剛學struts照著書本和網上的很多小例子來測試自己的struts配置的對不對，但是總是遇到404錯誤下面是我導入的jar包。（把struts的jar包做成了user Libraries，在工程的build path直接導入的，反正跟直接粘貼在web-inf/lib下結果都一樣）下面是web.xml內容<?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_2_5.xsd"?id="WebApp_ID"?version="2.5"> ??<display-name>12</display-name> ???<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> ??<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> </web-app>這是Struts.xml內容 <?xml?version="1.0"?encoding="UTF-8"??> <!DOCTYPE?struts?PUBLIC "-//Apache?Software?Foundation//DTD?Struts?Configuration?2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> ????<package?name="default"?namespace="/"?extends="struts-default"> <action?name="Test"?class="com.action.Test"> ????????????<result?name="success">/helloworld.jsp</result> ????????</action> ????</package> ????<!--?Add?packages?here?--> </struts>這是報錯信息十二月 14, 2017 9:35:10 下午 org.apache.catalina.startup.SetContextPropertiesRule begin警告: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.jee.server:12' did not find a matching property.十二月 14, 2017 9:35:11 下午 org.apache.catalina.core.StandardContext filterStart嚴重: Exception starting filter struts2java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)。。。。十二月 14, 2017 9:35:11 下午 org.apache.catalina.core.StandardContext startInternal嚴重: One or more Filters failed to start. Full details will be found in the appropriate container log file十二月 14, 2017 9:35:11 下午 org.apache.catalina.core.StandardContext startInternal嚴重: Context [/12] startup failed due to previous errors十二月 14, 2017 9:35:11 下午 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deployment of configuration descriptor C:\Users\Administrator\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\12.xml has finished in 204 ms十二月 14, 2017 9:35:11 下午 org.apache.catalina.startup.HostConfig deployDescriptor信息: Deploying configuration descriptor C:\Users\Administrator\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\struts2-blank.xml十二月 14, 2017 9:35:11 下午 org.apache.catalina.startup.SetContextPropertiesRule begin警告: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.j2ee.server:struts2-blank' did not find a matching property.十二月 14, 2017 9:35:12 下午 org.apache.catalina.startup.TldConfig execute信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.2017-12-14 21:35:13,091 DEBUG [localhost-startStop-1] log4j2.Log4j2Logger (Log4j2Logger.java:73) - Found following implementations of FileManager interface: [system, jboss]。。。。我在網上找很久解決辦法。也都試了。。并沒有用。是我工程就建的不對么？求指點一下，剛開始學就卡住了。。。