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我有一个 JSP，它是另一个 JSP 中包含的 JSP。

在运行时，如果我将光标保持在文本框中并按回车键，则会出现以下异常。

我的子 JSP 中的输入字段如下。

    <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)
4

1 回答 1

0

仔细查看根本原因（最底层的异常）：

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)

你有一个..manage/process/activity/holder.jsp文件，它使用了在解析上下文相对路径期间以某种方式导致<jsp:include>的。srcNullPointerException

我可以想到两个可能的原因：

  1. src本身null就是。这可能发生在动态包括如下：

    <jsp:include src="${someBean.someInclude}" />

    如果您确实有这样的包含，则需要确保它src永远不会评估为null.

  2. webapp 的运行时类路径被从不同的 servletcontainer make/version 任意下载的文件污染，jsp-api.jar这与 servletcontainer（在您的情况下，Jetty 的）自己的内部库冲突。

    如果您确实这样做了，您需要摆脱它们并确保运行时类路径没有重复的旧版本的特定于 servletcontainer 的库。另请参阅如何在我的 Eclipse 项目中导入 javax.servlet API？

于 2013-08-08T00:46:00.950 回答