searchaction.java~38~

全文搜索源码,基于开源项目Lucene编写,开发语言为JAVA,本程序做为LUCENE的示例DEMO

package com.ht.gis.action;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import javax.servlet.ServletContext;
import com.ht.gis.form.SearchForm;
import com.ht.gis.service.*;
import com.ht.gis.search.*;

public class SearchAction extends Action {
  private static Log log = LogFactory.getLog("WebGIS");

  public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) {
    try{
      String encodeing = httpServletRequest.getCharacterEncoding();
      /*java.io.BufferedReader bf = httpServletRequest.getReader();
      String srt=bf.readLine();
      while(srt!=null)
      {
       srt += srt+"\n";
       srt=bf.readLine();
      }*/
      //=============== 取表单数据 =======================
      SearchForm searchForm = (SearchForm)actionForm;
      String queryStr = searchForm.getQueryStr();
      String levelName = searchForm.getLevelname();
      String levelCode = searchForm.getLevelcode();

      //=============== 调用组件求查询结果(以后要通过调度类Dispatch进行任务调度) ================
      HttpSession httpSession = httpServletRequest.getSession(false);
      ServletContext servContext = httpSession.getServletContext();
      Searcher searcher = (Searcher)servContext.getAttribute("Searcher");
      String responseXML = searcher.search(queryStr,levelName,levelCode);

      //=============== 返回结果数据表单 ==================
      httpServletResponse.getWriter().println(responseXML);
      return null;
    }catch(Exception e){
      log.error(e);
      ActionErrors errors = new ActionErrors();
      errors.add("username", new ActionError("login.defeat"));
      this.saveErrors(httpServletRequest, errors);
      return actionMapping.findForward("fault");
    }  }
}