<%@ page import = “java.util.Map” %> Map<String, String[]> parameters = request.getParameterMap(); for(String parameter : parameters.keySet()) { if(parameter.toLowerCase().startsWith(“question”)) { String[] values = parameters.get(parameter); //your code here } }
eq exists (as well as ne, lt, etc) so you can avoid using XML entity references (< is an XML character and would need to be escaped as <, for example), but they do the same thing. See Comparison operators in JSP for more info.
Get rid of any servletcontainer-specific libraries such as jsp-api.jar in your /WEB-INF/lib folder. This exception indicates that you’ve put servletcontainer-specific libraries of a container which supports only Servlet 2.4 / JSP 2.0 or older in there (the getJspApplicationContext() method was introduced in Servlet 2.5 / JSP 2.1). This is a major mistake. Those libraries don’t … Read more
JSP is a technology similar to ASP that let you embed Java code inside HTML pages. This code can be inserted by means of <% %> blocks or by means of JSP tags. The last option is generally preferred over the first one, since tags adapt better to own tag representation form of HTML, so … Read more
True, JSP has some templating capabilities, but the biggest disadvantage of using JSP in JSF is that JSP writes to the response as soon as it encounters template text content, while JSF would like to do some pre/post processing with it. In JSF 1.0/1.1 the following JSF code <h:outputText value=”first”/> second <h:outputText value=”third”/> fourth would … Read more
This isn’t a bug, it’s by design. When a new session is created, the server isn’t sure if the client supports cookies or not, and so it generates a cookie as well as the jsessionid on the URL. When the client comes back the second time, and presents the cookie, the server knows the jsessionid … Read more
The issue is that the Tomcat admin port was not defined. You need to have it as an actual number such as 9000 rather than as a hyphen -.
You should use single quotes on the value parameter, ie: value=”<%=request.getParameter(“userName”)%>” or set the org.apache.jasper.compiler.Parser.STRICT_QUOTE_ESCAPING parameter to false as described here: http://blogs.sourceallies.com/2009/10/strict-quote-escaping-in-tomcat/
JSTL variables are actually attributes, and by default are scoped at the page context level. As a result, if you need to access a JSTL variable value in a scriptlet, you can do so by calling the getAttribute() method on the appropriately scoped object (usually pageContext and request). resp = resp + (String)pageContext.getAttribute(“test”); Full code … Read more
<c:if is a simple if-clause. <c:when> has options for multiple if-clauses and an else clause. Compare: <c:if test=”${foo == ‘bar’}”>…</c:if> with <c:choose> <c:when test=”${foo == ‘bar’}”>…</c:when> <c:when test=”${foo == ‘baz’}”>…</c:when> <c:otherwise>…</c:otherwise> </c:choose>