使用 Log4j 的多个文件
我正在使用 log4j 来记录一些信息。我想将这些信息分成多个文件。
我的配置文件与此类似：
#logger_1
log4j.logger.logger_1=debug, logger_1_File
log4j.appender.logger_1_File=org.apache.log4j.RollingFileAppender
log4j.appender.logger_1_File.layout=org.apache.log4j.PatternLayout
log4j.appender.logger_1_File.layout.ConversionPattern=%d{ABSOLUTE} %m%n
log4j.appender.logger_1_File.File=${webinf}/logs/logger1/logger1.log
log4j.appender.logger_1_File.MaxFileSize=5000KB
log4j.appender.logger_1_File.MaxBackupIndex=200
log4j.appender.logger_1_File.encoding=UTF-8
#logger_2
log4j.logger.logger_2=debug, logger_2_File
log4j.appender.logger_2_File=org.apache.log4j.RollingFileAppender
log4j.appender.logger_2_File.layout=org.apache.log4j.PatternLayout
log4j.appender.logger_2_File.layout.ConversionPattern=%d{ABSOLUTE} %m%n
log4j.appender.logger_2_File.File=${webinf}/logs/logger2/logger2.log
log4j.appender.logger_2_File.MaxFileSize=5000KB
log4j.appender.logger_2_File.MaxBackupIndex=200
log4j.appender.logger_2_File.encoding=UTF-8
...
我有两个问题：
- 有什么办法可以缩写 这（省略重复/样板 代码）？我必须重复很多 当我使用多个附加器时行。
- 是 有任何性能问题 它？此配置意味着 log4j 保留 几个要写入的资源 文件。是吗 导致性能问题？我 有 9 个像这样的附加程序，所以我 担心它。
I'm using log4j to log several informations. I'd like to separate these infos into multiple files.
My configuration file is similar to this:
#logger_1
log4j.logger.logger_1=debug, logger_1_File
log4j.appender.logger_1_File=org.apache.log4j.RollingFileAppender
log4j.appender.logger_1_File.layout=org.apache.log4j.PatternLayout
log4j.appender.logger_1_File.layout.ConversionPattern=%d{ABSOLUTE} %m%n
log4j.appender.logger_1_File.File=${webinf}/logs/logger1/logger1.log
log4j.appender.logger_1_File.MaxFileSize=5000KB
log4j.appender.logger_1_File.MaxBackupIndex=200
log4j.appender.logger_1_File.encoding=UTF-8
#logger_2
log4j.logger.logger_2=debug, logger_2_File
log4j.appender.logger_2_File=org.apache.log4j.RollingFileAppender
log4j.appender.logger_2_File.layout=org.apache.log4j.PatternLayout
log4j.appender.logger_2_File.layout.ConversionPattern=%d{ABSOLUTE} %m%n
log4j.appender.logger_2_File.File=${webinf}/logs/logger2/logger2.log
log4j.appender.logger_2_File.MaxFileSize=5000KB
log4j.appender.logger_2_File.MaxBackupIndex=200
log4j.appender.logger_2_File.encoding=UTF-8
...
I have two questions about it:
- Is there any way I could abbreviate
this (omit the repeated/boilerplate
code)? I have to repeat a lot of
line when I use several appenders. - Is
there any performance problem with
it? This config means log4j holds
several resources to write into
files. Does it
cause performance problems? I
have 9 appenders like these so I'm
worried about it.
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首先，使用单个附加程序、多个附加程序和不同的日志级别来测量应用程序的性能。 如果您遇到性能问题，则需要解决它，否则无需担心。
另请阅读log4j 简介末尾的“性能”部分。
First of all, measure the performance of your app with a single appender, with many appenders, with different log levels. If you have a performance issue, you need to solve it, otherwise no need to worry about it.
Also read the "Performance" section at the end of the Short introduction to log4j.