request.getParameter(“xxx”)的参数的取值

request.getParameter(“xxx”)的参数的取值的几种可能：

1. Html中form表单中标签的name属性：

 <form name="form" method="post" action="checkUser">  
 请输入用户姓名：<input type="text" name="username">  
 <input type="submit" name="Submit" value="提交">  
 </form>  
 request.getParameter(“username”);

2. Html中form表单提交时的action的参数

 <form name="form" method="post" action="checkUser？Flag=1&Id=2">  
 请输入用户姓名：<input type="text" name="username">  
 <input type="submit" name="Submit" value="提交">  
 </form>  
 request.getParameter(“username”);
 request.getParameter(“Flag”);
 request.getParameter(“Id”);

3. Html中url的内容

 <a href="SortServlet?flag=5&temp=2" οnclick="sort()"><img src="images/cbsj.jpg" /></a>
 request.getParameter(“flag”);
 request.getParameter(“temp”);

4. Ajax中的data

 <form name="form" action="" method="post">
 <div style="margin-bottom:10px;">
   <input class="TxtUserNameCssClass" type="text" id="UserCode" value="" />
 </div>
 <div style="margin-top:20px;">
   <input class="TxtPasswordCssClass" type="Password" id="UserPwd" value="" />
 </div>
 </form>
 <div class=IbtnEnterCssClass id="IbtnEnter" οnclick="submitForm()">登录</div>
  
 function submitForm(){
   var UserCode = $("#UserCode").val();
   var UserPwd = $("#UserPwd").val();
   var mypwd = $.base64.btoa($.md5(UserPwd).toUpperCase());
   var checkUserParams = {
   usercode:UserCode,
   userpwd:mypwd
 };
 $.ajax({
   url : 'checkUser.asp?mathid='+Math.random(),
   type : 'post',
   data : checkUserParams,
   dataType:'json',//接受数据格式
   success : function(data) {
   },
   failure : function(data) {
     }
   });
 }
  
 request.getParameter("usercode");
 request.getParameter("userpwd");