index jsp lt form method post action backend jsp gt lt input type text name one gt lt input type submit value Submit gt lt form gt In backend jsp what does request getParameter one return request getParameter one getClass getName returns java lang String so it must be a String right However I cannot do String one request getParameter one if equals one or if one null This is obvious because variable one does not return null Is if one length gt 0 only way to go or are there better solutions or a better approach I am considering both solutions to be on jsp Using a servlet although jsp is a servlet is a different use case in this scenario

What does request.getParameter return?

The Solution to What does request.getParameter return? is

Returns the value of a request parameter as a String, or null if the parameter does not exist.

Do note that it is possible to submit an empty parameter - such that the parameter exists, but has no value. For example, I could include &log=&somethingElse into the URL to enable logging, without needing to specify &log=true. In this case, the value will be an empty String ("").

~ Answered on 2011-12-08 02:15:34

What does request.getParameter return?

The Solution to What does request.getParameter return? is

Most Viewed Questions: