java - XML 文件没有循环通过 Out

Question

我对这段代码感到震惊，我有一个巨大的 xml 文件，其中包含需要更新的各种“服务器”、“端口”标签。当我执行下面的代码时，只有第一个服务器和端口号得到更新，它不会循环遍历整个代码并更改所有端口和服务器标记，我没有收到任何错误，但无法循环遍历代码:

import java.io.File;
import java.io.IOException;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;    
public class XMLFile {        
    public static final String xmlFilePath ="C:\\Users\\c200433\\Desktop\\Kommu234.twb";        
    public static void main(String argv[]) {        
        try {        
            DocumentBuilderFactory documentBuilderFactory =         DocumentBuilderFactory.newInstance();    
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();    
            Document document = documentBuilder.parse(xmlFilePath);    
            Node employee = document.getElementsByTagName("connection").item(0);    
            NamedNodeMap attribute = employee.getAttributes();
            Node nodeAttr = attribute.getNamedItem("server");
            nodeAttr.setTextContent("aventador.a:1530");
            Node nodeAttr1 = attribute.getNamedItem("service");
            Node nodeAttr2 = attribute.getNamedItem("port");
             nodeAttr1.setTextContent("tst806");
              nodeAttr2.setTextContent(""); // Value is correct but doesnt get looped through                                       
            TransformerFactory transformerFactory = TransformerFactory.newInstance();

            Transformer transformer = transformerFactory.newTransformer();
            DOMSource domSource = new DOMSource(document);

            StreamResult streamResult = new StreamResult(new File(xmlFilePath));                  transformer.transform(domSource, streamResult);

            System.out.println("The XML File was ");    
        } catch (ParserConfigurationException pce) {
            pce.printStackTrace();
        } catch (TransformerException tfe) {
            tfe.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (SAXException sae) {
            sae.printStackTrace();
        }
    }
}

Answer 1

在 NodeEmployee = document.getElementsByTagName("connection").item(0); 行上，您仅获得一个节点。

如果你这样做

NodeList employees = document.getElementsByTagName("connection");
for(int i = 0; i < employees.getLength(); i++) {
    Node employee = employees.item(i);
    ....
}

您应该迭代它们。