java实现遍历树形菜单方法——OpenSessionView实现

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 /**  * @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() */@Overridepublic 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) */@Overridepublic 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) */@Overridepublic void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub}}
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