Java 如何跟踪引发异常的文件？

我在tomcat的日志窗口中遇到异常，但我不确定错误在哪个文件中，这是日志输出

Oct 19, 2012 11:09:36 AM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
Oct 19, 2012 11:09:36 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
Oct 19, 2012 11:09:36 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'dispatcher'
Oct 19, 2012 11:09:37 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'MACT'
Oct 19, 2012 11:09:42 AM org.apache.catalina.core.ApplicationContext log
INFO: Destroying Spring FrameworkServlet 'MACT'
Oct 19, 2012 11:09:43 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'MACT'
Oct 19, 2012 11:09:46 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [MACT] in context with path [/MACT] threw exception
java.lang.NumberFormatException: For input string: "Thu Oct 18 13"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    at java.lang.Long.parseLong(Long.java:441)
    at java.lang.Long.parseLong(Long.java:483)
    at com.testcomp.mact.web.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:70)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
    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:722)

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如果您认为错误与您的编码有关，那么在名称空间中查找该类

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在这种情况下，

com.testcomp.mact.web.filter.AuthorizationFilter.doFilter（AuthorizationFilter.java:70）

对我来说并不是任何已知的框架，所以我假设它是由您控制的代码。

com.testcomp.mact.web.filter.AuthorizationFilter.doFilter（AuthorizationFilter.java:70）--这里是方法doFilter（…）第70行。。您正在尝试将字符串Thu-Oct 18-13转换为Long。这就是错误所在

您正在尝试将中包含日期值的字符串转换为长值。请修改第70行的

AuthorizationFilter.doFilter

，以确保您正在传递有效的输入

parseLong

调用。如果您对输入值没有任何控制，您可以尝试以下方法

 try {
         long l = Long.parseLong(s);
         System.out.println("long l = " + l);
      } catch (NumberFormatException e) {
         log.error("NumberFormatException: " + nfe.getMessage()); 
          //Redirect your request to error page saying invalid input

      }

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我在第70行后面的几行中添加了一个断点，但代码并没有停在那个里。为什么它会对未运行的代码抛出异常？