ajax 的一个问题

zcqzcq 2008-05-30 11:31:49

tr.aapendChild(td); 老是说这句话报错. 还有从数据库取出的中文显示是???
大家试下代码就知道问题出在哪里了

index.jsp



<%@ page  contentType="text/html; charset=gbk" language="java" import="java.util.*"  %>

 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

   

    

    <title>My JSP 'index.jsp' starting page</title>

 <script type="text/javascript">

  var xmlhttp;

 

 

 function createHttpRequest()

 {

  

   if(window.ActiveXObject)

   {

    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");

   }

   else if(window.XMLHttpRequest)

   {

     xmlhttp=new XMLHttpRequest();

   }

 }

function asd()

{

    

 createHttpRequest();

 xmlhttp.onreadystatechange=handechange;

 

 xmlhttp.open("post","Test");

 xmlhttp.send("action=a");

}

function handechange()

{

    if(xmlhttp.readyState==4)

    {

       if(xmlhttp.status==200)

       {

           

          var property=null;

          var result=xmlhttp.responseXML;

       var zcqs= result.getElementsByTagName("zcqzcq");

 

           

             

          for(var i=0;i<zcqs.length;i++)

          {

           property=zcqs[i];

           var zcq1=property.getElementsByTagName('zcq')[0].firstChild.nodeValue;

             

            table(zcq1); 

        

           document.getElementById('sp').innerHTML=" <font color='#00FF66'>加载成功</font> "

          }

        

       }

    }

    else

    {

      document.getElementById('sp').innerHTML="<font color='red'>加载中</font>"

    }

    

}

function table(txt)

{

  

  var tb=document.getElementById('tb');

  tb.setAttribute('border','1');

  

  var tr=document.createElement('tr');

 

  

  var td=document.createElement('td');

  var tn=document.createTextNode(txt);

  

  

  td.appendChild(tn);

  tr.aapendChild(td);

 

  tb.appendChild(tr);

}

 

 </script>

  </head>

  

  <body>

   <input type="text"  id="zcq" name="name" />

   <input type="text"  id="un" name="name" />

   <input type="button" value="dianji" onclick="asd()"  />

   <span id="sp"></span>

   

   

     <span id="aaa"></span>

   <table   id="tb" >

    

   

   </table>

  </body>

</html>

Test.java



package com.zcq.Servlet;



import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;



import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;



import org.hibernate.Query;

import org.hibernate.Session;



import com.zcq.dao.Asdas;

import com.zcq.dao.Dao;



public class Test extends HttpServlet {



	/**

	 * Constructor of the object.

	 */

	public Test() {

		super();

	}



	/**

	 * Destruction of the servlet. <br>

	 */

	public void destroy() {

		super.destroy(); // Just puts "destroy" string in log

		// Put your code here

	}



	/**

	 * The doGet method of the servlet. <br>

	 *

	 * This method is called when a form has its tag value method equals to get.

	 * 

	 * @param request the request send by the client to the server

	 * @param response the response send by the server to the client

	 * @throws ServletException if an error occurred

	 * @throws IOException if an error occurred

	 */

	public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		 

		PrintWriter out = response.getWriter();

		response.setContentType("text/xml;charset=gbk");   

		 

		Dao dao=new Dao();

		Session session=dao.session;

		Query q=session.createQuery("from Asdas ");

		List list=q.list();

 

		StringBuffer buff=new StringBuffer("<b>");

	

		 for (Iterator iterator = list.iterator(); iterator.hasNext();) {

			Asdas a= (Asdas) iterator.next();

			buff.append("<zcqzcq>");

			buff.append("<zcq>");

			buff.append(a.getZcq());

			buff.append("</zcq>"); 

			buff.append("</zcqzcq>");

	  

		}

		 

		 buff.append("</b>");

		dao.closeSession();

 

        out.println(buff.toString());

        

		out.flush();

		out.close();

	}



	/**

	 * The doPost method of the servlet. <br>

	 *

	 * This method is called when a form has its tag value method equals to post.

	 * 

	 * @param request the request send by the client to the server

	 * @param response the response send by the server to the client

	 * @throws ServletException if an error occurred

	 * @throws IOException if an error occurred

	 */

	public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {



		doGet(request, response);

	}



	/**

	 * Initialization of the servlet. <br>

	 *

	 * @throws ServletException if an error occurs

	 */

	public void init() throws ServletException {

		// Put your code here

	}



}