how to generate a xml file on submit action with all the form data (XML forum at Coderanch)

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posted 13 years ago

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Can you share what have you tried and what is not working

The general steps for achieving this would be
1. Read the request
2. Create a file and populate the file based on the request parameters and your business logic
3. Write the file to the response's outputstream

Note: remember to set the content type appropriately

satnam singh negi

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posted 13 years ago

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DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = builderFactory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
  new MyServletName().createXmlTree(doc,req);

// here goes my methode

private void createXmlTree(Document doc,HttpServletRequest req){
		
	
        Element root = doc.createElement("html");
         doc.appendChild(root);

//add child to root and so on..
        Element child = doc.createElement("form");
        child.setAttribute("name","send request");
        child.setAttribute("Method","Post");
        child.setAttribute("action",formUrl);
       // child.setAttribute("action", retUrl);
        root.appendChild(child);

//     
         Element child2 = doc.createElement("input");
        child2.setAttribute("type", "hidden");
        child2.setAttribute("name", "version");
        child2.setAttribute("value", req.getParameter("version"));
        
           child.appendChild(child2);

// and some more child elements go after that

//TransformerFactory instance is used to create Transformer objects.

TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = null;
		try {
			transformer = factory.newTransformer();
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			System.out.println("Throughing Exception");
			e.printStackTrace();
		}

// create string from xml tree

StringWriter sw = new StringWriter();
        StreamResult result = new StreamResult(sw);
        DOMSource source = new DOMSource(doc);
        try {
			transformer.transform(source, result);
		} catch (TransformerException e) {
			System.out.println("Transformation doesnt happend");
			e.printStackTrace();
		}
        String xmlString = sw.toString();

File file = new File("filepath/file.xml");

This all work perfect for me . so the actual problem has been resolved, but now when i read the same generated file then there is always fetal error,

The element type "input" must be terminated by the matching end-tag

also when the xml file got generated it doesnt show on the top of document

how to achieve this,please share your comments !!

Thanks

satnam singh negi

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Posts: 25

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posted 13 years ago

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Ashwin Sridhar wrote:Try using DOM Parsers. Share your code, to improve on it.

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = builderFactory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
  new MyServletName().createXmlTree(doc,req);

// here goes my methode

private void createXmlTree(Document doc,HttpServletRequest req){
		
	
        Element root = doc.createElement("html");
         doc.appendChild(root);

//add child to root and so on..
        Element child = doc.createElement("form");
        child.setAttribute("name","send request");
        child.setAttribute("Method","Post");
        child.setAttribute("action",formUrl);
       // child.setAttribute("action", retUrl);
        root.appendChild(child);

//     
         Element child2 = doc.createElement("input");
        child2.setAttribute("type", "hidden");
        child2.setAttribute("name", "version");
        child2.setAttribute("value", req.getParameter("version"));
        
           child.appendChild(child2);

// and some more child elements go after that

//TransformerFactory instance is used to create Transformer objects.

TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer = null;
		try {
			transformer = factory.newTransformer();
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			System.out.println("Throughing Exception");
			e.printStackTrace();
		}

// create string from xml tree

StringWriter sw = new StringWriter();
        StreamResult result = new StreamResult(sw);
        DOMSource source = new DOMSource(doc);
        try {
			transformer.transform(source, result);
		} catch (TransformerException e) {
			System.out.println("Transformation doesnt happend");
			e.printStackTrace();
		}
        String xmlString = sw.toString();

File file = new File("filepath/file.xml");

This all work perfect for me . so the actual problem has been resolved, but now when i read the same generated file then there is always fetal error,

The element type "input" must be terminated by the matching end-tag

also when the xml file got generated it doesnt show on the top of document

how to achieve this,please share your comments !!

Thanks

satnam singh negi

Greenhorn

Posts: 25

I like...

posted 13 years ago

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Paul Clapham wrote:You're producing a string containing some XML, but then you say something about a "generated file". I don't see any code which generates a file there.

the file got generated in my local machine and it looks like this

i am reading this file with this code

but it does'nt parse the file, as it through an exception like "input" element must have end tag "input"

Please suggest !!

satnam singh negi

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Posts: 25

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posted 13 years ago

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Paul Clapham wrote:The error message is exactly correct. You don't have well-formed XML there.

However the code you posted does produce well-formed XML. So the data you posted wasn't produced by the code you posted.

right paul ,i am able to create a xml but with some restrictions. like if use an Element object and then i set the attributes of it, it does produce the well formed tag with xml but without a end tag.

still looking that how can i achieve this. another approach is like i shall read the file as string and then i have to manipulate it by inserting the end tag and then parse.

will it be a good idea ?