How to set variable in jsp using jstl from input tag on same page?

Question

I want to do something like

<from action="#">
    <input type="number" name="id1">
    .......
<form>
<c:set var="quantity" value="//value from input field here"/>

Is it possible?
Note: whole code is a single jsp file

Answer 1

假设您要获取input的提交值，可以执行以下操作：

<c:set var="user" value="${param.id1}" />