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Java ORM Common DAO(Data Access Object), eliminate the interface and implements of DAO.
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package cn.easyproject.easycommons.commondao;


import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;


import org.hibernate.Hibernate;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.jdbc.Work;
import org.hibernate.transform.Transformers;

import cn.easyproject.easycommons.commondao.util.EasyCriteria;
import cn.easyproject.easycommons.commondao.util.PageBean;
import cn.easyproject.easycommons.commondao.factory.HibernateSessionFactory;

/**
 * Hibernat4 CommonDAO implement.
 * @author Ray
 * @author [email protected]
 * @author easyproject.cn
 * @since 1.0.0
 * 
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class CommonDAOImpl  implements CommonDAO {

	@Override
	public void batchUpdateSQL(final String sql, final Object[] values) {
		Session session=HibernateSessionFactory.getSession();
		session.doWork(new Work() {
			@Override
			public void execute(Connection connection) throws SQLException {
				PreparedStatement pstmt = null;
				try {
					connection.setAutoCommit(false);// 手动提交
					pstmt = connection.prepareStatement(sql);// 预编译
					for (int i = 0; i < values.length; i++) {
						pstmt.setObject(1, values[i]);
						pstmt.addBatch();
					}
					pstmt.executeBatch();// 将参数加入到批处理
					connection.commit();// 提交
				} catch (Exception e) {
					e.printStackTrace();
				} finally {
					if (pstmt != null) {
						try {
							pstmt.close();
						} catch (SQLException e) {
							e.printStackTrace();
						}
					}
				}
				try {
					if (connection != null && (!connection.isClosed())) {
						connection.close();
					}
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		});
		if (session.isOpen()) {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public void batchUpdateSQL(final String sql,final Object[][] values) {
		Session session=HibernateSessionFactory.getSession();
		session.doWork(new Work() {
			@Override
			public void execute(Connection connection) throws SQLException {
				PreparedStatement pstmt = null;
				try {

					connection.setAutoCommit(false);// 手动提交
					pstmt = connection.prepareStatement(sql);// 预编译

					for (Object[] row : values) {
						for (int i = 0; i < row.length; i++) {
							pstmt.setObject(i + 1, row[i]);
						}
						pstmt.addBatch();
					}
					pstmt.executeBatch();// 将参数加入到批处理
					connection.commit();// 提交
				} catch (Exception e) {
					e.printStackTrace();
				} finally {
					if (pstmt != null) {
						try {
							pstmt.close();
						} catch (SQLException e) {
							e.printStackTrace();
						}
					}
				}
				try {
					if (connection != null && (!connection.isClosed())) {
						connection.close();
					}
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		});
		if (session.isOpen()) {
			HibernateSessionFactory.closeSession();
		}
	}
	/**
	 * CommonDAO 内部方法，获得Session，并开始事务
	 * @return Session
	 */
	private Session beginTransaction(){
		Session session=HibernateSessionFactory.getSession();
		session.getTransaction().begin();
		return session;
	}
	/**
	 * CommonDAO 内部方法，关闭Session
	 */
	private void close(){
		 HibernateSessionFactory.closeSession();
	}
	/**
	 * CommonDAO 内部方法，提交事务
	 */
	private void commit(Session session){
		session.getTransaction().commit();
	}
	/**
	 * CommonDAO 内部方法，NamedQuery
	 * @param session session
	 * @param name name
	 * @param cacheable cacheable
	 * @param cacheRegion cacheRegion
	 * @param values values
	 * @return Query对象
	 */
	private Query createNamedQuery(Session session,String name, boolean cacheable,String cacheRegion, Object...values){
		Query query=session.getNamedQuery(name.trim());
		if(cacheable){
			query.setCacheable(true);
			if(cacheRegion!=null&&(!cacheRegion.equals(""))){
				query.setCacheRegion(cacheRegion);
			}
		}
		if(values!=null&&values.length>0){
			for (int i = 0; i < values.length; i++) {
				query.setParameter(i, values[i]);
			}
		}
		return query;
	}
	/**
	 * CommonDAO 内部方法, NativeQuery
	 * @param session session
	 * @param sql sql
	 * @param values values
	 * @return Query对象
	 */
	private Query createNativeQuery(Session session,String sql,Class resultClass, boolean mapResult, Object...values){
		Query query=null;
		if(resultClass!=null){
			 query=session.createSQLQuery(sql).addEntity(resultClass);
		}else{
			 query=session.createSQLQuery(sql);
		}
		
		// 封装为Map结果
		if(mapResult){
			query.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP);
		}
		
		if(values!=null&&values.length>0){
			for (int i = 0; i < values.length; i++) {
				query.setParameter(i, values[i]);
			}
		}
		return query;
	}
	
