声明:如果不想每次都写private final Logger logger = LoggerFactory.getLogger(当前类名.class); 可以用注解@Slf4j
1.使用idea首先需要安装Lombok插件
![](http://upload-images.jianshu.io/upload_images/4724335-4c1a35e17649e190.png?imageMogr2/auto-orient/strip|imageView2/2/w/1200)
2.在pom文件加入lombok的依赖
<dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.16</version><!--版本号自己选一个就行--> </dependency>
3.类上面添加@Sl4j注解,然后使用log打印日志;
![](https://img2020.cnblogs.com/blog/1365514/202011/1365514-20201123125312750-1277571732.png)