struts2 + ajax 用户名登录验证（struts2+spring+ibatis）

 

js代码：

<!-- ajax 验证 -->

<script type="text/javascript">

var xmlHttp;

var result = false;

function checkuid(){

var uname = document.all.userName.value;

if(uname.length<3){

document.all.unameMsg.innerHTML="<font color='red'>用户名太短，请重新输入！</font>";

return false;

}else{

document.all.unameMsg.innerHTML="<font color='red'>用户名检测中...</font>";

if(window.ActiveXObject){

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

}else if(window.XMLHttpRequest){

xmlHttp = new XMLHttpRequest();

}

var uri = "NewHouseUserAction!execute.oj?user="+uname;

uri = encodeURI(uri);

uri = encodeURI(uri);

xmlHttp.open("post",uri,true);

xmlHttp.onreadystatechange = function(){

if(xmlHttp.readyState==4){

if(xmlHttp.status==200){

var flag = xmlHttp.responseText;

if(flag=="true"){

document.all.unameMsg.innerHTML="<font color='red'>该用户名已被使用，请您重新选择用户名！</font>";

result = false;

}else{

document.all.unameMsg.innerHTML="<font color='red'>恭喜您，该用户名可用!</font>";

result = true ;

}

}

}

}

xmlHttp.send(null);

}

}

</script>

<s:form action="NewHouseUserAction!developRegister.oj"

onsubmit="return validateForm(this);" method="post" enctype="multipart/form-data">

<ul>

<li>

<label class="span_item">

用户名:

</label>

<input type="text" name="userName" value="${developUser.username}"

class="input_text" id="userName" onblur="checkuid();" />

<div id="unameMsg"></div>

<img src="../images/check_right.gif" class="li_imgtip" />

<span class="li_tip">4-15个字符(包括英文字母、数字、下划线，区分大小写) </span>

<div class="clear"></div>

</li>

    其他注册代码省略。。。。。

</s:form>

action 代码：

public String   checkUser() {

    developService = (DevelopService) this.getBean("developService");

    String userName = this.request().getParameter("user");

    PrintWriter pw = null;

    try {

    pw = this.response().getWriter();

response().setContentType("html/text");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

    Map map = new HashMap();

map.put("username", userName.trim());

Object object = developService.getObject(

"develop.abatorgenerated_ByUser", map);

if (object!=null) {

pw.write("true");

}else {

pw.write("false");

}

    pw.flush();

    pw.close();

   

    return SUCCESS;

}

struts.xml 代码（spring bean注入这一块就不贴了，直接贴页面跳转代码）：

<!-- 开发商新房发布登录页面 -->

         <action name="NewHouseUserAction"

         class="com.onejia.www.web.action.DevelopAction">

                <result name="index">/index2.jsp</result>

                <result name="succeed">/jsp/registerSucceed.jsp</result>

                <result name="register">/jsp/developRegister.jsp</result>

                <result name="login">/jsp/login.jsp</result>

                <result name="success">/jsp/developRegister.jsp</result>

         </action>

已经测试成功！！