Google App Engine不会解析JSF 2.0标记

我在AppEngine上运行JSF 2.0时遇到问题。 我有以下index.xhtml ，如果我部署它并打开页面，除了标题之外什么都没有，页面的源代码完全和它所写的一样 – 没有从到任何变化。

index.xhtml

appengine-web.xml

   app 1 true      

web.xml

   Task Manager Internal task manager   javax.faces.STATE_SAVING_METHOD client    javax.faces.PROJECT_STAGE Production   javax.faces.DEFAULT_SUFFIX .xhtml    com.sun.faces.enableThreading false    Faces Servlet javax.faces.webapp.FacesServlet 1   Faces Servlet /faces/*    30   index.xhtml   

更改后的Stacktrace

 W 2011-06-25 03:13:11.763 EXCEPTION java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet at com.google.appengine.runtime.Request.process-32c47fe3ad43decc(Request.java) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) at org.mortbay.util.Loader.loadClass(Loader.java:91) at org.mortbay.util.Loader.loadClass(Loader.java:71) at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:73) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:422) at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448) at com.google.tracing.TraceContext.runInContext(TraceContext.java:688) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) E 2011-06-25 03:13:11.766 javax.servlet.ServletContext log: unavailable javax.servlet.UnavailableException: javax.faces.webapp.FacesServlet at org.mortbay.jetty.servlet.Holder.doStart(Holder.java:79) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:242) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:202) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:171) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9673) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:422) at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448) at com.google.tracing.TraceContext.runInContext(TraceContext.java:688) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) W 2011-06-25 03:13:11.768 Failed startup of context com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@11d2066{/,/base/data/home/apps/s~cse-info/1.351380543505614038} java.lang.NullPointerException at java.lang.Class.isAssignableFrom(Native Method) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:202) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:171) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9673) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:422) at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448) at com.google.tracing.TraceContext.runInContext(TraceContext.java:688) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) C 2011-06-25 03:13:11.775 Uncaught exception from servlet javax.servlet.UnavailableException: Initialization failed. at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:211) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:171) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9673) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:422) at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573) at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448) at com.google.tracing.TraceContext.runInContext(TraceContext.java:688) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326) at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318) at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:636) 

Answer 1

如果Faces Servlet没有处理请求并且没有特别关于GAE的请求，则通常会发生这种情况。

您用于访问网页的url是什么？ 由于您声明了前缀映射，因此必须在URL中插入/ faces /，例如my.appspot.com/faces/mypage.xhtml。

我建议使用后缀映射并专门使用.xhtml：

  facesServlet *.xhtml  

Answer 2

如果您在浏览器地址栏中的请求URL与在web.xml中定义的FacesServlet的URL模式不匹配，则会发生这种情况。 它是负责解析Facelet文件，创建FacesContext并完成所有JSF工作的人。

您已将FacesServlet映射到/faces/* ，这意味着您必须在请求URL中的上下文路径之后包含/faces/才能使其运行。 即

http://example.com/contextpath/faces/index.xhtml

或者，您也可以将URL模式更改为

 *.xhtml 

这样所有XHTML（Facelet）文件无论如何都将由FacesServlet解析。

Answer 3

查看此链接以获取MyFaces和GAE支持 。 它有一些关于如何正确设置此环境的提示，如果您需要更多信息，可以使用MyFaces用户邮件列表 。 要在GAE上查看使用JSF的运行示例，请检查此链接MyFaces HTML5 Demo