JavaExercises/Experiments/Map2Xml.java at master · biblelamp/JavaExercises · GitHub

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// @see http://technojeeves.com/index.php/54-serialize-a-java-collection-with-the-streaming-api

import javax.xml.stream.*;

import java.io.*;

import java.util.*;

public class Map2Xml {

public static void main(String[] args) {

Map<String, Integer> m = Map2Xml.createRandomMap();

System.out.println("Starting map:");

System.out.println(m);

// Now write it as xml

try {

Map2Xml.toXml(m, new FileWriter("map2xml.xml"));

}

catch(IOException e) {

e.printStackTrace();

}

catch(XMLStreamException e) {

e.printStackTrace();

}

public static Map<String, Integer> createRandomMap() {

Map<String, Integer> m = new HashMap<String, Integer>(5);

for(char i = 'a';i < 'f';i++) {

m.put(String.valueOf(i), (int)(Math.random() * 99));

}

return m;

}

public static <K,V> void toXml(Map<K, V> map, Writer out) throws IOException, XMLStreamException {

XMLStreamWriter xsw = null;

try {

XMLOutputFactory xof = XMLOutputFactory.newInstance();

// If you want pretty-printing, you can use:

//xsw = new javanet.staxutils.IndentingXMLStreamWriter(xof.createXMLStreamWriter(out));

xsw = xof.createXMLStreamWriter(out);

//xsw.writeStartDocument("utf-8", "1.0");

xsw.writeStartElement("entries");

// Do the Collection

for(Map.Entry<K, V> e : map.entrySet()) {

xsw.writeStartElement("entry");

xsw.writeAttribute("key", e.getKey().toString());

xsw.writeAttribute("value", e.getValue().toString());

xsw.writeEndElement();

}

xsw.writeEndElement();

xsw.writeEndDocument();

}

finally {

if (out != null) {

try { out.close() ; } catch(IOException e) { /* ignore */ }

}

}// end inner finally

}

finally {

if (xsw != null) {

try { xsw.close() ; } catch(XMLStreamException e) { /* ignore */ }

}

JavaExercises/Experiments/Map2Xml.java at master · biblelamp/JavaExercises · GitHub

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