Log4j的简单使用

package com.chase.test;

import org.apache.log4j.Logger;

public class Log4jTest {

    /**
     * Log4j
     */
    protected final Logger logger = Logger.getLogger(getClass());
    
    public <T> void testLog(T t) {
        logger.info(t);
    }
    
    public void end() {
        logger.info("程序结束！！！");
        System.out.println("end+++++");
    }
    
    public static void main(String[] args) {
        Log4jTest log4jTest = new Log4jTest();
        log4jTest.testLog("程序启动");
        log4jTest.testLog(12580);
        log4jTest.testLog(12580l);
        log4jTest.end();
    }

}

输出：

2013-10-14 17:44:40,921 INFO [com.chase.test.Log4jTest] - <程序启动>
2013-10-14 17:44:40,921 INFO [com.chase.test.Log4jTest] - <12580>
2013-10-14 17:44:40,921 INFO [com.chase.test.Log4jTest] - <12580>
2013-10-14 17:44:40,921 INFO [com.chase.test.Log4jTest] - <程序结束！！！>
end+++++

log4j.properties配置：

# For JBoss: Avoid to setup Log4J outside $JBOSS_HOME/server/default/deploy/log4j.xml!
# For all other servers: Comment out the Log4J listener in web.xml to activate Log4J.
log4j.rootLogger=info, 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.RollingFileAppender
###日志存放位置，默认为程序根目录，具体到某个盘符
log4j.appender.logfile.File=/logs/chase.log
log4j.appender.logfile.MaxFileSize=512KB
# Keep three backup files.
log4j.appender.logfile.MaxBackupIndex=3
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n

记得导入：log4j.jar包