如何使用java代码启动和停止tomcat？

import org.apache.catalina.startup.Bootstrap;

public class TomcatStarter {
    public static void main(String[] args) {
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import org.apache.catalina.startup.Bootstrap;

public class TomcatStopper {
    public static void main(String[] args) {
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.stop();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}