[求助]注册验证的错误(页 1) - Ajax论坛

可可℃乐 发表于 2007-5-6 14:49

[求助]注册验证的错误

弄了个小小的注册验证不太明白，在网上找了些代码改了改。 一共三个文件ajax.js,checkuser.jsp,test.jsp 第一个是：ajax.js //定义XMLHttpRequest对象实例 var http_request = false; //定义可重复使用的HTTP请求函数 function send_request(method,url,content,responseType,callback){ ////初始化、指定处理函数、发送请求的函数 http_request = false; //初始化XMLHttpRequest对象 if(window.XMLHttpRequest){ http_request = new XMLHttpRequest(); if(http_request.overrideMimeType){ //设置MIME类型 http_request.overrideMimeType("text/xml"); } }else if(window.ActionXObject){ //IE浏览器 try{ http_request = new ActionXObject("Msxml2.XMLHTTP"); }catch(e){ try{ http_request = new ActionXObject("Microsoft.XMLHTTP"); }catch(e){} } } if(!http_request){ // 异常，创建对象实例失败 window.alert('对不起！不能创建XMLHttpRequest对象!'); return false; } if(responseType.toLowerCase()=="text"){ http_request.onreadystatechange=="callback"; }else(responseType.toLowerCase()=="xml"){ http_request.onreadystatechange=="callback"; }else{ window.alert("相应类型参数错误！"); return false; } // 确定发送请求的方式和URL以及是否异步执行下段代码 if(method.toLowerCase()=="get"){ http_request.open(method,url,true); }else if(method.toLowerCase()=="post"){ http_request.open(method, url, true); http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); }else { window.alert("http请求类别参数错误。"); return false; } http_request.send(content); }
 // 处理返回文本格式信息的函数 function processTextResponse(){ if(http_request.readyState==4){ if(http_request.status==200){ window.alert("Text文档响应。"); }else{ window.alert("您所请求的页面有异常。"); } } }
//处理返回的XML格式文档的函数 function processXMLResponse() { if (http_request.readyState == 4) { // 判断对象状态 if (http_request.status == 200) { // 信息已经成功返回，开始处理信息 //alert(http_request.responseXML); alert("XML文档响应。"); } else { //页面不正常 alert("您所请求的页面有异常。"); } } } 第二个文件：test.jsp <%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<a href="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" target="_blank" >http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd</A>"> <html xmlns="<a href="http://www.w3.org/1999/xhtml" target="_blank" >http://www.w3.org/1999/xhtml</A>"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> </head> <script language="text/javascript" src="ajax.js"></script> <script language="text/javascript">
 function myAlert(strTitle){ var message = document.getElement.getElementById("myDiv").innerHTML; var winl = new Zapatec.AlertWindow(message, {title:strTitle, modal:true, width : 580,height:330}); } function doCheck(){ //var f = document.forms[0]; if(document.form1.username.value!="") { document.getElementById("feedback_info").innerHTML = "系统正在处理您的请求，请稍后。"; send_request("GET","checkuser.jsp?username="+document.form1.username.value,null,"text",showFeedbackInfo); } else { document.getElementById("feedback_info").innerHTML = "请输入用户名称。"; }
 } function showFeedbackInfo() { if (http_request.readyState == 4) { // 判断对象状态 if (http_request.status == 200) { // 信息已经成功返回，开始处理信息 document.getElementById("feedback_info").innerHTML = http_request.responseText; } else { //页面不正常 alert("您所请求的页面有异常。"); } } }
</script> <body> <form id="form1" name="form1" method="get" action=""> <table align="center" width="248" border="1" cellpadding="0" cellspacing="0"> <tr> <td height="31" colspan="2"><div align="center">注册测试</div></td> </tr> <tr> <td width="86" height="19">用户名：</td> <td width="156"><div align="center"> <input name="username" type="text" size="10" onblur="doCheck()" /> </div></td> </tr> <tr><td colspan="2"></td> <tr>
 <tr> <td height="20">密码：</td> <td><div align="center"> <input name="password" type="text" id="password" size="10" /> </div></td> </tr> <tr> <td height="32">&nbsp;</td> <td><input type="submit" name="Submit" value="提交" /> <input type="reset" name="Submit2" value="重置" /></td> </tr> </table> </form>
</body> </html> 第三个是：checkuser.jsp <%@ page contentType="text/html; charset=GBK" language="java" import="java.sql.*" errorPage="" %> <%@ include file="/login_check.jsp" %> <%@ page import="com.zwh.tools.*" %> <%@ include file="/includes/base_new.jsp" %> <% String username = request.getParameter("username"); sql = "select * from yhgl where zh='"+username+"'"; System.out.println(sql+"OOOOOOOOOOOOOOO"); pstmt = conn.parepareStatement(sql); rs = pstmt.executeQuery(); if(rs.next()){ out.println("用户名称["+username+"]已经被注册，请更换其他用户名称再注册。"); }else{ out.println("恭喜您！用户名称["+username+"]尚未被注册，您可以继续。"); } DBUtils.closeConn(pstmt, rs); %> <%@ include file="/includes/end_new.jsp" %> 一直提示对象为空。 请教哪位帮我看看万分感谢。。。。[em01]

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