[StaX Parser] Chunking a huge XML File

ratnalein · June 14th, 2014, 07:31 PM

Hallo everyone,

I would like to split a XML File with multiple repeated Tag. I found the ideal example in internet and the solution in Java:

Input XML:

Code:

<statements>
   <statement account="123">
      ...stuff...
   </statement>
   <statement account="456">
      ...stuff...
   </statement>
</statements>

I would like to chunk this one XML File into a list of String for the tag statement:

Code:

<statement account="123">
		...stuff...
</statement>

...
...
...

Code:

<statement account="456">
		...stuff...
</statement>

The below solution does the main purpose, though each chunk is going to be an independent XML File:

Code:

import java.io.File;
import java.io.FileReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamResult;

public class Demo {

    public static void main(String[] args) throws Exception  {
        XMLInputFactory xif = XMLInputFactory.newInstance();
        XMLStreamReader xsr = xif.createXMLStreamReader(new FileReader("input.xml"));
        xsr.nextTag(); // Advance to statements element

        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer t = tf.newTransformer();
        while(xsr.nextTag() == XMLStreamConstants.START_ELEMENT) {
            File file = new File("out/" + xsr.getAttributeValue(null, "account") + ".xml");
            t.transform(new StAXSource(xsr), new StreamResult(file));
        }
    }

My question or my problem:
I would like to put the chuncks as a list of String. Is there a chance for me to implement this directly? Thank you for the comments.

Regards,

Ratna