为什么我不能在表单中使用request.getParameter

Question

i have a question about using request.getParameter() , i knew that it can use to post the value using request.getParameter, Is it necessary match request.getParameter and <input> ???

My original code in HTML:

<INPUT type=submit name="submit" value="download">

In JSP:

String start = request.getParameter("submit");

Now I want to change a button and use div

div name="submit"id="submit" class="btnStyleFunc"
onclick="document.body.style.cursor='wait';this.disabled='true';
document.getElementById('form').submit();">

But it doesn't work, anyone can help me ?

---

Now i use the method below, but another problem is raised...the action does not stop...

String start = request.getParameter("submit1");

<input type=hidden name=submit1 value=download>
<div class="btnStyleFunc" onclick="document.body.style.cursor='wait';
this.disabled='true';document.getElementById('form').submit();">

Does anyone know what the problem is ?

Answer 1

A clicked submit button is a successful form control and its name/value pair will be submitted to the server in the form data.

If you submit a form with JavaScript, there is no clicked submit button, so it won't appear in the data. A div cannot have a name and is not a form control anyway — it isn't a submit button, even if it triggers JavaScript that submits the form.

Using a div with JavaScript also breaks the form for:

• Anyone not using a mouse/trackpad/etc to navigate the page (a div won't get the focus when tabbing through interactive elements)
• Anyone with JavaScript disabled
• Anyone using a screen reader in forms mode (div elements are not form controls).

Use a real submit button instead.