	/**
	 * CommonDAO 内部方法，Query
	 * @param session session
	 * @param hql jqpl
	 * @param cacheable cacheable
	 * @param cacheRegion cacheRegion
	 * @param values values
	 * @return Query对象
	 */
	private Query createQuery(Session session,String hql, boolean cacheable,String cacheRegion, Object...values){
		Query query=session.createQuery(hql);
		if(cacheable){
			query.setCacheable(true);
			if(cacheRegion!=null&&(!cacheRegion.equals(""))){
				query.setCacheRegion(cacheRegion);
			}
		}
		if(values!=null&&values.length>0){
			for (int i = 0; i < values.length; i++) {
				query.setParameter(i, values[i]);
			}
		}
		return query;
	}
	
	
	@Override
	public void delete(Class clazz, Serializable id) {
		Session session = null;
		try {
		    session = beginTransaction();
		    session.delete( session.get(clazz, id) );
		    
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	}

	@Override
	public void delete(Object o) {
		Session session = null;
		try {
		    session = beginTransaction();
		    session.delete( o );
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	}

	@Override
	public Integer deleteByValues(Class cls, String idFieldName,
			String[] values) {
		int res=0;
		Session session = null;
		try {
		    session = beginTransaction();
		    	
		    StringBuilder ins=new StringBuilder();
		    ins.append("'");
		    for (String v : values) {
		    	ins.append(v).append("','");
			}

			String hql = "delete from " + cls.getSimpleName() + " where "
					+ idFieldName + " in(" + ins.substring(0, ins.length()-2) + ")";
			res=session.createQuery(hql).executeUpdate();
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
		return res;
	}

	@Override
	public void deleteCascadeByValues(Class cls, String fieldName, String[] values) {
		Session session = null;
		try {
		    session = beginTransaction();
		    	
		    StringBuilder ins=new StringBuilder();
		    ins.append("'");
		    for (String v : values) {
		    	ins.append(v).append("','");
			}
			String hql = "from " + cls.getSimpleName() + " where "
					+ fieldName + " in(" + ins.substring(0, ins.length()-2) + ")";
			for (Object o : session.createQuery(hql).list()) {
				session.delete(o);
			}
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	
		
	}
	
	@Override
	public void evict(Class cls) {
		HibernateSessionFactory.getSessionFactory().getCache().evictEntityRegion(cls);
	}

	@Override
	public void evict(Class cls, Serializable id) {
		HibernateSessionFactory.getSessionFactory().getCache().evictEntity(cls, id);
	}

	@Override
	public void evictAll() {
		HibernateSessionFactory.getSessionFactory().getCache().evictEntityRegions();
	}
	
	@Override
	public void evictCollectionRegion(String collectionRegion) {
		HibernateSessionFactory.getSessionFactory().getCache()
				.evictCollectionRegion(collectionRegion);
	}

	@Override
	public void evictCollectionRegion(String collectionRegion, Serializable id) {
		HibernateSessionFactory.getSessionFactory().getCache()
				.evictCollection(collectionRegion, id);

	}

	@Override
	public void evictQueries() {
		if (null != DEFAULT_QUERY_CACHE_REGION
				|| (!"".equals(DEFAULT_QUERY_CACHE_REGION))) {
			HibernateSessionFactory.getSessionFactory().getCache()
			.evictQueryRegion(DEFAULT_QUERY_CACHE_REGION);
		} else {
			HibernateSessionFactory.getSessionFactory().getCache()
					.evictQueryRegions();
		}
	}



	@Override
	public void evictQueries(String queryCacheRegion) {
		HibernateSessionFactory.getSessionFactory().getCache().evictQueryRegion( queryCacheRegion );
	}
	@Override
	public  T find(Class clazz, Serializable id) {
		Session session = null;
		try {
			session=HibernateSessionFactory.getSession();
			return (T) session.get(clazz, id);
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}
	@Override
	public List find(String hql,EasyCriteria easyCriteria){
		if(easyCriteria!=null){
			return find(hql+" "+easyCriteria.getCondition(), easyCriteria.getValues().toArray());
		}else{
			return find(hql);
		}
		
	}

	@Override
	public List find(String hql, Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query q=createQuery(session, hql, false, null, values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
		
	}
	@Override
	public List findAll(Class cls) {
		Session session = null;
		try {
		    session = HibernateSessionFactory.getSession();
		    String queryString = "from " + cls.getName();
			List list = session.createQuery(queryString).list();
			initialize(list);
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public List findByCache(String hql, EasyCriteria easyCriteria){
		
		if(easyCriteria!=null){
			return findByCache(hql+" "+easyCriteria.getCondition(), easyCriteria.getValues().toArray());
		}else{
			return findByCache(hql);
		}
		
	
	
	}
	@Override
	public List findByCache(String hql, Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
			
