第三方包路径

D:\jp\log4j\log4j-1.2.16.jar

代码D:\jp\log4j\Log4jDemo.java

import org.apache.log4j.*;public class Log4jDemo{	//参数与所在类名一致	private static Logger logger = Logger.getLogger(Log4jDemo.class);		public static void main(String[] args) {		//初始化，使用默认配置		BasicConfigurator.configure();		logger.debug("This is a test log.");	}	}

编译

javac -classpath ".\*" Log4jDemo.java

执行

java -classpath ".;.\*" Log4jDemo

输出

0 [main] DEBUG Log4jDemo  - This is a test log.