Java tutorial
/* * Copyright 1999-2004 Alibaba.com All right reserved. This software is the confidential and proprietary information of * Alibaba.com ("Confidential Information"). You shall not disclose such Confidential Information and shall use it only * in accordance with the terms of the license agreement you entered into with Alibaba.com. */ package com.alibaba.stonelab.javalab.misc; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.log4j.MDC; /** * @author <a href="mailto:li.jinl@alibaba-inc.com">Stone.J</a> Nov 15, 2011 */ public class Misc2 { public static void main(String[] args) throws Exception { Log LOG = LogFactory.getLog(Misc2.class); MDC.put("ip", "127.0.0.1"); MDC.put("user", "stone2083"); LOG.error("OK"); MDC.remove("ip"); MDC.remove("user"); } }