学习链接：

 

log4j文件：

log4j.rootLogger=info,C,Rlog4j.appender.C=org.apache.log4j.ConsoleAppenderlog4j.appender.C.Target=System.outlog4j.appender.C.layout=org.apache.log4j.PatternLayoutlog4j.appender.C.layout.ConversionPattern=%-d %5p [%C.java:%L] - %m%nlog4j.appender.R=org.apache.log4j.RollingFileAppenderlog4j.appender.R.File=D://logs/nisweb.loglog4j.appender.R.MaxFileSize=5MB log4j.appender.R.MaxBackupIndex=2log4j.appender.R.layout=org.apache.log4j.PatternLayoutlog4j.appender.R.layout.ConversionPattern=%-d %5p [%C.java:%L] - %m%n

 

测试：

package com.mucfc;import org.apache.log4j.Logger;public class Test {    private static Logger logger = Logger.getLogger(Test.class);    public void logFunction(){        logger.info("111122");    }            public static void main(String[] args) {    //    PropertyConfigurator.configure(ClassLoader.getSystemResource("log4j.properties"));        System.out.println(ClassLoader.getSystemResource("log4j.properties"));//        Logger logger = Logger.getLogger(Test.class);        logger.info("message info");        logger.error("message error");    }}

结果：

 

log4j.properties地址： file:/D:/work/workspace/LogLearning/build/classes/log4j.properties2016-03-08 15:01:32,769  INFO [com.mucfc.Test.java:17] - message info2016-03-08 15:01:32,771 ERROR [com.mucfc.Test.java:18] - message error