异常启动过滤器 struts2 java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter [英] Exception starting filter struts2 java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

问题描述

刚开始学习struts2，尝试部署到tomcat时遇到以下错误

I just started learning struts2 when I am trying to deploy to tomcat I am encountering the following error

Exception starting filter struts2
java.lang.ClassNotFoundException:org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

我浏览了其他几个帖子，但我无法解决问题，请帮助我..非常感谢！

I went through couple of other posts but I am unable to resolve the issue please help me.. Thanks much !

/这里是我使用的 web.xml 文件/

/here is the web.xml file I am using/

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Struts2Start</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

/Struts.xml/

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
   <package name="default" extends="struts-default">
    <action name="getTutorial" class="com.javabrains.struts.action.TutorialAction">
      <result name="success">/success.jsp</result>
      <result name="error">/error.jsp</result>
    </action>
   </package>
</struts>

/控制台/

/console/

SEVERE: Exception starting filter struts2
java.lang.ClassNotFoundException:     org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:107)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4775)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5452)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:656)
at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1635)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

推荐答案

我发现我的问题是我忘记导出用户定义的库，在本例中为 struts 库.您可以通过 Eclipse 通过

I figured out my problem was that I forgot to export my user defined libraries, in this case, struts libraries. You can export the libraries via Eclipse by

1. 转到标记"选项卡(如果看不到，请执行Windows">显示视图">标记")
2. 展开类路径依赖验证器消息"
3. 右键单击将不会导出或发布类路径条目 org.eclipse.jdt.USER_LIBRARY/struts2.可能会导致运行时 ClassNotFoundExceptions."
4. 点击快速修复"
5. 选择将关联的原始类路径条目标记为发布/导出依赖项."
6. 点击完成"

这篇关于异常启动过滤器 struts2 java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！