How to pass parameters in method expression – JSF 2.0
Since JSF 2.0, you are allow to pass parameter values in method expression like “#{bean.method(param)}“, but this feature will raising a “EL parsing error” on Tomcat server. For example,
Managed Bean
@ManagedBean(name="order")
@SessionScoped
public class OrderBean implements Serializable{
public String editAction(String id) {
//...
}
}
JSF page
//...
<h:commandLink value="Edit" action="#{order.editAction(123)}" />
//...
If deployed on Tomcat, it will hits following error messages :
An Error Occurred:
Error Parsing: #{order.editAction(123)}
or
javax.el.MethodNotFoundException
Solution
Actually, this so call “method expression parameters” is a feature of EL 2.2, which is NOT support in Tomcat by default.
In order to use this feature, you have to get “el-impl-2.2.jar” from Java.net, and put it into your project dependencies folder.
File : pom.xml
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>el-impl</artifactId>
<version>2.2</version>
</dependency>
Done, Tomcat should be able to support method expression parameters in JSF 2.0 web application.
About the Author
Leave a Reply
How to pass a tag like action=”#{order.editAction(#{order.orderObject})}” in the action where I have a method like editAction(Order order) in the backing bean?
This syntax is not valid. Instead, try #{order.editAction(order.orderObject)}. But even then, I’m not sure this makes sense. It seems like you’re trying to use the same class as both a bean and a business object.
Hi Mkyong,
I am using eclipse ide and tomcat 6 server. I followed the above steps included el-impl2.2 jar in lib directory of the project and configured the build path but same error is existing for me…plzz provide me solution for this!!!!!… FYI iam not using maven dependecny.
Thanks
Raghavendra
You site has been very helpful on my day to day development, thank you!
Have you any idea on how to put this to work on Websphere 7? I did what you told about Tomcat, but not worked on WS as expected.
This is my library
el-impl-2.2.jar
jsf-api.jar
jsf-impl.jar
jstl-api-1.2.jar
jstl-impl-1.2.jar
log4j-1.2.11.jar
I configured the EAR from RAD (Eclipse from IBM) to load libs from the project first (PARENT_LAST), so, it will load my libs before original WebSphere.
I don’t know you you find these esoteric solutions, but I certainly do appreciate your web pages. This simple update to pom.xml solved my problem.
[…] <version>2.2</version> </dependency> Note Similar issue – JSF2 – pass parameters in method expression This article is under – JSF 2 Tutorials , Tags: jsf2 mkyong Founder and Chief Editor […]
i am using jboss
geting error that el does not support method with parameter
An Error Occurred:
/default.xhtml @54,75 action=”#{order.deleteAction(o)}” Error Parsing: order.deleteAction(o)}
+- Stack Trace
javax.faces.view.facelets.TagAttributeException: /default.xhtml @54,75 action=”#{order.deleteAction(o)}” Error Parsing: #{order.deleteAction(o)}
at com.sun.faces.facelets.tag.TagAttributeImpl.getMethodExpression(TagAttributeImpl.java:225)
hello sir
i added “el-impl-2.2.jar” to lib folder
but still i am getting the same error parsing for method expression
for the given line only
plz give me some hint to solve the problem as i am using
netbeans 6.8 with jsf 2.0
May be you can try include the J2EE library “javaee.jar” in your netbean class path, it contains another set of el implementation classes.
Hello,
i have the same problem with my project[and the same error]. Sorry, can you be more explicit and explain how to include “javaee.jar” in netbeans class path..?
i try to add javaee.jar from project -> right click proprietes -> Compile -> addJar, i put “javaee.jar” and pressed Save.I select clear and build,run and nothing, the same error. Why? :( I wrong somewhere?
And this file “pom.xml” with this code :
org.glassfish.web
el-impl
2.2
where should be added?
Tnx
Check these two articles for the Eclipse dependencies configuration.
1. http://www.mkyong.com/maven/maven-dependency-libraries-not-deploy-in-eclipse-ide/
2. http://www.mkyong.com/maven/eclipse-web-deployment-assembly-maven-dependencies-issue/
Hi MKYong,
I am running this application in weblogic server. I am also hitting the same error. method parameter passing is not working. I added j2ee.jar also. No Luck!!!
Can you help me? Any Idea?
Regards,
Ilaya
[…] Backing bean… @ManagedBean(name="user") @SessionScoped public class UserBean{ public String editAction(String id) { //id = "delete" } } Note If you are deploy JSF application in servlet container like Tomcat, make sure you include the “el-impl-2.2.jar” properly. For detail, please read this article – JSF 2.0 method expression caused error in Tomcat. […]