在java中保存XML文件为TXT

问题描述 投票：0回答：1

我从XML标签中检索我需要的数据.我在这方面使用了相对包.现在我想把结果保存在一个.txt文件中，但我不知道如何在我的代码中使用FileWriter，我试了几次，但我得到了一个空白的文本文件，没有在控制台中打印结果。谁能帮我把结果保存在txt文件中？

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

public class Sample {

  public static void main(String argv[]) {

    try {
//SourceFile
    File fXmlFile = new File("~/Downloads/Teacher.xml");
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);

/我的代码是：doc.getDocumentElement().normalize()。

    System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
//Teacher name tags
    NodeList nList = doc.getElementsByTagName("TeacherName");

    System.out.println("----------------------------");

    for (int temp = 0; temp < nList.getLength(); temp++) {

        Node nNode = nList.item(temp);

        System.out.println("\nCurrent Element :" + nNode.getNodeName());

        if (nNode.getNodeType() == Node.ELEMENT_NODE) {

            Element eElement = (Element) nNode;

            System.out.println("Name: " + eElement.getElementsByTagName("Name").item(0).getTextContent());
        }
        }

        }
    }
    } catch (Exception e) {
    e.printStackTrace();
    }
  }

}
java xml tags package simple-xml-converter
1个回答
1
投票

结果分享如下。这只是一个虚拟的测试，因为我已经做了。我想知道如何将其保存在文本文件中？

TeacherName 
--------------------------------
Sara 
Marry
John
0
投票

你做的是这样的

// write the content into xml file
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();
    DOMSource source = new DOMSource(doc);
    StreamResult result = new StreamResult(new File("C:\\file.xml"));

    // Output to console for testing
    // StreamResult result = new StreamResult(System.out);

    transformer.transform(source, result);

更多内容你可以在。https:/mkyong.comjavah如何创建xml-file-in-java-dom。

作为替代方法，你可以使用transform方法将其传递给StringWriter.the你可以这样做，因为你有一个字符串，你可以将其传递给StringWriter。

StringWriter sw = new StrinWriter();
transformer.transform(source, new StreamResult(sw));
FileWriter fw = new FileWriter("file.txt")
fw.write(sw.toString();
fw.close()
0
投票

给你。

    package XMLConvertor;
    import javax.xml.parsers.DocumentBuilderFactory;
    import javax.xml.parsers.DocumentBuilder;
    import org.w3c.dom.Document;
    import org.w3c.dom.NodeList;
    import org.w3c.dom.Node;
    import org.w3c.dom.Element;
    import java.io.File;
    import javax.xml.transform.Transformer;
    import javax.xml.transform.TransformerException;
    import javax.xml.transform.TransformerFactory;
    import javax.xml.transform.dom.DOMSource;
    import javax.xml.transform.stream.StreamResult

    public class Sample {

      public static void main(String argv[]) {

        try {
    //SourceFile
        File fXmlFile = new File("~/Downloads/Teacher.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);
// write the content into xml file
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();
    DOMSource source = new DOMSource(doc);
    StreamResult result = new StreamResult(new File("~/Downloads/file.xml"));

    // Output to console for testing
    // StreamResult result = new StreamResult(System.out);

    transformer.transform(source, result);
     System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
    //Teacher name tags
        NodeList nList = doc.getElementsByTagName("TeacherName");

        System.out.println("----------------------------");

        for (int temp = 0; temp < nList.getLength(); temp++) {

            Node nNode = nList.item(temp);

            System.out.println("\nCurrent Element :" + nNode.getNodeName());

            if (nNode.getNodeType() == Node.ELEMENT_NODE) {

                Element eElement = (Element) nNode;

                System.out.println("Name: " + eElement.getElementsByTagName("Name").item(0).getTextContent());
            }
            }

            }
        }
        } catch (Exception e) {
        e.printStackTrace();
        }
      }

    }
0
投票

这里是绝对路径的代码

File fXmlFile = new File("/home/user/Downloads/Teacher.xml");
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);

        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new File("/home/user/Downloads/file.xml"));
        transformer.transform(source, result);

这里我们替换掉"~"。

File fXmlFile = new File("~/Downloads/file.xml".replaceFirst("^~", System.getProperty("user.home")));
            DocumentBuilderFactory dbFactory = 
  DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            Document doc = dBuilder.parse(fXmlFile);

            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(doc);
            StreamResult result = new StreamResult(new File("~/Downloads/file.xml".replaceFirst("^~", System.getProperty("user.home"))));
            transformer.transform(source, result);
0
投票

好吧，根据你的回答，我有这个代码给你，我已经用一个Strin builder来存储输出，并用FileWriter把它们写到一个txt文件中。

 public static void main(String[] args)
{

    try
    {

        File fXmlFile = new File("~/Downloads/Teacher.xml".replaceFirst("^~", System.getProperty("user.home")));
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);



        System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
        //Teacher name tags

        StringBuilder result = new StringBuilder(doc.getDocumentElement().getNodeName() + "\n----------------------------\n");

        NodeList nList = doc.getElementsByTagName("TeacherName");

        System.out.println("----------------------------");

        for (int temp = 0; temp < nList.getLength(); temp++)
        {
            Node nNode = nList.item(temp);
            System.out.println("\nCurrent Element :" + nNode.getNodeName());
            if (nNode.getNodeType() == Node.ELEMENT_NODE)
            {
                Element eElement = (Element) nNode;
                System.out.println("Name: " + eElement.getElementsByTagName("Name").item(0).getTextContent());
                result.append(String.format("%s\n", eElement.getElementsByTagName("Name").item(0).getTextContent()));
            }
        }

        FileWriter writer = new FileWriter(new File("~/Downloads/file.xml".replaceFirst("^~", System.getProperty("user.home"))));
        writer.write(result.toString());
        writer.close();
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

我已经测试了这段代码，它可以运行:)

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