java实现遍历树形菜单两种实现代码分享
作者：一步一步完善
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;
}
}
总结
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