Zapis do pliku XML w Javie

Question

pracuję na poniższym kodzie:

import java.io.*; 
import javax.xml.parsers.*; 
import javax.xml.transform.*; 
import javax.xml.transform.dom.*; 
import javax.xml.transform.stream.*; 
import org.w3c.dom.*; 

public class CreatXMLFile { 
    public static void main(String[] args) throws Exception { 
    BufferedReader bf = new BufferedReader(new InputStreamReader(System.in)); 
// System.out.print("Enter number to add elements in your XML file: "); 
// String str = bf.readLine(); 
    int no=2; 
// System.out.print("Enter root: "); 
    String root = "SMS"; 
    DocumentBuilderFactory documentBuilderFactory =DocumentBuilderFactory.newInstance(); 

     DocumentBuilder documentBuilder =documentBuilderFactory.newDocumentBuilder(); 

     Document document = documentBuilder.newDocument(); 

    Element rootElement = document.createElement(root); 

     document.appendChild(rootElement); 
// for (int i = 1; i <= no; i++) 
//  System.out.print("Enter the element: "); 
//  String element = bf.readLine(); 
     String element ="Number"; 
     System.out.print("Enter the Number: "); 
     String data = bf.readLine(); 
     Element em = document.createElement(element); 
     em.appendChild(document.createTextNode(data)); 
     rootElement.appendChild(em); 

     String element1 ="message"; 
     System.out.print("Enter the SMS: "); 
     String data1 = bf.readLine(); 
     Element em1 = document.createElement(element1); 
     em1.appendChild(document.createTextNode(data1)); 
     rootElement.appendChild(em1); 

    TransformerFactory transformerFactory = TransformerFactory.newInstance(); 
     Transformer transformer = transformerFactory.newTransformer(); 
     DOMSource source = new DOMSource(document); 
     StreamResult result = new StreamResult(System.out); 
     transformer.transform(source, result); 

    } 
} 

I daje następujący wynik:

run: 
Enter the Number: 768678 
Enter the SMS: ytu 
<?xml version="1.0" encoding="UTF-8" standalone="no"?><SMS><Number>768678</Number><message>ytu</message></SMS>BUILD SUCCESSFUL (total time: 8 seconds) 

Teraz chcę napisać wygenerowany wyjścia (<?xml version="1.0" encoding="UTF-8" standalone="no"?><SMS><Number>768678</Number><message>ytu</message></SMS>) do pliku XML na dysku twardym. Jak mam to zrobić?

Answer 1

Użyj FileOutputStream (lub File) zamiast System.out, aby zbudować swoją StreamResult.

Answer 2

Oto kompletne rozwiązanie dla tego pytania:

import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.StringWriter; 

import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.parsers.ParserConfigurationException; 
import javax.xml.transform.OutputKeys; 
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; 

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

public class CreatXml { 

    /** 
    * @param args 
    * @throws TransformerException 
    * @throws ParserConfigurationException 
    * @throws IOException 
    */ 
    public static void main(String[] args) throws TransformerException, ParserConfigurationException, IOException { 
     // TODO Auto-generated method stub 
     BufferedReader bf = new BufferedReader(new InputStreamReader(System.in)); 
//  System.out.print("Enter number to add elements in your XML file: "); 
//  String str = bf.readLine(); 
     int no=2; 
//  System.out.print("Enter root: "); 
     String root = "SMS"; 
     DocumentBuilderFactory documentBuilderFactory =DocumentBuilderFactory.newInstance(); 

      DocumentBuilder documentBuilder =documentBuilderFactory.newDocumentBuilder(); 

      Document document = documentBuilder.newDocument(); 

     Element rootElement = document.createElement(root); 

      document.appendChild(rootElement); 
//  for (int i = 1; i <= no; i++) 
//  System.out.print("Enter the element: "); 
//  String element = bf.readLine(); 
      String element ="Number"; 
      System.out.print("Enter the Number: "); 
      String data = bf.readLine(); 
      Element em = document.createElement(element); 
      em.appendChild(document.createTextNode(data)); 
      rootElement.appendChild(em); 

      String element1 ="message"; 
      System.out.print("Enter the SMS: "); 
      String data1 = bf.readLine(); 
      Element em1 = document.createElement(element1); 
      em1.appendChild(document.createTextNode(data1)); 
      rootElement.appendChild(em1); 

     TransformerFactory transformerFactory = TransformerFactory.newInstance(); 
      Transformer transformer = transformerFactory.newTransformer(); 
      DOMSource source = new DOMSource(document); 

      StreamResult result = new StreamResult(new StringWriter()); 

      //t.setParameter(OutputKeys.INDENT, "yes"); 
      transformer.setOutputProperty(OutputKeys.INDENT, "yes"); 
      transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "5"); 
      transformer.transform(source, result); 

      //writing to file 
      FileOutputStream fop = null; 
      File file; 
      try { 

       file = new File("/home/zurelsoft/Desktop/newfile1.txt"); 
       fop = new FileOutputStream(file); 

       // if file doesnt exists, then create it 
       if (!file.exists()) { 
        file.createNewFile(); 
       } 

       // get the content in bytes 
       String xmlString = result.getWriter().toString(); 
       System.out.println(xmlString); 
       byte[] contentInBytes = xmlString.getBytes(); 

       fop.write(contentInBytes); 
       fop.flush(); 
       fop.close(); 

       System.out.println("Done"); 

      } catch (IOException e) { 
       e.printStackTrace(); 
      } finally { 
       try { 
        if (fop != null) { 
         fop.close(); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 

    } 

}