Function « EL « JSP-Servlet Q&A

1. Is there an eval function for JSP EL? stackoverflow.com

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 coderanch.com

3. Clarrifications on EL function coderanch.com

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 com.study.DiceRoller int roll() /******************************************/ Jsp file to call the EL function /******************************************/ <%@ page isELIgnored="false" %> <%@ taglib prefix="mine" uri="DiceRoller" %> ...

4. el function and javascript coderanch.com

5. Custom EL Function problems coderanch.com

I am having trouble getting a custom EL function working. Here is my pipemonitor.tld file. http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd" 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 coderanch.com

7. Problem with EL Functions coderanch.com

exception org.apache.jasper.JasperException: java.lang.NullPointerException org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) root cause java.lang.NullPointerException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.el.parser.AstFunction.getValue(AstFunction.java:94) at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:923) at org.apache.jsp.custTag_jsp._jspService(custTag_jsp.java:74) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.valves.RequestDumperValve.invoke(RequestDumperValve.java:151) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at ...

8. problem with EL functions coderanch.com

9. EL functions information coderanch.com

10. Writing EL Function coderanch.com

11. Missing a bit in FAQ on EL functions coderanch.com

12. Passing a primitive to an EL function coderanch.com

13. EL functions coderanch.com

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 ...