javax.faces.FacesException，當用戶點擊返回

我有一個JSP，它是另一個JSP中包含的JSP。javax.faces.FacesException，當用戶點擊返回

在運行期間，如果我將光標放在文本框內並返回，我會得到以下異常。

我的子JSP中的輸入字段如下。

<input type="text" id="mask" name="mask" value="<%=mask%>" size="30"/>

例外：

javax.faces.FacesException 
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:388) 
    at com.soa.console.faces.myfaces.MyFacesServlet.service(MyFacesServlet.java:262) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.common.console.CrossSiteScriptingValidator.doFilter(CrossSiteScriptingValidator.java:129) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SecuritySessionServletFilter.doFilter(SecuritySessionServletFilter.java:80) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SessionValidatorFilter.doFilter(SessionValidatorFilter.java:114) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.RequestAttributesFilter.doFilter(RequestAttributesFilter.java:43) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.ParameterToSessionPersisterFilter.doFilter(ParameterToSessionPersisterFilter.java:63) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:67) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.Server.handle(Server.java:367) 
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486) 
    at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926) 
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988) 
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640) 
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) 
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.io.IOException 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:291) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:293) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:120) 
    at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416) 
    at com.soa.console.faces.config.impl.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:124) 
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
    ... 39 more 
Caused by: java.lang.NullPointerException 
    at org.apache.jasper.runtime.JspRuntimeLibrary.getContextRelativePath(JspRuntimeLibrary.java:907) 
    at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:962) 
    at com.soa.jsp.dev.wizards.routing.manage_005fprocess_005factivity_005fholder_jsp._jspService(manage_005fprocess_005factivity_005fholder_jsp.java:176) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.dev.filter.JspCompilationFilter.doFilter(JspCompilationFilter.java:137) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    ... 48 more 

Caused by: 

java.io.IOException 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:291) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:293) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:120) 
    at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416) 
    at com.soa.console.faces.config.impl.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:124) 
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
    at com.soa.console.faces.myfaces.MyFacesServlet.service(MyFacesServlet.java:262) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.common.console.CrossSiteScriptingValidator.doFilter(CrossSiteScriptingValidator.java:129) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SecuritySessionServletFilter.doFilter(SecuritySessionServletFilter.java:80) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SessionValidatorFilter.doFilter(SessionValidatorFilter.java:114) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.RequestAttributesFilter.doFilter(RequestAttributesFilter.java:43) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.ParameterToSessionPersisterFilter.doFilter(ParameterToSessionPersisterFilter.java:63) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:67) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.Server.handle(Server.java:367) 
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486) 
    at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926) 
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988) 
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640) 
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) 
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.lang.NullPointerException 
    at org.apache.jasper.runtime.JspRuntimeLibrary.getContextRelativePath(JspRuntimeLibrary.java:907) 
    at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:962) 
    at com.soa.jsp.dev.wizards.routing.manage_005fprocess_005factivity_005fholder_jsp._jspService(manage_005fprocess_005factivity_005fholder_jsp.java:176) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.dev.filter.JspCompilationFilter.doFilter(JspCompilationFilter.java:137) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    ... 48 more 

Caused by: 

java.lang.NullPointerException 
    at org.apache.jasper.runtime.JspRuntimeLibrary.getContextRelativePath(JspRuntimeLibrary.java:907) 
    at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:962) 
    at com.soa.jsp.dev.wizards.routing.manage_005fprocess_005factivity_005fholder_jsp._jspService(manage_005fprocess_005factivity_005fholder_jsp.java:176) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.dev.filter.JspCompilationFilter.doFilter(JspCompilationFilter.java:137) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:293) 
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:120) 
    at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416) 
    at com.soa.console.faces.config.impl.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:124) 
    at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384) 
    at com.soa.console.faces.myfaces.MyFacesServlet.service(MyFacesServlet.java:262) 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320) 
    at com.soa.common.console.CrossSiteScriptingValidator.doFilter(CrossSiteScriptingValidator.java:129) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SecuritySessionServletFilter.doFilter(SecuritySessionServletFilter.java:80) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.SessionValidatorFilter.doFilter(SessionValidatorFilter.java:114) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.RequestAttributesFilter.doFilter(RequestAttributesFilter.java:43) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at com.soa.common.console.ParameterToSessionPersisterFilter.doFilter(ParameterToSessionPersisterFilter.java:63) 
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291) 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:443) 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225) 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044) 
    at com.soa.transport.jetty.j2ee.HttpContextAppHandler.doHandle(HttpContextAppHandler.java:278) 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372) 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978) 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) 
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.handler.RequestLogHandler.handle(RequestLogHandler.java:67) 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) 
    at org.eclipse.jetty.server.Server.handle(Server.java:367) 
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486) 
    at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926) 
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988) 
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:640) 
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) 
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628) 
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source)

來源

2013-08-06 Parag A

哪裏有問題的根源呢？ – BalusC

我很抱歉。我現在更新了例外。 –

看的根本原因（最底部的除外）接近：

java.lang.NullPointerException 
    at org.apache.jasper.runtime.JspRuntimeLibrary.getContextRelativePath(JspRuntimeLibrary.java:907) 
    at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:962) 
    at com.soa.jsp.dev.wizards.routing.manage_005fprocess_005factivity_005fholder_jsp._jspService(manage_005fprocess_005factivity_005fholder_jsp.java:176)

你已經一個..manage/process/activity/holder.jsp文件，它使用<jsp:include>其src造成NullPointerException在解析上下文相對路徑時以某種方式。

我能想到的2個可能的原因：

的src本身null。這可能發生在一個動態的包括像如下：
```
<jsp:include src="${someBean.someInclude}" /> 
```
如果確實有這樣的包含，你需要確保其src從不計算爲null。
webapp的運行時類路徑受到任意下載的jsp-api.jar文件的污染，該文件來自與ServletContainer（在您的情況下爲Jetty的）自己的內部庫衝突的不同servletcontainer make/version。

如果你確實已經這樣做了，你需要擺脫它們，並確保運行時類路徑沒有重複的早期版本化的servletcontainer特定的庫。同樣參見相關問題的答案How do I import the javax.servlet API in my Eclipse project?

來源

2013-08-08 00:46:00 BalusC

javax.faces.FacesException，當用戶點擊返回

回答

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