查看tomcat运行的端口号

<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" />

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

public class TomcatPortChecker {
    public static void main(String[] args) {
        try {
            File configFile = new File("<Tomcat安装目录>/conf/server.xml");
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            Document doc = dBuilder.parse(configFile);
            doc.getDocumentElement().normalize();

            NodeList nList = doc.getElementsByTagName("Connector");
            for (int temp = 0; temp < nList.getLength(); temp++) {
                Element eElement = (Element) nList.item(temp);
                String port = eElement.getAttribute("port");
                System.out.println("Tomcat Port: " + port);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}