Question

Inside a POST in a .jsp file, I’d like to do something like this:

<input type="text" name="...">

And inside the servlet I’d like to do:

request.getParameter(...)

Now where should and how should I declare “…” so that I can avoid duplication and reuse the same String.

Should this go in an interface like this:

public interface SO {

String POST_PARAM = "userinput";

}

Or in a property file? Or …?

In any case, how do I then access this from the .jsp and from the .java file?

Answer 1

You can define constants like final String POST_PARAM = "userinput"; and then use them in markup: <input type="text" name="<%=POST_PARAM%>">.
Moving fields names to properties file does not sound as a beneficial unless you have reasons to do this.

To get parameter value from HTTP request caused by form submit say request.getParameter(POST_PARAM).

I hope this helps.