Question

我正在尝试将我的XML文件中的打印机（printerName）的特定IP地址读入我的java程序。这是XML的开头，我想抓住一个打印机名称......

<?xml version="1.0" encoding="UTF-8"?>
<Platform>
    ############################
    #Printer Specific ##########
    ############################

    <THISPrinter name="Printer" printerName="172.27.17.200" version="v2.1.113" />

因为我只需要printerName，所以我认为我不需要创建一个for循环来创建像我在这个完全不相关的例子中找到的节点和元素......

 NodeList nList = doc.getElementsByTagName("employee");
  for (int temp = 0; temp < nList.getLength(); temp++)
  {
     Node node = nList.item(temp);
     if (node.getNodeType() == Node.ELEMENT_NODE)
     {
        Element eElement = (Element) node;
        //Create new Employee Object
        employee = new Employee();
        employee.setId(Integer.parseInt(eElement.getAttribute("id")));
        employee.setFirstName(eElement.getElementsByTagName("firstName").item(0).getTextContent());
        employee.setLastName(eElement.getElementsByTagName("lastName").item(0).getTextContent());
        employee.setLocation(eElement.getElementsByTagName("location").item(0).getTextContent());

        //Add Employee to list
        employees.add(employee);
     }
  }

以下是我尝试获取printerName ...但该程序没有对它执行任何操作，之后又出现问题。任何建议都会很棒！

    String printerName = doc.getElementsByTagName("SaberK3Printer").item(1).getTextContent();
    System.out.println(printerName);

Answer 1

我想通了，我需要让Node打印机然后指定什么attr和我这是printerName！然后我在我的JTextField中设置IP地址......

  public void setIPAddress() throws IOException, ParserConfigurationException, SAXException{ 
    try{
    //hardcoded file path to where printer ip is located
    File fXmlFile = new File("/Users/SRC/PerfTest/BaseTest/XML/SaberPlatform.xml");
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);

    doc.getDocumentElement().normalize(); //suggested to do

    System.out.println("Root element : " + doc.getDocumentElement().getNodeName());//should be Platform during execution 

    Node printer = doc.getElementsByTagName("SaberK3Printer").item(0);
    NamedNodeMap attr = printer.getAttributes();
    Node nodeAttr = attr.getNamedItem("printerName");
    System.out.println(nodeAttr);
    int firstQuote = nodeAttr.toString().indexOf("\"");
    String shortenedIP = nodeAttr.toString().substring(firstQuote + 1, nodeAttr.toString().length() - 1);
    ipText.setText(shortenedIP);
    }

    catch (IOException e){
    System.out.println("ip .xml file not found");
    }
    catch(ParserConfigurationException d){
    System.out.println("ParserConfigurationException thrown in setIPAddress");
    }
    catch(SAXException f){
    System.out.println("SAXException thrown in setIPAddress");
    }
}//end of setIPAddress

在java程序中读取xml

1 个答案: