BlogJava-feifeirao-文章分类-AJAXhttp://www.blogjava.net/feifeirao/category/22883.htmlzh-cnTue, 05 Jun 2007 11:38:44 GMTTue, 05 Jun 2007 11:38:44 GMT60ajax电子邮件校验例子http://www.blogjava.net/feifeirao/articles/120706.html五味子五味子Tue, 29 May 2007 08:12:00 GMThttp://www.blogjava.net/feifeirao/articles/120706.htmlhttp://www.blogjava.net/feifeirao/comments/120706.htmlhttp://www.blogjava.net/feifeirao/articles/120706.html#Feedback0http://www.blogjava.net/feifeirao/comments/commentRss/120706.htmlhttp://www.blogjava.net/feifeirao/services/trackbacks/120706.html<%@ page language="java" contentType="text/html; charset=GB2312"%>

<html>
<head>
<title>注册用户</title>
 <script type="text/javascript">        
     var http_request = false;
   
     function createXMLHttpRequest() {
           http_request = false;         
           if(window.XMLHttpRequest) {
                 http_request = new XMLHttpRequest();
                 if (http_request.overrideMimeType)  {
                      http_request.overrideMimeType("text/xml");
                 }
           }
           else if (window.ActiveXObject) {
                 try  {
                      http_request = new ActiveXObject("Msxml2.XMLHTTP");
                 } catch (e) {
                      try  {
                           http_request = new ActiveXObject("Microsoft.XMLHTTP");
                      } catch (e) {}
                 }
           }
           if (!http_request) {
                 window.alert("不能创建XMLHttpRequest 对象实例.");
                 return false;
           }           
      }
     
      function xmlhttpRequestEmail(infobox){
       if(checkEmail(infobox)){
        createXMLHttpRequest();
        var url = "http://localhost:8081/portal/showUser.do?email=" + document.reguser.email.value;
    http_request.open("POST", url, true);
    http_request.onreadystatechange = callbackEmail;
    http_request.send(null);
    return true;
   }
   return false;
      }
     
      function checkEmail(infobox){
       var email = document.reguser.email.value;     
       if(email == ""){
        formMsg(infobox,"请输入email地址");        
        return false;
       }
       var emailtest =/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;       
       if(!emailtest.test(email)){
        formMsg(infobox,"输入的email地址不正确");
        return false;
       }
       return true;
      }
     
      function formMsg(infobox,errormsg){    
   document.getElementById(infobox).innerHTML = errormsg;
   document.getElementById(infobox).className = "style3";
   }
  
   function hideMsg(strtype){
    document.getElementById(strtype).style.display="none";
   }
  
   function callbackEmail() {
   if (http_request.readyState == 4) {
    if (http_request.status == 200) {
     var res = http_request.responseText;     
     if(res=="0"){        
      document.getElementById("emaildiv").innerHTML= "恭喜您，电子邮件可以注册";
      document.getElementById("emaildiv").className = "style3"  
     }else if(res=="1"){      
      document.getElementById("emaildiv").innerHTML= "电子邮件已经注册过，请使用另一个邮箱";
      document.getElementById("emaildiv").className = "style3"      
     }    
    }
   }
  }

  
 </script>
</head>
<body>
<center>
 <form action="registerUser.do" name="reguser" method="post" onsubmit="return validate()"> 

 <table width="90%" border="0" cellspacing="1" cellpadding="3" align="center" class="FORM">
  <thead>
   <tr>
    <td class="dgrtitle" colspan="2">注册用户</td>
   </tr>
  </thead>
  <tbody>
   <tr>
    <td width="20%"><span class="required">*</span> 电子邮件:</td>
    <td width="20%"><input type="text" name="email" size="30" maxlength="30" onblur="xmlhttpRequestEmail('emaildiv');" Class="inputnotnull" />
    </td><td width="20%"><div id="emaildiv"></div></td>
   </tr>

  </tbody>
 </table>
 </form>
</center>
<br>

</body>
</html>

action类方法:
 private ActionForward doShowuser(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception{
  String email = form.getString("email");   
  if(StringUtils.isNotBlank(email)){
   String query = "from " + PortalUser.class.getSimpleName() +" t where t.email = '" + email +"'";
   PrintWriter out = null;
   try {
    if(getTManager().getListBy(query).isEmpty()){
     out = response.getWriter();
     out.write("0");
    }else{
     out = response.getWriter();    
     out.write("1");
    }
   }catch (IOException e) {       
    out = response.getWriter();    
    out.write("1");
    e.printStackTrace();
   }
  }  
  return null;
 }



五味子 2007-05-29 16:12 发表评论
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