java实现遍历树形菜单两种实现代码分享

2021-01-30 12:11一步一步完善 JAVA教程

这篇文章主要介绍了java实现遍历树形菜单两种实现代码分享，两种实现：OpenSessionView实现、TreeAction实现。具有一定参考价值，需要的朋友可以了解下。

文本主要向大家分享了java实现遍历树形菜单的实例代码，具体如下。

OpenSessionView实现：

									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;

									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

									    }

									}

TreeAction实现

									package org.web;

									import net.sf.json.JSONArray;

									import net.sf.json.JSONObject;

									import org.Service.IVoteTreeService;

									import org.Service.impl.VoteTreeServiceImpl;

									import com.alibaba.fastjson.JSON;

									import com.opensymphony.xwork2.ActionSupport;

									public class TreeAction extends ActionSupport {

									    private JSONArray treejson;

									    private IVoteTreeService voteService = new VoteTreeServiceImpl();

									    public String getTree(){

									        treejson = voteService.getTreeJson();

									        return SUCCESS;

									    }

									    public JSONArray getTreejson() {

									        return treejson;

									    }

									    public void setTreejson(JSONArray treejson) {

									        this.treejson = treejson;

									    }

									}