log4j:WARN No appenders could be found for logger
2016-09-27 00:00
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在使用Log4j时若提示如下信息:
log4j:WARN No appenders could be found for logger
则,解决办法为:在项目的src下面新建file名为log4j.properties文件,内容如下:
# Configure logging for testing: optionally with log file
#可以设置级别:debug>info>error
#debug:可以显式debug,info,error
#info:可以显式info,error
#error:可以显式error
log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#log4j.rootLogger=error,appender1
#输出到控制台
log4j.appender.appender1=org.apache.log4j.ConsoleAppender
#样式为TTCCLayout
log4j.appender.appender1.layout=org.apache.log4j.TTCCLayout
然后,存盘退出。再次运行程序就会显示Log信息了。
通过配置文件可知,我们需要配置3个方面的内容:
1、根目录(级别和目的地);
2、目的地(控制台、文件等等);
3、输出样式。
或者,使用下面的内容也可以:
# Configure logging for testing: optionally with log file
log4j.rootLogger=WARN, stdout
# log4j.rootLogger=WARN, stdout, logfile
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n
log4j:WARN No appenders could be found for logger
则,解决办法为:在项目的src下面新建file名为log4j.properties文件,内容如下:
# Configure logging for testing: optionally with log file
#可以设置级别:debug>info>error
#debug:可以显式debug,info,error
#info:可以显式info,error
#error:可以显式error
log4j.rootLogger=debug,appender1
#log4j.rootLogger=info,appender1
#log4j.rootLogger=error,appender1
#输出到控制台
log4j.appender.appender1=org.apache.log4j.ConsoleAppender
#样式为TTCCLayout
log4j.appender.appender1.layout=org.apache.log4j.TTCCLayout
然后,存盘退出。再次运行程序就会显示Log信息了。
通过配置文件可知,我们需要配置3个方面的内容:
1、根目录(级别和目的地);
2、目的地(控制台、文件等等);
3、输出样式。
或者,使用下面的内容也可以:
# Configure logging for testing: optionally with log file
log4j.rootLogger=WARN, stdout
# log4j.rootLogger=WARN, stdout, logfile
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n
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