log4j.properties 备忘

单一文件输出

log4j.rootCategory=DEBUG,stdout,A1

log4j.appender.stdout=org.apache.log4j.DailyRollingFileAppender
log4j.appender.stdout.File=...

log4j.appender.stdout.DatePattern=‘_‘yyyy-MM-dd‘.txt‘
log4j.appender.stdout.layout=org.apache.log4j.TTCCLayout

log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss SSS} %5p %t %c{1}:%L - %m%n

区分不同级别生成不同文件

### \u8BBE\u7F6E###
log4j.rootLogger = DEBUG,stdout,D,E

### \u8F93\u51FA\u4FE1\u606F\u5230\u63A7\u5236\u62AC ###
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  %m%n

### \u8F93\u51FADEBUG \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=E://logs/error.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ...DEBUG_log
log4j.appender.D.DatePattern=‘_‘yyyy-MM-dd‘.txt‘
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

### \u8F93\u51FAERROR \u7EA7\u522B\u4EE5\u4E0A\u7684\u65E5\u5FD7\u5230=E://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = ...ERROR_log
log4j.appender.E.DatePattern=‘_‘yyyy-MM-dd‘.txt‘
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

log4j.properties 备忘

原文：https://www.cnblogs.com/kldywx/p/11589317.html