石头JAVA摆地摊儿

JAVA所有的讨论-要一点一点的进步
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JSON简用
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>

    <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="json2.js"></script>

        <script>
var ajaxObject;
var username;
var password;
function createAjax()
{
   if (window.ActiveXObject)
   {
      ajaxObject = new ActiveXObject("Microsoft.XMLHTTP");
   }
   else if(window.XMLHttpRequest)
   {
      ajaxObject = new XMLHttpRequest();
   }
}



function showText()
{
   var username = document.getElementById("username").value;
   var password = document.getElementById("password").value;
   var createUserInfoJSON = JSON.stringify(new createUserInfo(username, password));

   createAjax();
   ajaxObject.onreadystatechange = backCall;
   ajaxObject.open("GET", "write", true);
   ajaxObject.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
   ajaxObject.send(createUserInfoJSON);
}

function backCall()
{
   if (ajaxObject.readyState == 4)
   {
      if (ajaxObject.status == 200)
      {
         var xmlString = ajaxObject.responseText;
         alert("response Text is:\n" + xmlString)
      }
   }
}

function createUserInfo(username, password)
{
   this.username = username;
   this.password = password;

}


 </script>
    </head>

    <body>
username:<input id="username" type="text" name="username"/><br/>
password:<input id="password" type="text" name="password"/>
        <input type="button" onclick="showText()" value="click me!"
            name="button" />
    </body>

</html>

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

public class write extends HttpServlet {

    public write() {
        super();
    }

    public void destroy() {
        super.destroy();
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String line = "";
        StringBuffer buffer = new StringBuffer();
        BufferedReader reader = request.getReader();
        while ((line = reader.readLine()) != null) {
            buffer.append(line);
        }
        
        System.out.println(buffer.toString());
        JSONObject json = JSONObject.fromObject(buffer.toString());

        String responseText = "username=" + json.getString("username")
                + " password=" + json.getString("password");

        response.getWriter().print(responseText);

    }

    public void init() throws ServletException {

    }

}

别忘了下载一些JAR文件，www.json.org中有详细的资料。
posted on 2009-05-13 00:26 石头JAVA摆地摊儿 阅读(290) 评论(0)  编辑  收藏

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