Some times the list of parameters passed to a JSP page can be quite long. Of course, you can display the parameters in the address bar by changing your method to POST, but when you have a lot or parameters, this can be cumbersome. The following code will allow you to display all parameters provided; each on their own line.
<% java.util.Enumeration params = request.getParameterNames(); while(params.hasMoreElements()) { String paramName = (String) params.nextElement(); String paramValue = request.getParameter(paramName); %> <%=paramName%> has a value <%=paramValue%><br /> <% } %>