request.setParameter in JSP

Question

I tried to do in JSP action will determine the value of a text field and saw no action request.setParameter. I tried to search online solutions and unfortunately I did not find.

I'd love to help, thanks in advance.

Do you want to sanitize a full HTTP request (though this should not utterly be required in your use-case)? There is no such method as `request.setParameter()` associated with an `HttpServletRequest` class (This is deliberate). If you want to modify request parameters then, you need to customize/sanitize `HttpServletRequest` itself by wrapping it around `HttpServletRequestWrapper` basically by using a `Filter`. [Example](http://stackoverflow.com/q/1413129/1391249). — Tiny, Jan 01 '15 at 15:07

score 0 · Answer 1 · answered Jan 01 '15 at 14:32

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request.setParameter - is relevant when you're putting some parameter inside the HTML header.
In order to set the text inside the text field you should have a look here: http://www.w3schools.com/tags/tag_input.asp

answered Jan 01 '15 at 14:32

roeygol

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Yes, but how do you determine the value only with jsp? – Ofir Jan 01 '15 at 17:36

score 0 · Accepted Answer · edited Jan 02 '15 at 04:58

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The input is sent to whatever the your forms 'action' attribute is. Lets say you have the following code

<form action="login.jsp" method="post">
    <lable><b>Username</b></label>
    <input type="text" name="username">
    <label><b>Password</b></label>
    <input type="password" name="password">
    <button type="submit">Login</button>
</form>

This means that, when your form is submitted, your login.jsp receives a POST request with those variables, these are accessible via the request (HttpServletRequest) object

For example, with the above code, you could use request.getParamater("username") to get the input supplied in the username field.

edited Jan 02 '15 at 04:58

Tiny

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answered Jan 01 '15 at 18:49

Zachary Craig

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First of all, thank you. I was going to **setParameter** not to getParameter. You have an idea how can I do it? – Ofir Jan 01 '15 at 19:27
Set parameter is for changing pre-existing or new parameters, usually you would do that in a filter for thigs like input validation – Zachary Craig Jan 01 '15 at 20:42
Yes, I would like to change pre-existing parameters. What is the code for that? – Ofir Jan 02 '15 at 14:20
Just use the setParameter method with a key and value, am i not understanding something? – Zachary Craig Jan 02 '15 at 18:56
There setParameter to jsp? – Ofir Jan 02 '15 at 18:59

request.setParameter in JSP

2 Answers2