context: /jsf2nd delegate: false repositories: /WEB-INF/classes/ ----------> Parent Classloade

context: /jsf2nd delegate: false repositories: /WEB-INF/classes/ ----------> Parent Classloader: org.apache.catalina.loader.StandardClassLoader@1172e08 javax.faces.webapp.FacesServlet java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4421) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4734) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) at org.apache.catalina.core.StandardService.start(StandardService.java:525) at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) at org.apache.catalina.startup.Catalina.start(Catalina.java:595) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) 2011-12-8 9:11:27 org.apache.catalina.core.StandardContext loadOnStartup 嚴(yán)重: Servlet /jsf2nd threw load() exception java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4421) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4734) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) at org.apache.catalina.core.StandardService.start(StandardService.java:525) at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) at org.apache.catalina.startup.Catalina.start(Catalina.java:595) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

網(wǎng)上搜了幾種解決方案：1、關(guān)掉myeclipse，把原來(lái)的tomcat換掉，如果是安裝版的就卸載，重新放一個(gè)tomcat，啟動(dòng)myeclipse，配置tomcat，部署，再啟動(dòng)tomcat，一切OK。2、之前jar包我是通過(guò)Build path -> Configure build path-> Add External JARs的方式添加的，程序編譯，Tomcat啟動(dòng)都很正常，沒(méi)有錯(cuò)誤。可是一訪問(wèn)jsp頁(yè)面就報(bào)上述錯(cuò)誤。 苦思不得其解，但看了錯(cuò)誤信息說(shuō)是找不到org.springframework.web.servlet.DispatcherServlet類(lèi)，所以我就干脆將spring.jar,spring-webmvc.jar等jar包通通手工添加到/WEB-INF/lib目錄下，并且將default output folder值改為projectName/WebContent/WEB-INF/classes 問(wèn)題就得以解決了。

這兩種解決方案試了都不行，但是大體了解到可能是jar包沒(méi)有導(dǎo)入進(jìn)去，所以進(jìn)了eclipse的工程目錄，找到對(duì)應(yīng)的存放jar包的目錄：.metadata.pluginsorg.eclipse.wst.server.coretmp3wtpwebappsjsf2ndWEB-INFlib，發(fā)現(xiàn)果然少了兩個(gè)jar包，將之放入后問(wèn)題就解決了。

錯(cuò)誤原因：至今未能查明究竟是哪個(gè)地方出錯(cuò)了才使得eclipse不能將jar包放到eclipse的tomcat插件下面。

可能的幾個(gè)原因：1、我的eclipse選擇的默認(rèn)編譯是jdk1.5，而這個(gè)項(xiàng)目用的是Tomcat6, 2、我的Eclipse里面默認(rèn)設(shè)置的tomcat的編譯器也是1.5