Session session = sessionFactory.openSession();
        Transaction transaction = null;
        String res = "";
        boolean needclear = false;
        try {
            transaction = session.beginTransaction();
    .....

        for (en1 l1 :list){
           for(en2 l2:list){
              for(en3 l3:list){
                for (en4 l4:list){
                  for(RK_L5_CITS l5:list){

                     transactionalSession.delete(l5); 
                  }
                  transactionalSession.delete(l4); 
                }
                transactionalSession.delete(l3); 
              }
              transactionalSession.delete(l2); 
           }
           transactionalSession.delete(l1); 
        }