xml-java。网尝试应用样式表时出错

Question

我在尝试使用样式表时遇到问题，它会导致以下错误：

07-Jul-2015 16:06:53.811 INFO [http-apr-8084-exec-7] mx.com.vw.servlet.filters.StylizerFilter.doFilter Stylizing: xslt/semaphore.xsl with download: false filename:null mimetype:text/html
---
CONSULTA
(Ubicación del error desconocida)java.net.MalformedURLException
java.lang.NullPointerException
    at mx.com.vw.servlet.filters.StylizerFilter.doFilter(StylizerFilter.java:120)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2463)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2452)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

在我的索引中，我请求servlet的结果并应用此样式表，sintax如下：

<iframe src="${pageContext.request.contextPath}/semaphore?cmd=retrieve&stylesheet=xslt/semaphore.xsl"
                    width="100%" height="100%"
                    scrolling="auto" frameborder="0"></iframe>

如果我没有通过&stylesheet=xslt/semaphore.xsl部分，我得到的结果显然不是样式，这就是为什么我认为它与我的xsl有关，有趣的是，我使用tomcat 6运行相同的应用程序，这是使用tomcat 8。 我使用的tomcat版本有问题吗？ 我也在使用Xalan 2.7 有什么想法吗