			String cacheRegion=null;
			if (null != DEFAULT_QUERY_CACHE_REGION
					|| (!"".equals(DEFAULT_QUERY_CACHE_REGION))) {
				cacheRegion=DEFAULT_QUERY_CACHE_REGION;
			}
		    Query q=createQuery(session, hql, true, cacheRegion, values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public List findByCache(String hql, String queryCacheRegion, EasyCriteria easyCriteria){
		
		if(easyCriteria!=null){
			return findByCache(hql+" "+easyCriteria.getCondition(), queryCacheRegion, easyCriteria.getValues().toArray());
		}else{
			return findByCache(hql, queryCacheRegion);
		}
	}
	@Override
	public List findByCache(String hql, String queryCacheRegion,
			Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
			
		    Query q=createQuery(session, hql, true, queryCacheRegion, values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public void findByPage(PageBean pageBean) {
		this.findByPage(pageBean,new ArrayList());
	}
	
	@Override
	public void findByPage(PageBean pageBean, EasyCriteria easyCriteria) {
		if(easyCriteria!=null){
			pageBean.setCondition(easyCriteria.getCondition());
			this.findByPage(pageBean,easyCriteria.getValues());
		}else{
			this.findByPage(pageBean);
		}
	}

	@Override
	public void findByPage(PageBean pageBean, List values) {
		String hql = pageBean.getQuery() != null ? pageBean.getQuery()
				: pageBean.getAutoQuery();
		
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query query=createQuery(session, hql, false, null, values.toArray());
		    query.setFirstResult(pageBean.getRowStart());
			query.setMaxResults(pageBean.getRowsPerPage());
			
			pageBean.setData(query.list());
			
			String queryString = "";
			int end = hql.length();
			if (hql.indexOf("order by") != -1) {
				end = hql.indexOf("order by");
			}
			if (hql.toUpperCase().indexOf("SELECT") != -1) {
				int i = hql.toUpperCase()
						.indexOf("FROM");
				queryString = "select count(1) " + hql.substring(i, end);
			} else {
				queryString = "select count(1) " + hql.substring(0, end);
			}
			
			// 去掉ORDER BY 的部分
			int j = queryString.toUpperCase().lastIndexOf("ORDER");
			if (j != -1) {
				queryString = queryString.substring(0, j);
			}
			Query cquery = createQuery(session, queryString, false, null, values.toArray());
			
			int maxRow = (Integer.valueOf(cquery.uniqueResult().toString())).intValue();
			pageBean.setRowsCount(maxRow);
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
		
		
		
	}

	@Override
	public List findByProperty(Class cls, String propertyName, Object value) {
			String queryString = "from " + cls.getName()
					+ " model where model." + propertyName + "= ?";
			return find(queryString, value);
	}
	
	
	@Override
	public List findByPropertyIgnoreCase(Class cls, String propertyName,
			String value) {
			String queryString = "from " + cls.getName()
					+ " model where lower(model." + propertyName + ")= ?";
			return find(queryString, value.toLowerCase());
	}
	
	@Override
	public List findBySQL(String sql, Class resultClass, EasyCriteria easyCriteria) {
		if(easyCriteria!=null){
			return findBySQL(sql+" "+easyCriteria.getCondition(), resultClass, easyCriteria.getValues().toArray());
		}else{
			return findBySQL(sql, resultClass);
		}
	}
	@Override
	public List findBySQL(String sql, Class resultClass, Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
			
		    Query q=createNativeQuery(session, sql, resultClass, false, values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	
	}
	
	@Override
	public List findBySQL(String sql, EasyCriteria easyCriteria) {
		if(easyCriteria!=null){
			return findBySQL(sql+" "+easyCriteria.getCondition(), easyCriteria.getValues().toArray());
		}else{
			return findBySQL(sql);
		}
	}

	@Override
	public List findBySQL(String sql, Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
			
		    Query q=createNativeQuery(session, sql,null,false,values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}
	@Override
	public int findCount(String hql,EasyCriteria easyCriteria) {
		if(easyCriteria!=null){
			return findCount(hql+" "+easyCriteria.getCondition(), easyCriteria.getValues().toArray());
		}else{
			return findCount(hql);
		}
	}
	

	@Override
	public int findCount(String hql, Object... values) {

		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query q=createQuery(session, hql, false, null, values);
		    return Integer.valueOf(q.uniqueResult().toString());
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
		
	}

	@Override
	public List findMapResultBySQL(String sql,EasyCriteria easyCriteria){
		if(easyCriteria!=null){
			return findMapResultBySQL(sql+" "+easyCriteria.getCondition(), easyCriteria.getValues().toArray());
		}else{
			return findMapResultBySQL(sql);
		}
	}

