用户找回密码功能JS验证邮箱通过点击下一步隐藏邮箱输入框并修改下一步按钮的ID

//这里是BaseDao

     /**
      * 获得一个对象
      * @param hql
      * @param param
      * @return
      */
     public Object get(String hql, Object[] param){
         List<Object> objects = this.getHibernateTemplate().find(hql, param);
         if (objects != null && objects.size() > 0) {
             return objects.get(0);
         } else {
             return null;
         }
     }

//这里是UsersDaoImpl

     /**
      * 查找邮箱返回数量
      */
     public Integer CheckEmail(String email) {
         StringBuilder sb=new StringBuilder();
         sb.append("Select count(*) From Users where email='");
         if(StringUtils.isNotBlank(email)){
             sb.append(email);
         }
         sb.append("'");
         Long s=(Long) super.getCount(sb.toString());
         return s.intValue();
     }

     /**
      * 根据邮箱查看返回一个对象
      */
     public Users FindByEmail(String email) {
         String hql = "From Users where email =?";
         return (Users) super.get(hql, new Object[]{email});
     }

     /**
      * 修改密码
      */
     public void UpdatePassByEmail(Users user) {
         super.Update(user);

     }

//这里是UserAction

     public String checkEmail() throws IOException{
         HttpServletResponse response = ServletActionContext.getResponse();
         response.setContentType("text/html;charset=UTF-8");
         PrintWriter out = response.getWriter();
         message = "邮箱不存在";
         if(StringUtils.isNotBlank(email)){
             Integer count=userBiz.CheckEmail(email);
             if(count<=0){
                 message="邮箱不存在";
             }else{
                 message="";
             }
         }

         out.print(message);
         out.flush();
         out.close();

         return SUCCESS;

     }

     public String UpdatePassByEmail() throws IOException{
         HttpServletResponse response = ServletActionContext.getResponse();
         response.setContentType("text/html;charset=UTF-8");
         PrintWriter out = response.getWriter();
         message = "修改失败";
         boolean falg=false;

         if(StringUtils.isNotBlank(email)){
             if(StringUtils.isNotBlank(Password)){
                 if(StringUtils.isNotBlank(sure_password)){
                     if(!sure_password.equals(Password)){
                         falg=false;
                         message="密码不一致";
                     }else{

                         Users u=userBiz.FindByEmail(email);
                         u.setPassword(MD5Util.EncryptionMD5(sure_password));
                         userBiz.UpdatePassByEmail(u);
                         falg=true;
                         if(falg==true){
                             message="修改成功";
                         }else{
                             message="修改失败";
                         }
                     }
                 }
             }
         }
         out.print(message);
         out.flush();
         out.close();
         return SUCCESS;

     }

//这里是HTML页面

         <div id="login-content" class="clearfix">

             <form  method="post">
                 <fieldset id="filedset1">
                     <div class="control-group">
                         <label class="control-label" for="email">请输入注册时的邮箱</label>
                         <div class="controls">
                             <input type="text" name="email" id="email"
                                 onblur="Onblur()" />
                         </div>
                         <span style="color: red" id="message"></span>
                     </div>
                 </fieldset>

                 <fieldset id="filedset2" hidden="hidden">
                     <div class="control-group">
                         <label class="control-label" for="password">Password</label>
                         <div class="controls">
                             <input type="password" name="Password" id="password" onblur="RepassOnblur()"/>
                         </div>
                     </div>

                     <div class="control-group">
                         <label class="control-label" for="sure_password">Sure_Password</label>
                         <div class="controls">
                             <input type="password" name="sure_password" id="sure_password" onblur="RepassOnblur()"/>
                         </div>
                         <span style="color: red" id="messages"></span>
                     </div>
                 </fieldset>

                 <div class="pull-right">
                     <button type="button" id="Next" class="btn btn-warning btn-large">
                         下一步
                     </button>
                 </div>
             </form>

         </div>

//这里是JS代码

 /**
  * 这里是验证邮箱输入框事件
  */
 function Onblur(){
     var Email = $("#email").val();
     var EmailReg = /^([a-zA-Z0-9_-]{1,11})@([a-zA-Z0-9]{2,4}|126|163|189)\.([a-zA-Z0-9]{2,3})$/;

     if (Email.length == 0) {
         $("#message").html("邮箱不能为空");
         $("#Next").attr("disabled",true);
         return;
     } else if (!EmailReg.test(Email)) {
         $("#message").html("邮箱格式不正确      例:123456@126.com");
         $("#Next").attr("disabled",true);
         return;
     } else {
         $.ajax({
             type:"POST",
             dataType:"text",
             url:"checkEmail",
             data:{
                 "email":Email
             },
             success:function(data){

                 if(data==""){
                     $("#message").html("");
                     $("#Next").attr("disabled",false);

                 }else{
                     $("#message").html(data);
                     $("#Next").attr("disabled",true);
                 }
             },
             error:function(){
                 alert("通讯有问题,请稍候尝试...");
             }
         });

     }
 }

 /**
  * 点击下一步按钮事件
  * 隐藏邮箱输入框,显示密码输入框
  * 修改下一步按钮ID
  */
 $(function(){
     $("body").on("click","#Next",function(){
         $("#filedset1").hide();
         $("#filedset2").removeAttr("hidden");
         $("#Next").attr("id","Fix");
     });

     $("body").on("click","#Fix",function(){
         var Password = $("#password").val();
         var SurePassword = $("#sure_password").val();

         $.ajax({
             type:"POST",
             dataType:"text",
             url:"UpdatePassByEmail",
             data:{
                 "Password":Password,
                 "sure_password":SurePassword
             },
             success:function(data){
                 alert(data);
             },
             error:function(){
                 alert("通讯有问题,请稍候尝试...");
             }
         });
     });
 });

 /**
  * 验证密码输入框事件
  */
 function RepassOnblur(){
     var Password = $("#password").val();
     var SurePassword = $("#sure_password").val();

     if (Password.length == 0) {
         $("#messages").html("密码不能为空");
         $("#Fix").attr("disabled",true);
         return false;
     } else if (Password.length < 6 || Password.length > 16) {
         $("#messages").html("密码长度小于6位或大于16位");
         $("#Fix").attr("disabled",true);
         return false;
     } else {
         $("#messages").html("");
         $("#Fix").attr("disabled",true);
     }

     if (SurePassword.length == 0) {
         $("#messages").html("确认密码不能为空");
         $("#Fix").attr("disabled",true);
         return false;
     } else if (SurePassword.length < 6 || SurePassword.length > 16) {
         $("#messages").html("密码长度小于6位或大于16位");
         $("#Fix").attr("disabled",true);
         return false;
     } else if (SurePassword != Password) {
         $("#messages").html("密码不一致");
         $("#Fix").attr("disabled",true);
         return false;
     } else {
         $("#messages").html("");
         $("#Fix").attr("disabled",false);
     }
 }