log4j配置文件(xml版)

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< log4j:configuration xmlns:log4j ='http://jakarta.apache.org/log4j/'>

< layout class ="org.apache.log4j.PatternLayout" >

< param name ="ConversionPattern"

value ="[%-5p]%d{yyyy-MM-dd HH:mm:ss}[%l]: %m%n" />

< appender name ="DEBUG"

class ="org.apache.log4j.DailyRollingFileAppender" >

< param name ="File"

value ="${catalina.home}/bin/config/log/debug/cs-debug.log" />

< param name ="Append" value ="true" />

< param name ="DatePattern" value =".yyyy-MM-dd" />

< layout class ="org.apache.log4j.PatternLayout" >

< param name ="ConversionPattern"

value ="[%-5p]%d{yyyy-MM-dd HH:mm:ss}[%C(%M:%L)]: %m%n" />

< filter class ="org.apache.log4j.varia.LevelRangeFilter" >

< param name ="LevelMin" value ="DEBUG" />

< param name ="LevelMax" value ="DEBUG" />

< appender name ="INFO"

class ="org.apache.log4j.DailyRollingFileAppender" >

< param name ="File"

value ="${catalina.home}/bin/config/log/info/cs-info.log" />

< param name ="Append" value ="true" />

< param name ="DatePattern" value =".yyyy-MM-dd" />

< layout class ="org.apache.log4j.PatternLayout" >

< param name ="ConversionPattern"

value ="[%-5p]%d{yyyy-MM-dd HH:mm:ss}[%C(%M:%L)]: %m%n" />

< filter class ="org.apache.log4j.varia.LevelRangeFilter" >

< param name ="LevelMin" value ="INFO" />

< param name ="LevelMax" value ="INFO" />

< appender name ="WARN"

class ="org.apache.log4j.DailyRollingFileAppender" >

< param name ="File"

value ="${catalina.home}/bin/config/log/warn/cs-warn.log" />

< param name ="Append" value ="true" />

< param name ="DatePattern" value =".yyyy-MM-dd" />

< layout class ="org.apache.log4j.PatternLayout" >

< param name ="ConversionPattern"

value ="[%-5p]%d{yyyy-MM-dd HH:mm:ss}[%C(%M:%L)]: %m%n" />

< filter class ="org.apache.log4j.varia.LevelRangeFilter" >

< param name ="LevelMin" value ="WARN" />

< param name ="LevelMax" value ="WARN" />

< appender name ="ERROR"

class ="org.apache.log4j.DailyRollingFileAppender" >

< param name ="File"

value ="${catalina.home}/bin/config/log/error/cs-error.log" />

< param name ="Append" value ="true" />

< param name ="DatePattern" value =".yyyy-MM-dd" />

< layout class ="org.apache.log4j.PatternLayout" >

< param name ="ConversionPattern"

value ="[%-5p]%d{yyyy-MM-dd HH:mm:ss}[%C(%M:%L)]: %m%n" />

< filter class ="org.apache.log4j.varia.LevelRangeFilter" >

< param name ="LevelMin" value ="ERROR" />

< param name ="LevelMax" value ="ERROR" />

< root >

< priority value ="debug" />

< appender-ref ref ="STDOUT" />

< appender-ref ref ="DEBUG" />

< appender-ref ref ="INFO" />

< appender-ref ref ="WARN" />

< appender-ref ref ="ERROR" />

保存为log4j.xml，并放置在src目录下(eclipse会自动编译到classes目录)
在tomcat的bin目录创建config\log目录，并在log目录下分别创建debug、info、warn、error目录
不同级别的日志会分别输出到各自对应的日志文件中
OK~

PS: value="${catalina.home}/bin/config/log/debug/cs-debug.log" />中的value我想替换成value="${log.dir}/debug/cs-debug.log",也就是说让log.dir="${catalina.home}/bin/config/log"。
log4j.properties文件中可以这样设置
log_dir=${catalina.home}/bin/config/log

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