	@Override
	public List findMapResultBySQL(String sql, Object... values){
		
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
			
		    Query q=createNativeQuery(session, sql,null,true,values);
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public int findMaxPage(String hql, int rowsPerPage, EasyCriteria easyCriteria) {
		return (this.findCount(hql, easyCriteria) - 1) / rowsPerPage + 1;
	}

	
	@Override
	public int findMaxPage(String hql, int rowsPerPage, Object... values) {
		return (this.findCount(hql, values) - 1) / rowsPerPage + 1;
	}


	@Override
	public List findNamedQuery(String name, Object... values) {

		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query q=createNamedQuery(session, name, false, null, values);
		    return q.list();
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public List findNamedQueryByCache(String name, String queryCacheRegion, Object... values) {
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query q=createNamedQuery(session, name, true, queryCacheRegion, values);
		    return q.list();
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}

	@Override
	public List findTop( String hql, int topCount,  EasyCriteria easyCriteria){
		
		if(easyCriteria!=null){
			return findTop(hql+" "+easyCriteria.getCondition(), topCount, easyCriteria.getValues().toArray());
		}else{
			return findTop(hql, topCount);
			
		}
	}

	@Override
	public List findTop(String hql,  int topCount,
			 Object... values) {
		
		Session session = null;
		try {
			session = HibernateSessionFactory.getSession();
		    Query q=session.createQuery(hql);
		    q.setFirstResult(0);
			q.setMaxResults(topCount);
			if (values != null && values.length > 0) {
				for (int i = 0; i < values.length; i++) {
					q.setParameter(i, values[i]);
				}
			}
			
			List list = q.list();
		    return list;
		} catch (RuntimeException e) {
		    throw e;
		} finally {
			HibernateSessionFactory.closeSession();
		}
	}
	@Override
	public  T findVal(String hql,  EasyCriteria easyCriteria) {
		List list = this.find(hql, easyCriteria);
		return (T) (list.size() > 0 ? list.get(0) : null);
	}

	@Override
	public  T findVal(String hql, Object... values) {
		List list = this.find(hql, values);
		return (T) (list.size() > 0 ? list.get(0) : null);
	}

	@Override
	public Session getCurrentSession() {
		return HibernateSessionFactory.getSession();
	}

	@Override
	public void initialize(Object proxy) {
		if (!Hibernate.isInitialized(proxy)) {
			Hibernate.initialize(proxy);
		}
	}

	@Override
	public void initializeDeep(Collection collection) {

		if (collection == null) {
			return;
		}

		for (Object obj : collection) {
			Method[] methods = obj.getClass().getMethods();
			if (methods != null) {
				for (int j = 0; j < methods.length; j++) {
					String getName = methods[j].getName();
					if (getName.length() > 3 && getName.startsWith("get")) {
						String getFix = getName.substring(3, getName.length());
						for (int k = 0; k < methods.length; k++) {
							String setName = methods[k].getName();
							if (setName.length() > 3
									&& setName.startsWith("set")) {
								String setFix = setName.substring(3,
										setName.length());
								if (getFix.equals(setFix)) {
									try {
										Object o = methods[j].invoke(obj,
												new Object[0]);
										if (o != null) {
											Hibernate.initialize(o);
											methods[k].invoke(obj, o);
										}

									} catch (IllegalArgumentException e) {
										e.printStackTrace();
									} catch (IllegalAccessException e) {
										e.printStackTrace();
									} catch (InvocationTargetException e) {
										e.printStackTrace();
									}
								}
							}
						}
					}

				}
			}

		}
	}
	@Override
	public void merge(Object o) {
		Session session = null;
		try {
		    session = beginTransaction();
		    session.merge(o);
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	}

	@Override
	public void persist(Object o) {
		Session session = null;
		try {
		    session = beginTransaction();
		    session.persist(o);
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	}

	/**
	 * CommonDAO 内部方法，回滚事务
	 */
	private void rollback(Session session){
		Transaction txn=session.getTransaction();
		if ( txn != null && txn.isActive()) txn.rollback();
	}

	@Override
	public void updateByHql(String hql, Object... values) {
		Session session = null;
		try {
		   session = beginTransaction();
		   Query query=session.createQuery(hql);
		   if (values != null && values.length > 0) {
				for (int i = 0; i < values.length; i++) {
					query.setParameter(i, values[i]);
				}
			}
		    query.executeUpdate();
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}
	}

	@Override
	public void updateBySQL(String sql, Object... values) {
		Session session = null;
		try {
		   session = beginTransaction();
		   Query query=session.createSQLQuery(sql);
		   if (values != null && values.length > 0) {
				for (int i = 0; i < values.length; i++) {
					query.setParameter(i, values[i]);
				}
			}
		   query.executeUpdate();
		    commit(session);
		} catch (RuntimeException e) {
		    rollback(session);
		    throw e;
		} finally {
			close();
		}

	}

	

	

}