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  • log4j配置及异常、解决办法

    配置:

    ### set log levels ### D只有一个E也只有一个
    log4j.rootLogger = debug,stdout,D,E
    
    ### 输出到控制台 ###
    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 =  %d{ABSOLUTE} %5p %c{1}:%L - %m%n
    ### 输出到日志文件 ###
    log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.D.File = 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
    #
    #### 保存Debug信息到单独文件 ### ## 只输出ERROR级别以上的日志!!!
    #log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
    #log4j.appender.D.File = logs/error.log
    #log4j.appender.D.Append = true
    #log4j.appender.D.Threshold = ERROR
    #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
    #
    #
    #### 保存异常信息到单独文件 ###
    log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
    log4j.appender.E.File = logs/error.log
    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

    异常1:log4j:ERROR Category option " 1 " not a decimal integer.

               java.lang.NumberFormatException: For input string: " 1 "

         解决办法:    log4j.properties 的配置文件中:

                    log4j.appender.stdout.layout.ConversionPattern =  %d{ABSOLUTE} %5p %c{ 1 }:%L - %m%n

                    把{1}中的空格去掉。

     

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  • 原文地址:https://www.cnblogs.com/Demonfeatuing/p/9528906.html
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