Java tutorial
/* ********************************************************************************************* * - - - - - - - - S T R U T S 2 B U I L D E R - - - - - - - - * This file was automatically generated on Tue Sep 10 00:39:54 CST 2013 * Struts2Builder 0.5.0 was released on August 28, 2012 * Internal Subversion Info: * $Revision: 34 $ * $Date: 2012-08-27 11:17:52 -0400 (Mon, 27 Aug 2012) $ * $Author: tom $ * Struts2Builder is copyright(c) 2009-2012 by * Balata Object Technology * Farmingdale, New York, USA 11735 * For more information, please visit http://struts2builder.sourceforge.net * Struts2Builder has been released under the MIT license * You are free to use this software in any project, commercial or non-commercial * ********************************************************************************************/ package com.nandhootoo.services; import java.sql.Timestamp; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.math.BigDecimal; import java.math.BigInteger; import java.util.Date; import com.nandhootoo.domain.User; import javax.persistence.EntityManager; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import javax.persistence.PersistenceContext; import javax.persistence.Query; import org.springframework.transaction.annotation.Transactional; @Transactional public class UserServiceImpl extends AbstractServiceImpl implements UserService { private EntityManager entityManager; @PersistenceContext public void setEntityManager(EntityManager passedEntityManager) { entityManager = passedEntityManager; } public List getUsersWithCriteria(String criteria) { try { Query aQuery = entityManager.createQuery("select user from User as user " + criteria); return aQuery.getResultList(); } catch (Exception sqlex) { System.out.println("SQL Exception: " + sqlex.getMessage()); return null; } } public User findByKey(Integer user) { return entityManager.find(User.class, user); } public void persist(User user) { EntityTransaction tx = null; try { entityManager.persist(user); } catch (Exception ex) { if (tx != null && tx.isActive()) tx.rollback(); throw (RuntimeException) ex.getCause(); } } public void merge(User user) { EntityTransaction tx = null; try { entityManager.merge(user); } catch (Exception ex) { if (tx != null && tx.isActive()) tx.rollback(); throw (RuntimeException) ex.getCause(); } } public void delete(User user) { EntityTransaction tx = null; this.deleteKey(user.getId()); } public void deleteItems(List<Integer> numbers, List<User> users) { EntityTransaction tx = null; int cntr = 0; for (Integer anInt : numbers) { User anUser = users.get(anInt); this.deleteKey(anUser.getId()); cntr++; } System.out.println("" + cntr + " users deleted"); } public void deleteKey(Integer id) { try { String hqlDelete = "delete User where id = :idString "; int deletedEntries = entityManager.createQuery(hqlDelete).setParameter("idString", id).executeUpdate(); } catch (Exception ex) { throw (RuntimeException) ex.getCause(); } } }