问题
I am attempting to run a project with a servlet that was working a few weeks ago (no modifications have been made since). However, when I run it I now get the following error:
java.lang.ClassNotFoundException: javax.el.StaticFieldELResolver
I've seen similar questions out there such as this one, but their solutions did not work for me. I've tried the following unsuccessfully:
- Removing all other library references other than JDK 1.7 and Apache Tomcat 7.0.41.0
- Updating the
web.xmlfile from 2.5 to 3.0:<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> - Updating the
sun-web.xmlfile from 2.5 to 3.0:<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 9.0 Servlet 3.0//EN" "http://www.sun.com/software/appserver/dtds/sun-web-app_3_0-0.dtd"> - Verifying that the Tomcat library includes
el-api.jarandjsp-api.jar - Setting the
CATALINA_HOMEenvironment variable to point to the Tomcat directory
The IDE being used is NetBeans 7.4 running Apache Tomcat 7.0.41.0 with Java 7. Any help is greatly appreciated.
UPDATE:
Oddly, if I choose to run it with GlassFish instead of Tomcat it runs without error. So there must be some relationship to the Tomcat server.
回答1:
The class javax.el.StaticFieldELResolver is part of the EL 3.0 API. AFAIK it is not available in Tomcat 7 versions. It is available in Tomcat 8, but that is not in General Availability yet, so use it as your own risks.
You must have changed something.
回答2:
Solution 1: Inner of the apache-tomcat-x.x.xx\lib folder el-api.jar file set classpath environment variable.
Solution 2: copy apache-tomcat-x.x.xx\lib\el-api.jar file in to jreX.X.X_XXX\lib\ext\ folder.
because it is used to preload tomcat server start
来源：https://stackoverflow.com/questions/19746046/java-lang-classnotfoundexception-javax-el-staticfieldelresolver