Introduction
In JSP’s you need to be careful with request params since they can cause errors. This example shows how to prevent nullpointer exceptions:
<%@ page Page="page.jsp" %> <% if (request.getParameter("param").equals("value")) { // ... } // The test above will throw a // NullPointerException if param is // not part of the query string. A better // implementation would be: if ("value".equals(request.getParameter("param"))) { // ... } %>