java操作Tomcat配置文件

Tomcat配置文件操作，加载配置文件，获取一个HTTPS端口号。仅供参考。

代码如下：

ServerXmlUtils.loadServerXml(tomcatConfPath + "/server.xml");
String tomcatHttpsPort  = ServerXmlUtils.getAnHTTPSPort();

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.File;

/**
 * Tomcat配置文件操作
 * @author 
 * @date
 */
public class ServerXmlUtils {

    private static NodeList childNodes;
    private static Element serviceItem;
    private static Document doc;
    private static File file;

    /**
     * 加载配置文件
     * @param serverXmlFileName
     * @throws Exception
     */
    public static void loadServerXml(String serverXmlFileName) throws Exception {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        dbf.setIgnoringElementContentWhitespace(true);
        file = new File(serverXmlFileName);
        DocumentBuilder db = dbf.newDocumentBuilder();
        doc = db.parse(file);
        //获取根root模块
        Element root = doc.getDocumentElement();
        NodeList service = root.getElementsByTagName("Service");

        //获取Service模块
        serviceItem = (Element) service.item(0);
        //获取Service子Nodes
        childNodes = serviceItem.getChildNodes();
    }

    /**
     * 获取一个HTTPS端口号
     * @return String
     */
    public static String getAnHTTPSPort(){
        for (int i = 0; i < childNodes.getLength(); i++) {
            Node item = childNodes.item(i);
            String nodeName = childNodes.item(i).getNodeName();
            //当遍历到Service的Connector时
            if ("Connector".equalsIgnoreCase(nodeName)) {
                Element element = (Element) item;
                String clientAuth =  element.getAttribute("clientAuth");
                String sslEnabled =  element.getAttribute("SSLEnabled");
//                logger.debug("clientAuth:[{}] SSLEnabled:[{}] SSLEnabled:[{}] ",clientAuth,sslEnabled,element.getAttribute("port"));
                if ("true".equalsIgnoreCase(sslEnabled)) {
                    if("".equals(clientAuth) || "false".equalsIgnoreCase(clientAuth)){
                        return  element.getAttribute("port");
                    }
                }
            } else {
                continue;
            }
        }
        return null;
    }
}