java实现遍历树形菜单方法——OpenSessionView实现

 /**  
* @Title: OpenSessionView.java
* @Package org.util
* @Description: TODO该方法的主要作用：
* @author A18ccms A18ccms_gmail_com  
* @date 2017-5-6 下午1:48:25
* @version V1.0  
*/
package org.web;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.dao.BaseHibernateDao;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;

 /**   
 *    
 * 项目名称：votedemo   
 * 类名称：OpenSessionView   
 * 类描述：   让session 始终保持着一个打开的状态
 * 创建人：Mu Xiongxiong  
 * 创建时间：2017-5-6 下午1:48:25   
 * 修改人：Mu Xiongxiong   
 * 修改时间：2017-5-6 下午1:48:25   
 * 修改备注：   
 * @version    
 *    
 */
public class OpenSessionView extends BaseHibernateDao implements Filter {

	/**(非 Javadoc)
	 * <p>Title: destroy</p>
	 * <p>Description(描述): </p>
	 * @see javax.servlet.Filter#destroy()
	 */

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	/**(非 Javadoc)
	 * <p>Title: doFilter</p>
	 * <p>Description(描述): </p>
	 * @param arg0
	 * @param arg1
	 * @param arg2
	 * @throws IOException
	 * @throws ServletException
	 * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
	 */

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		Session session = null;
		Transaction tx  = null;
		
		try {
			session = getSession();
			tx = session.beginTransaction();
			arg2.doFilter(arg0, arg1);
			tx.commit();
		} catch (Exception e) {
			e.printStackTrace();
			tx.rollback();
		}finally{
			closeSession();
		}
		

	}

	/**(非 Javadoc)
	 * <p>Title: init</p>
	 * <p>Description(描述): </p>
	 * @param arg0
	 * @throws ServletException
	 * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
	 */

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}