slf4j使用

1.添加依赖

        以slf4j+log4j为例

<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-log4j12</artifactId>
	<version>1.7.12</version>
</dependency>

2.添加log4j配置文件

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.TTCCLayout 

log4j.appender.fileLog=org.apache.log4j.FileAppender
log4j.appender.fileLog.File=c:/Log4JDemo.log
log4j.appender.fileLog.layout=org.apache.log4j.TTCCLayout  

log4j.rootLogger=DEBUG, console ,fileLog

3.代码中使用

public class MyDao {

	private static Logger logger = LoggerFactory.getLogger(MyDao.class);
	
	public static void main(String[] args) 
	{
		logger.debug("this is {}", new Date());
	}
}