Merging xml file using java NodeList

Question

I'm trying to merge two xml files as shown below but i can't able to get the desired output please help me thank you

Java code:

DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();   
domFactory.setIgnoringComments(true);  
DocumentBuilder builder = domFactory.newDocumentBuilder();   
Document doc = builder.parse(new File("file1.xml"));   
Document doc1 = builder.parse(new File("file2.xml"));   

NodeList nodes = doc.getElementsByTagName("staff");  

NodeList nodes1 = doc1.getElementsByTagName("staff");

for(int i=0;i<nodes1.getLength();i=i+1){  

Node n= (Node) doc.importNode(nodes1.item(i), true);  
nodes.item(i).getParentNode().appendChild(n);

}  

Transformer transformer = TransformerFactory.newInstance().newTransformer();  
transformer.setOutputProperty(OutputKeys.INDENT, "yes");  

StreamResult result = new StreamResult(new StringWriter());  
DOMSource source = new DOMSource(doc);  
transformer.transform(source, result);  
Writer output = null;
output = new BufferedWriter(new FileWriter("mergedxml.xml"));

String xmlOutput = result.getWriter().toString();  
output.write(xmlOutput);
output.close();
System.out.println("merge complete");

File1.xml

    <company>
        <staff>
            <name>john</name>
            <phone>465456433</phone>
            <email>gmail1</email>
        </staff>
    </company>

File2.xml

    <company>
        <staff>
            <area>area1</area>
            <city>city1</city>
        </staff>
    </company>

Current output:

    <company>
        <staff>
            <name>john</name>
            <phone>465456433</phone>
            <email>gmail1</email>
        </staff>
        <staff>
            <area>area1</area>
            <city>city1</city>
        </staff>
    </company>

Expected Output:

    <company>
        <staff>
            <name>john</name>
            <phone>465456433</phone>
            <email>gmail1</email>
            <area>area1</area>
            <city>city1</city>
        </staff>
    </company>

Answer 1

In order to do that on your own. You should do this following :

public static void mergeXML(){


    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = null;
    Document doc = null;
    Document doc2 = null;

    try {
            db = dbf.newDocumentBuilder();
            doc = db.parse(new File("D:\\Loic_Workspace\\Test2\\res\\test.xml"));
            doc2 = db.parse(new File("D:\\Loic_Workspace\\Test2\\res\\test2.xml"));
            NodeList ndListFirstFile = doc.getElementsByTagName("staff");

            Node nodeArea = doc.importNode(doc2.getElementsByTagName("area").item(0), true);
            Node nodeCity = doc.importNode(doc2.getElementsByTagName("city").item(0), true);
            ndListFirstFile.item(0).appendChild(nodeArea);
            ndListFirstFile.item(0).appendChild(nodeCity);

          TransformerFactory tFactory = TransformerFactory.newInstance();
          Transformer transformer = tFactory.newTransformer();
          transformer.setOutputProperty(OutputKeys.INDENT, "yes");  

          DOMSource source = new DOMSource(doc);
          StreamResult result = new StreamResult(new StringWriter());
          transformer.transform(source, result); 

          Writer output = new BufferedWriter(new FileWriter("D:\\Loic_Workspace\\Test2\\res\\testFinal.xml"));
          String xmlOutput = result.getWriter().toString();  
          output.write(xmlOutput);
          output.close();

    } catch (ParserConfigurationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SAXException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (TransformerException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


}

Final output of testFinal.xml :

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
<company>
 <staff>
 <name>john</name>
 <phone>465456433</phone>
 <email>gmail1</email>
 <area>area1</area>
<city>city1</city>
</staff>
 </company>

As you want it ;-)

Hope it helps,