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
 }
}

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;
 }
}