Logback浅析

简单的将，slf4j是一个日志的框架，有各种日志的接口，但是并不包含实际的写日志的方法。

log4j,logback则各自独立的实现了日志的写入。

1.使用log4j独立生成日志

项目中导入log4j.jar，log4j.properties或log4j.xml

package com.spike.test;

import java.io.IOException;
import java.sql.SQLException;

import org.apache.log4j.Logger;

public class Log4jExample {
       static Logger log = Logger.getLogger(Log4jExample.class.getName());
       
       public static void main(String[] args)throws IOException,SQLException{
          log.debug("Debug");
          log.info("Info");
          log.error("error");
          System.out.println(Log4jExample.class.getName()+" test");
       }
}

输出结果如下，日志写入到log4j配置文件指定的文件中

[03 14:04:02,721 DEBUG] [main] test.Log4jExample - Debug
[03 14:04:02,723 INFO ] [main] test.Log4jExample - Info
[03 14:04:02,723 ERROR] [main] test.Log4jExample - error
com.spike.test.Log4jExample test

2.slf4j + log4j

项目中包含slf4j-api.jar,log4j.jar,slf4j-log4j.jar,以及log4j日志的配置文件

package com.spike.test;
import java.io.IOException;
import java.sql.SQLException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class Slf4jExample {

    /* Get actual class name to be printed on */
       static Logger log = LoggerFactory.getLogger(Slf4jExample.class.getName());       
       
       public static void main(String[] args)throws IOException,SQLException{
          log.debug("Debug");
          log.info("Info");
          log.error("error");
          System.out.println(Slf4jExample.class.getName()+" test");
       }
}

输出结果如下，日志写入到log4j配置文件指定的文件

[03 14:07:50,548 DEBUG] [main] test.Slf4jExample - Debug
[03 14:07:50,549 INFO ] [main] test.Slf4jExample - Info
[03 14:07:50,549 ERROR] [main] test.Slf4jExample - error
com.spike.test.Slf4jExample test

3.slf4j + logback

项目中导入slf4j-api.jar，logback-access.jar，logback-classic.jar，logback-core-1.1.7.jar，以及logback.xml配置文件

package com.spike.test;


import java.io.IOException;
import java.sql.SQLException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class LogbackExample {

       
       static Logger log = LoggerFactory.getLogger(Log4jExample.class.getName());
   
       
       public static void main(String[] args)throws IOException,SQLException{
           
          log.debug("Debug");
          log.info("Info");
          log.error("error");
          System.out.println(Log4jExample.class.getName()+" test");
       }

}

输出结果如下，日志写入到logback.xml指定的文件中

2016-11-03 14:14:31,799 [DEBUG] [main] com.spike.test.Log4jExample [LogbackExample.java : 18] Debug
2016-11-03 14:14:31,803 [INFO] [main] com.spike.test.Log4jExample [LogbackExample.java : 19] Info
2016-11-03 14:14:31,803 [ERROR] [main] com.spike.test.Log4jExample [LogbackExample.java : 20] error
com.spike.test.Log4jExample test

参考

用slf4j+logback实现多功能日志解决方案 --- 转

LogBack入门实践

Logback 学习笔记

slf4j log4j logback关系详解和相关用法

SLF4J LOG4J-12下载地址

slf4j、jcl、jul、log4j1、log4j2、logback大总结