log4j对齐

Question

通过检查IntelliJ IDEA的日志输出,我注意到对齐非常好(由于类名称正确对齐和修剪的事实).

你是如何使用log4J做到这一点的？你需要一个特殊的appender吗？

2011-01-08 00:48:53,938 [   2537]   INFO - ellij.vfs.persistent.FSRecords - Marking VFS as corrupted 
2011-01-08 00:48:53,987 [   2586]   INFO - api.vfs.impl.local.FileWatcher - Native file watcher is operational. 
2011-01-08 00:48:54,034 [   2633]   INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/other.xml file is null 
2011-01-08 00:48:54,035 [   2634]   INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/other.xml 
2011-01-08 00:48:54,046 [   2645]   INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/project.default.xml file is null 
2011-01-08 00:48:54,047 [   2646]   INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/project.default.xml 
2011-01-08 00:48:54,051 [   2650]   INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/options.xml file is null 
2011-01-08 00:48:54,051 [   2650]   INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/options.xml 
2011-01-08 00:48:54,295 [   2894]   INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/filetypes.xml file is null 
2011-01-08 00:48:54,295 [   2894]   INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/filetypes.xml 
2011-01-08 00:48:54,342 [   2941]   INFO - .history.utils.LocalHistoryLog - local history version mismatch (was: 0, expected: 5), rebuilding... 
2011-01-08 00:48:54,342 [   2941]   INFO - .history.utils.LocalHistoryLog - FS has been rebuild, rebuilding local history... 

Answer 1

你可以用PatternLayout做到这一点.例如,您可以将记录器类别定义为:

%20.20c

这将导致字段总是正好20个字符宽,如果值小于20个字符,则使用空格填充左边,如果大于20,则截断它.

您问题中日志的PatternLayout可能类似于:

%d [%7.7r] %6.6p - %c{30} - %m%n