package com.edu;

import java.io.File;
import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class SelectServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request,HttpServletResponse response){	
		doPost(request,response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response){		
		String key = request.getParameter("key");
			try{
				 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				 DocumentBuilder builder = factory.newDocumentBuilder(); 
				 File[] files=GetFile.getALlFile();
				 String fileName = "";
				 String error="文件未找到！";
				 for(int i=0;i<files.length;i++){
					File f = files[i];	
					Document doc = builder.parse(f);
					Element root = doc.getDocumentElement();					
					NodeList list = root.getChildNodes();
					Node head = list.item(1);
					NodeList nl = head.getChildNodes();
					Element n = (Element) nl.item(3);
					String keywords = n.getAttribute("CONTENT");
					if(keywords.equals(key)){
						fileName += "<a href="+f.getAbsolutePath()+">"+f.getName()+"</a>"+"<br>";
						}
				 }
				 PrintWriter out = response.getWriter();
				 if(fileName!=null){
					 out.write(fileName);
				 }else if(fileName==null){
					 out.write(error);
				 }
				
			}
			catch(Exception e){
				e.printStackTrace();
			}			
	}
}