提示：
The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path
解决方法：
Debian 10命令：apt install libapr1-dev libssl-dev gcc make
CentOS 8命令：yum install apr-devel openssl-devel gcc make
cd到tomcat9目录/bin
tar -zxvf tomcat-native.tar.gz
cd到tomcat9目录/bin/tomcat-native-1.2.23-src/native
./configure && make && make install
创建文件setenv.sh保存到tomcat9目录/bin，文件内容如下： LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/apr/lib
export LD_LIBRARY_PATH