** 定义子logger其目的就是能够在某一范围内(某一个class或者某一个package)下面,日志的输出方式与其他地方的日志输出方式不同。**
log4j.properties
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<strong><span style="font-size:14px;">log4j.rootLogger = DEBUG,stdout,D
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log4j.debug=ture //是否打开log4j的内部日志打印
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(ConsoleAppender:控制台打印)
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
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(DailyRollingFileAppender)
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = G://logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
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(mail)
log4j.appender.mail=org.apache.log4j.net.SMTPAppender
log4j.appender.mail.Threshold=DEBUG
log4j.appender.mail.BufferSize=10
log4j.appender.mail.From = 123@qq.com
log4j.appender.mail.SMTPHost=smtp.qq.com
log4j.appender.mail.Subject=Log4J Message
log4j.appender.mail.SMTPUsername=123
log4j.appender.mail.SMTPPassword=xxx
log4j.appender.mail.layout=org.apache.log4j.PatternLayout
log4j.appender.mail.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n
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配置子logger,目的就是控制一定范围内的日志输出,比如这里的子logger是控制cn.server.test包下面的所有类的日志输出,其父logger就是rootLogger
log4j.logger.cn.server.test=error,E
log4j.additivity.cn.server.test=false //
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =G://logs/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
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log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
**配置子logger,目的就是控制一定范围内的日志输出,比如这里的子logger是控制cn.server.test包下面的所有类的日志输出,其父logger就是rootLogger。**
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- log4j.logger.cn.server.test=error,E
** 在cn.server.test包里面中使用**
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- Logger logger = Logger.getLogger(xxx.class)
得到logger对象,然后使用logger对象进行日志输入的时候,logger会根据xxx.class的全类名找到这里声明的子Logger
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- log4j.logger.cn.server.test=error,E
在cn.server.test包外的类,也可以使用
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- Logger logger = Logger.getLogger("cn.server.test");
特别指定使用该子logger进行日志输出。
log4j的additivity属性: 表示子logger是否要在父logger的appender中输出日志,若是additivity设为false,则子Logger只会在自己的appender里输出,而不会在父Logger的appender里输出。