使用log4j2时，还要把log4j的jar文件导入吗？

我在springboot项目里根据上面介绍的配置方式使用log4j2，启动时控制台报错： Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_152] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_152] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[?:1.8.0_152] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_152] at com.alibaba.druid.filter.logging.Log4jFilter.(Log4jFilter.java:26) ~[druid-1.1.9.jar:1.1.9] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_152] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_152] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_152] at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_152] at java.lang.Class.newInstance(Class.java:442) ~[?:1.8.0_152] at com.alibaba.druid.filter.FilterManager.loadFilter(FilterManager.java:114) ~[druid-1.1.9.jar:1.1.9] at com.alibaba.druid.pool.DruidAbstractDataSource.addFilters(DruidAbstractDataSource.java:1286) ~[druid-1.1.9.jar:1.1.9] at com.alibaba.druid.pool.DruidAbstractDataSource.setFilters(DruidAbstractDataSource.java:1275) ~[druid-1.1.9.jar:1.1.9]

https://github.com/alibaba/druid/wiki/Druid%E4%B8%AD%E4%BD%BF%E7%94%A8log4j2%E8%BF%9B%E8%A1%8C%E6%97%A5%E5%BF%97%E8%BE%93%E5%87%BA

原提问者GitHub用户itinypocket