jsp

How to show user-friendly error page in browser when runtime exception is thrown by servlet?

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Just declare an <error-page> in web.xml wherein you can specify the page which should be displayed on a certain Throwable (or any of its subclasses) or a HTTP status code. E.g. <error-page> <exception-type>java.lang.Exception</exception-type> <location>/error.jsp</location> </error-page> which will display the error page on any subclass of the java.lang.Exception, but thus not java.lang.Throwable or java.lang.Error. This way … Read more

How to output HTML from JSP block?

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You can’t use the ‘out’ variable (nor any of the other “predeclared” scriptlet variables) inside directives. The JSP page gets translated by your webserver into a Java servlet. Inside tomcats, for instance, everything inside scriptlets (which start “<%”), along with all the static HTML, gets translated into one giant Java method which writes your page, … Read more

Ternary operator in JSTL/EL

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I tested the following page in Tomcat 5.59, JSP 2.0 and JSTL 1.1. It ran without any errors. <%@taglib uri=”http://java.sun.com/jsp/jstl/core” prefix=”c”%> <c:set var=”value” scope=”request” value=”someValue”/> <c:out default=”None” escapeXml=”true” value=”${not empty value ? value : ‘None’}” /> <c:out default=”None” escapeXml=”true” value=”${empty value ? ‘None’ : value}” /> <c:set var=”value” scope=”request” value=”” /> <br/> <c:out default=”None” escapeXml=”true” … Read more

Get request URL in JSP which is forwarded by Servlet

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If you use RequestDispatcher.forward() to route the request from controller to the view, then request URI is exposed as a request attribute named javax.servlet.forward.request_uri. So, you can use request.getAttribute(“javax.servlet.forward.request_uri”) or ${requestScope[‘javax.servlet.forward.request_uri’]}

Eclipse RCP plugin + embedded Jetty + JSF

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Take a look at setting a context in jetty. You can define it before start your server. public class OneWebApp { public static void main(String[] args) throws Exception { String jetty_home = System.getProperty(“jetty.home”,”..”); Server server = new Server(8080); WebAppContext webapp = new WebAppContext(); webapp.setContextPath(“https://stackoverflow.com/”); webapp.setWar(jetty_home+”/webapps/test.war”); server.setHandler(webapp); server.start(); server.join(); } }