XML file containing multiple root elements

Question

I have a file which contains multiple sets of root elements. How can I extract the root element one by one?

This is my XML

Answer 1

Use java.io.SequenceInputStream to trick xml parser:

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilderFactory;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.SequenceInputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class MultiRootXML{
    public static void main(String[] args) throws Exception{
        List streams = Arrays.asList(
                new ByteArrayInputStream("".getBytes()),
                new FileInputStream("persons.xml"),
                new ByteArrayInputStream("".getBytes())
        );
        InputStream is = new SequenceInputStream(Collections.enumeration(streams));
        Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(is);
        NodeList children = doc.getDocumentElement().getChildNodes();
        for(int i=0; i