java - Tomcat 7 javax.el.E​​LException 异常

Question

今天重启了httpd和tomcat服务，重启之后。我收到了以下消息。

我看到了这个帖子 http://www.coderanch.com/t/592922/Tomcat/enable-el-api-jar-ver

然后按照他们说的去做。我检查了一下，el-api.jar 在那里。我检查了另一台服务器，tomcat 也运行良好。

服务器是 Centos 6.4(最终版)和 Tomcat 7.0.23。

我尝试了一切，甚至替换了 jar 文件，但似乎没有任何效果。

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: javax.el.ELException: Provider com.sun.el.ExpressionFactoryImpl not found
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:585)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:396)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

javax.el.ELException: Provider com.sun.el.ExpressionFactoryImpl not found
    javax.el.FactoryFinder.newInstance(FactoryFinder.java:101)
    javax.el.FactoryFinder.find(FactoryFinder.java:197)
    javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:189)
    javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:160)
    org.apache.jasper.runtime.JspApplicationContextImpl.getExpressionFactory(JspApplicationContextImpl.java:108)
    org.apache.jsp.index_jsp._jspInit(index_jsp.java:31)
    org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:49)
    org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:180)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

java.lang.ClassNotFoundException: com.sun.el.ExpressionFactoryImpl
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1533)
    javax.el.FactoryFinder.newInstance(FactoryFinder.java:87)
    javax.el.FactoryFinder.find(FactoryFinder.java:197)
    javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:189)
    javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:160)
    org.apache.jasper.runtime.JspApplicationContextImpl.getExpressionFactory(JspApplicationContextImpl.java:108)
    org.apache.jsp.index_jsp._jspInit(index_jsp.java:31)
    org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:49)
    org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:180)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.23 logs.

Answer 1

请确保您在 ${TOMCAT_HOME}/lib 中拥有这两个 jar

el-api-2.2.jar // jar version could differ
el-impl-2.2.jar