Ceki Gülcü在Java日志领域世界知名。他创造了Log4J,这个最早的Java日志框架即便在JRE内置日志功能的竞争下仍然非常流行。随后他又着手实现SLF4J这个"简单的日志前端接口(Facade)"来替代Jakarta Commons-Logging。

要在工程里面使用logback需要以下jar文件:

maven依赖

<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.7</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-access</artifactId>
<version>1.1.7</version>
</dependency>

不需要再写logback-core和slf4j的依赖,因为logback-classic依赖这两个jar包。

注:

logback.xml(放在src/main/resource底下),不然找不到,即放在classpath最外层

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aaarticlea/png;base64,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" alt="" />这样就可以了,要在classpath最外层
1.logback首先会试着查找logback.groovy文件;
2.当没有找到时,继续试着查找logback-test.xml文件;
3.当没有找到时,继续试着查找logback.xml文件;
4.如果仍然没有找到,则使用默认配置(打印到控制台)。
创建LogbackDemo.java用于测试,代码如

public class LogbackDemo {
private static Logger logger = LoggerFactory.getLogger(LogbackDemo.class); public static void main(String[] args) {
/**
* 生产环境只能打印info,warn,error级别的日志,
* 不能打印trace,debug级别的日志
*/
logger.trace("<--trace-->");
logger.debug("<--debug-->");
logger.info("<--info-->");
logger.warn("<--warn-->");
logger.error("<--error-->"); String name = "winner_0715";
//打印变量,注意,{}绝不能省
logger.info("Hello,{}!", name); String message = "logback";
//禁止用String的"+"来输出字符串
//所以这一种不推荐
logger.info("Hello," + name + ",欢迎使用" + message);
//推荐使用的方式
logger.info("Hello,{},欢迎使用{}", name, message); String[] fruits = {"apple", "banana"};
// 可以传入一个数组,结果为"Fruit: apple,banana"
logger.info("Fruit:{},{}", fruits); }
}

执行结果:

16:51:29.336 [main] DEBUG com.winner.log.LogbackDemo - <--debug-->
16:51:29.339 [main] INFO com.winner.log.LogbackDemo - <--info-->
16:51:29.339 [main] WARN com.winner.log.LogbackDemo - <--warn-->
16:51:29.339 [main] ERROR com.winner.log.LogbackDemo - <--error-->
16:51:29.339 [main] INFO com.winner.log.LogbackDemo - Hello,winner_0715!
16:51:29.340 [main] INFO com.winner.log.LogbackDemo - Hello,winner_0715,欢迎使用logback
16:51:29.340 [main] INFO com.winner.log.LogbackDemo - Hello,winner_0715,欢迎使用logback
16:51:29.340 [main] INFO com.winner.log.LogbackDemo - Fruit:apple,banana

由此可见,日志是遵守一定格式的,但是我们并没有写配置文件,所以使用的是默认配置。

默认格式:时间(精确到毫秒)+ 线程名称 + log级别 + 类名 + log信息

从代码里可能只看得出来使用了slf4j,其实是使用了logback的jar包的

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" alt="" />

仅仅使用slf4j的jar包无法完成日志功能。

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