFactory.openSession();
    session.beginTransaction();

    // Check database version
    String sql = "select version()";

    String result = (String) session.createNativeQuery(sql).getSingleResult();
    System.out.println(result);

    session.getTransaction().commit();
    session.close();

    Book book = new Book();
    book.setTitle("Effective Java");
    book.setAuthor("Joshua Bloch");
    book.setPrice(32.59f);

    Session session1 = sessionFactory.openSession();
    session1.beginTransaction();

    session1.save(book);

    session1.getTransaction().commit();
    session1.close();


   // HibernateUtil.shutdown();
  }
}

Answer 1

解决方案1：

this.cdr.detectchanges

解决方案2：

sessionFactory.setPackagesToScan(
  new String[] { "net.codejava.hibernate" });