Function « EL « JSP-Servlet Q&A

1. Is there an eval function for JSP EL?

I'm looking for a way to evaluate a string as el when it is output in a JSP page. (i guess when it's toString() method is called under the hood???) For example, ...

2. wierd exception in EL function

3. Clarrifications on EL function

Hi All, I am new to EL in JPS. i try to run the following EL function. /*********************/ DiceRoller.tld /**********************/ 1.2 2.0 DiceRoller rollIt int roll() /******************************************/ Jsp file to call the EL function /******************************************/ <%@ page isELIgnored="false" %> <%@ taglib prefix="mine" uri="DiceRoller" %> ...

4. el function and javascript

5. Custom EL Function problems

I am having trouble getting a custom EL function working. Here is my pipemonitor.tld file." version="2.0"> NSClientFunctions 1.0 nsclient NSClientFunctions cpu com.rbs.pipemonitor.model.NSClientHelper java.lang.String getCpuUsage() Here is the .java file. package com.rbs.pipemonitor.model; import org.nsclient4j.NSClient4JException; import org.nsclient4j.NSClient4j; public class NSClientHelper { public static String getCpuUsage() { NSClient4j ...

6. Custom EL Function Exceptions

7. Problem with EL Functions

exception org.apache.jasper.JasperException: java.lang.NullPointerException org.apache.jasper.servlet.JspServletWrapper.handleJspException( org.apache.jasper.servlet.JspServletWrapper.service( org.apache.jasper.servlet.JspServlet.serviceJspFile( org.apache.jasper.servlet.JspServlet.service( javax.servlet.http.HttpServlet.service( root cause java.lang.NullPointerException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke( at sun.reflect.DelegatingMethodAccessorImpl.invoke( at java.lang.reflect.Method.invoke( at org.apache.el.parser.AstFunction.getValue( at org.apache.el.ValueExpressionImpl.getValue( at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate( at org.apache.jsp.custTag_jsp._jspService( at org.apache.jasper.runtime.HttpJspBase.service( at javax.servlet.http.HttpServlet.service( at org.apache.jasper.servlet.JspServletWrapper.service( at org.apache.jasper.servlet.JspServlet.serviceJspFile( at org.apache.jasper.servlet.JspServlet.service( at javax.servlet.http.HttpServlet.service( at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( at org.apache.catalina.core.ApplicationFilterChain.doFilter( at org.apache.catalina.core.StandardWrapperValve.invoke( at org.apache.catalina.core.StandardContextValve.invoke( at org.apache.catalina.core.StandardHostValve.invoke( at org.apache.catalina.valves.ErrorReportValve.invoke( at org.apache.catalina.core.StandardEngineValve.invoke( at org.apache.catalina.valves.RequestDumperValve.invoke( at org.apache.catalina.connector.CoyoteAdapter.service( at org.apache.coyote.http11.Http11Processor.process( at ...

8. problem with EL functions

9. EL functions information

10. Writing EL Function

11. Missing a bit in FAQ on EL functions

12. Passing a primitive to an EL function

13. EL functions

Question: A web based application for a major online movie rental retailer stores a List as a session attribute to contain movies the user has requested. A random, embedded movie trailer from this list must display on the users main page every time the users main page is viewed. Management thinks a similar feature will be needed in the near future ...

15. EL Function question