## **slf4j 說明**
簡單日志門面，對應的英文為Simple Logging Facade，是存取日志的標準接口，包括slf4j、log4j、jdk logging api和apache common-log等具體實現。
[SLF4J](https://www.slf4j.org/)
## **入門**
maven
~~~
<!--slf4j 日志門面 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.32</version>
</dependency>
<!--slf4j 簡單實現 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.21</version>
</dependency>
~~~
代碼
~~~
package cn.maicaii;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class App {
protected static Logger logger =LoggerFactory.getLogger(App.class);
@Test
public void main() {
logger.info("admmin");
}
}
~~~
實現原理
