Java. lang. ExceptionInInitializerError (HIBERNATE problem)

This error occurs during the first running!

Exception

Javax. servlet. ServletException: Servlet execution threw an exception

Root cause

Java. lang. ExceptionInInitializerError
Classmate. HibernateUtil. <clinit> (HibernateUtil. java: 35)
Classmate. DbOperate. getUser (DbOperate. java: 25)
Classmate.LoginAction.exe cute (LoginAction. java: 27)
Org. apache. struts. action. RequestProcessor. processActionPerform (RequestProcessor. java: 419)
Org. apache. struts. action. RequestProcessor. process (RequestProcessor. java: 224)
Org. apache. struts. action. ActionServlet. process (ActionServlet. java: 1194)
Org. apache. struts. action. ActionServlet. doPost (ActionServlet. java: 432)
Javax. servlet. http. HttpServlet. service (HttpServlet. java: 709)
Javax. servlet. http. HttpServlet. service (HttpServlet. java: 802

The corresponding statement in the program is the THROW statement throw new ExceptionInInitializerError (ex );

The details are as follows:

Try {



SessionFactory = new Configuration (). configure (). buildSessionFactory ();

} Catch (Throwable ex ){
Ex. printStackTrace (); // TODO: handle exception
Throw new ExceptionInInitializerError (ex );
}

This error occurs during the second operation!

The above error only appears once!
Then this error always occurs!

Error message: Root cause

Java. lang. NoClassDefFoundError

The corresponding sentence in the program:

Session session = HibernateUtil. currentSession ();

Solution:

Put the JAR10 required packages of HIBERNATE

COPY to the LIB directory of the project
(If you build a path in JAVA, add the external JAR package, add the required packages, and COPY them to the LIB directory of the job !)