log4j 配置文件示例

下面是代码示例

package tutorial;

import org.apache.log4j.Logger;

public class Foo {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		Logger logger = Logger.getLogger("tutorial");
		Logger barlogger = Logger.getLogger(Foo.class.getName());
		
		logger.info("定义在了信息级别");
		logger.warn("Low fuel level.");
		logger.debug("Starting search for nearest gas station.");
		logger.error("出现错误啦");

		barlogger.info("Located nearest gas station.");
		barlogger.debug("Exiting gas station search");
		barlogger.error("又出现错误啦");
	}

}

 下面是配置文件

# from low to heigh is : TRACE,DEBUG,INFO,WARN,ERROR and FATAL

# basic
log4j.rootLogger=INFO, stdout, R, info, error
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


# RollingFileAppender   一个简单的有大小控制的文件记录
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log
log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d %p [%c] - %m%n

# DailyRollingFileAppender info   按日期命名的文件记录  并指记录阀值以上级别日志
log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout
log4j.appender.info.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.info.datePattern='_'yyyy-MM-dd'.log'
log4j.appender.info.Threshold=INFO 
log4j.appender.info.append=true
log4j.appender.info.File=infoLog

# DailyRollingFileAppender error  按日期命名的文件记录  并指记录阀值以上级别日志
log4j.logger.error=error
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout
log4j.appender.error.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.error.datePattern='_'yyyy-MM-dd'.log'
log4j.appender.error.Threshold=ERROR 
log4j.appender.error.append=true
log4j.appender.error.File=errorLog