Question

JavaScript传递参数给Servlet怎么操作的?

<script type="text/javascript">
function doit(flag,id)
{
if(flag=="modify"){
window.location.href="UserServlet?action=UserInfo&userId=id";
alert(id);
}

}
</script>
================
<a href="javascript:void(0)" onclick="doit('modify',${user.uId })">${user.uName }</a>
====
要通过用户名把用户的id传出去, JavaScript那里参数userId如果写死的数字可以传,
但是像上面这样写就报500的错了. 初学web. 求指教.
type Exception report

message For input string: "id"

description The server encountered an internal error that prevented
it from fulfilling this request.

Answer 1

${user.uId }是什么语法？我没见过，我用的是c#
如果${user.uId }是后台程序传过来的话你可以赋值给<input type="hidden" id="userId" value="${user.uName}">

然后
function doit(flag,id)
{
if(flag=="modify"){
var userId=document.getElementById('userId')
window.location.href="UserServlet?action=UserInfo&userId="+userId;
alert(userId }

}
如果你确定id是传过来了的，那么你的这句话有问题：
window.location.href="UserServlet?action=UserInfo&userId=id";
应该是
window.location.href="UserServlet?action=UserInfo&userId="+id;