【发布时间】：2019-07-28 22:15:01
【问题描述】：
我的 apache 主页抛出以下异常。我可以通过 URL 访问经理和其他页面。这甚至不是我的代码，也找不到任何具体的解决方案。我没有对默认设置进行任何更改，并且在我最后一次检查时它工作正常。 我主要通过 eclipse IDE 使用它进行开发，它从那里工作正常（因为我不必从那里访问主页）。
Type Exception Report
Message An exception occurred processing [index.jsp] at line [38]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing [index.jsp] at line [38]
35: <body>
36: <div id="wrapper">
37: <div id="navigation" class="curved container">
38: <span id="nav-home"><a href="${tomcatUrl}">Home</a></span>
39: <span id="nav-hosts"><a href="${tomcatDocUrl}">Documentation</a></span>
40: <span id="nav-config"><a href="${tomcatDocUrl}config/">Configuration</a></span>
41: <span id="nav-examples"><a href="${tomcatExamplesUrl}">Examples</a></span>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:625)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:499)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
javax.servlet.ServletException: java.lang.NoClassDefFoundError: javax/el/ELResolver
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:666)
org.apache.jsp.index_jsp._jspService(index_jsp.java:427)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.NoClassDefFoundError: javax/el/ELResolver
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:763)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
java.net.URLClassLoader.access$100(URLClassLoader.java:74)
java.net.URLClassLoader$1.run(URLClassLoader.java:369)
java.net.URLClassLoader$1.run(URLClassLoader.java:363)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:362)
java.lang.ClassLoader.loadClass(ClassLoader.java:424)
java.lang.ClassLoader.loadClass(ClassLoader.java:411)
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
java.lang.ClassLoader.loadClass(ClassLoader.java:411)
java.lang.ClassLoader.loadClass(ClassLoader.java:357)
org.apache.jasper.runtime.JspApplicationContextImpl.createELResolver(JspApplicationContextImpl.java:121)
org.apache.jasper.runtime.JspApplicationContextImpl.createELContext(JspApplicationContextImpl.java:90)
org.apache.jasper.runtime.PageContextImpl.getELContext(PageContextImpl.java:707)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:692)
org.apache.jsp.index_jsp._jspService(index_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.ClassNotFoundException: javax.el.ELResolver
java.net.URLClassLoader.findClass(URLClassLoader.java:382)
java.lang.ClassLoader.loadClass(ClassLoader.java:424)
java.lang.ClassLoader.loadClass(ClassLoader.java:357)
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:763)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
java.net.URLClassLoader.access$100(URLClassLoader.java:74)
java.net.URLClassLoader$1.run(URLClassLoader.java:369)
java.net.URLClassLoader$1.run(URLClassLoader.java:363)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:362)
java.lang.ClassLoader.loadClass(ClassLoader.java:424)
java.lang.ClassLoader.loadClass(ClassLoader.java:411)
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
java.lang.ClassLoader.loadClass(ClassLoader.java:411)
java.lang.ClassLoader.loadClass(ClassLoader.java:357)
org.apache.jasper.runtime.JspApplicationContextImpl.createELResolver(JspApplicationContextImpl.java:121)
org.apache.jasper.runtime.JspApplicationContextImpl.createELContext(JspApplicationContextImpl.java:90)
org.apache.jasper.runtime.PageContextImpl.getELContext(PageContextImpl.java:707)
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:692)
org.apache.jsp.index_jsp._jspService(index_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)`enter code here`
【问题讨论】：
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更新：由于某种原因，我无法在我的 tomcat 9 中使用表达式语言，它会抛出“初始化 org.apache.jasper.el.ELContextImp 失败”。
标签： tomcat9