log4j中logger标签中additivity属性的用法说明
目录
- log4j logger标签中additivity属性
- log4j.additivity用法和例子
log4j logger标签中additivity属性
将logger中的 additivity 属性配置为 false,则这个logger不会将日志流反馈到root中。
可以达到以logger中配置的appender方式来输出日志而其他地方输出的目的,看配置:
< appender name = "DEMO" class = "com.XXXXX.RollingFileAppender" > < param name = "file" value = "${loggingRoot}/xxx.log" /> < param name = "append" value = "true" /> < param name = "encoding" value = "GB2312" /> < param name = "threshold" value = "info" /> < param name = "MaxFileSize" value = "50MB" /> < param name = "MaxBackupIndex" value = "10" /> < layout class = "org.apache.log4j.PatternLayout" > < param name = "ConversionPattern" value = "%d [%X{requestURIWithQueryString}] %-5p %c{2} - %m%n" /> </ layout > </ appender > < logger name = "XXXX.XXXX.XXXX" additivity = "false" > < level value = "${loggingLevel}" /> < appender-ref ref = "DEMO" /> </ logger >
root的作用是收集下面所有反馈上来的信息流并根据配置在root中appender进行输出,只要你在looger中配置了additivity="false",就不会反馈到root中。
意味着不会重复输出!
log4j.additivity用法和例子
因为需要将packageOne和packageTwo的日志写入各自单独的文件,同时在总的日志中不出现packageOne和PackageTwo的日志。
可以使用log4j.additivity。因为log4j是层次的,如果没有log4j.additivity默认写入到packageOneFileAppender和packageTwoFileAppender的都会写入rootLogger的rootFileAppender
log4j.logger.com.demo.packageOone = INFO, packageOneFileAppender log4j.additivity.com.demo.
packageOne
= false log4j.category.com.demo.packageTwo = INFO, packageTwoFileAppender log4j.additivity.com.demo.packageTwo = false log4j.rootLogger = INFO, rootFileAppender
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。
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