log4j.properties典型配置

# Configure logging for testing: optionally with log filelog4j.rootLogger=WARN, stdout# log4j.rootLogger=WARN, stdout, logfilelog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%nlog4j.appender.logfile=org.apache.log4j.FileAppenderlog4j.appender.logfile.File=target/spring.loglog4j.appender.logfile.layout=org.apache.log4j.PatternLayoutlog4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n

在MyEclipse中启动tomcat时,在控制台经常看到如下信息:
log4j:WARN No appenders could be found for logger
log4j:WARN Please initialize the log4j system properly.

通过配置log4j.properties可以解决