Log4J + commons-logging 配置

    commons-logging 是对 log4j 的再次封装，日志功能与依赖进行解耦。

    配置文件丢到classpath下面即可，不要忘记引入两个jar包 log4j-1.2.16.jar commons-logging-1.1.1.jar

commons-logging.properties

#LogFactory implement
org.apache.commons.logging.LogFactory=org.apache.commons.logging.impl.LogFactoryImpl
# SimpleLog
#org.apache.commons.logging.Log = org.apache.commons.logging.impl.SimpleLog
# JDK 1.4 logger
#org.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger
# Avalon Toolkit
#org.apache.commons.logging.Log=org.apache.commons.logging.impl.LogKitLogger
#Log4j
org.apache.commons.logging.Log=org.apache.commons.logging.impl.Log4JLogger
           

log4j.properties

### set log levels ###
log4j.rootLogger = debug,  stdout,  D,  E

### output to control ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =  %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### output to log file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### error to log file ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender

log4j.appender.E.File = logs/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n 
           

Java Code

public class Test {

	private static Log log = LogFactory.getLog(Test.class);  
	
	public static void main(String[] args) {
		log.debug("debug");
		log.info("info");
		log.error("error");
	}

}