log4j方法的使用

log4j.properties配置

log4j.logger.webAplLogger=info, logFile
log4j.appender.logFile=org.apache.log4j.FileAppender
log4j.appender.logFile.Threshold=warn
log4j.appender.logFile.Append=true
log4j.appender.logFile.File=D:/logs/log.log4j 
log4j.appender.logFile.layout=org.apache.log4j.PatternLayout
log4j.appender.logFile.layout.ConversionPattern=[%-5p] %d(%r) --> [%t] %l: %m %x %n 

方法的使用：

public static void main(String[] args) {
     Logger fileLog = Logger.getLogger("webAplLogger");
     fileLog.info("info");
     fileLog.warn("warn");
 }