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");