Question

我有以下正则表达式，我获得Regular expression to parse a log file and find stacktraces

^.+Exception[^\n]++(\s+at .++)+

找到堆栈跟踪非常有用。但是，我需要找到通过记录器输出的堆栈跟踪（特别是在Bukkit Minecraft服务器中）。它们看起来像这样：

2012-08-10 08:19:17 [SEVERE] java.lang.NullPointerException
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.World.tickEntities(World.java:1146)
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:567)
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:476)
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
2012-08-10 08:19:17 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)

日期和时间将始终改变，但[SEVERE]将始终存在。我希望用正则表达式捕获该异常格式。任何异常，而不仅仅是NPE。

我真的不确定该怎么做。我查看了一些关于正则表达式的教程，但这些大文章对我来说都是胡言乱语。这是我最近的尝试

^.+Exception[^\n]++(.++at .++)+

编辑：好的，我做了更多的研究，并进一步了解。我做的： \d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\s\[SEVERE\] 哪个匹配第一部分。虽然我在捕捉整个痕迹时遇到了一些麻烦。

Answer 1

我做到了！

^.+Exception[^\n]++(\s\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} \[SEVERE\] at .++)+

编译时只需打开DOTALL即可。

Answer 2

这非常适合您使用Logger的方法。默认情况下，堆栈跟踪打印出来，堆栈跟踪的每一行都有选项卡。我的示例将起始行与日期和原始错误消息以及异常错误和堆栈跟踪（如果它们在那里）匹配。

((?:[a-zA-Z]{3} \d{1,2}, \d{4,4} \d{1,2}:\d{2}:\d{2} (AM|PM) (\(INFO\)|\(SEVERE\)|\(WARNING\))).*\r(?:(.*Exception.*(\r.*)(\tat.*\r)+)))|((?:[a-zA-Z]{3} \d{1,2}, \d{4,4} \d{1,2}:\d{2}:\d{2} (AM|PM) (\(INFO\)|\(SEVERE\)|\(WARNING\))).*)

符合以下任何条件：

Feb 08, 2014 5:18:00 PM (SEVERE) Thread: 13 [com.datarefresh.refresh.RefreshActionQueuePersister.write] Could not write RefreshActionQueue checkpoint due to error
Feb 09, 2014 1:00:10 AM (INFO) Thread: 14 [com.datarefresh.refresh.RefreshWorker.doPostProcess] (DATA_INSIGHT_DATA_REFRESH.15) Post-processing...
Feb 09, 2014 1:00:20 AM (SEVERE) Thread: 14 [com.datarefresh.refresh.RefreshActionQueuePersister.write] Could not write RefreshActionQueue checkpoint due to error
java.lang.RuntimeException: Could not delete RefreshActionQueue checkpoint file
    at com.datarefresh.refresh.RefreshActionQueuePersister.delete(RefreshActionQueuePersister.java:71)
    at com.datarefresh.refresh.RefreshActionQueuePersister.write(RefreshActionQueuePersister.java:53)
    at com.refresh.RefreshActionQueue.persist(RefreshActionQueue.java:94)
    at com.refresh.RefreshActionQueue.removeCurrentAction(RefreshActionQueue.java:48)
    at com.refresh.RefreshWorker.doPostProcess(RefreshWorker.java:304)
    at com.refresh.RefreshWorker.doActions(RefreshWorker.java:82)
    at com.refresh.RefreshWorker.call(RefreshWorker.java:57)
    at com.datarefresh.refresh.RefreshWorker.call(RefreshWorker.java:28)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Feb 09, 2014 1:00:20 AM (INFO) Thread: 14 [com.datarefresh.refresh.RefreshWorker.doPostProcess] (DATA_INSIGHT_DATA_REFRESH.16) Done post-processing.

实际上我会从匹配中删除INFO。

Java正则表达式，用于匹配记录器中的异常堆栈跟踪

2 个答案: