Get all parameters of HTML form with getParameterNames()

In the first simple program Login Screen Validation, the data sent by the client is extracted from HttpServletRequest object req, using getParameter(String) method. The getParameter(String) method works to read a single text box (or any FORM field) only. The HttpServletRequest interface comes with another method getParameterNames() (inherited from ServletRequest interface) to read all the FORM […]