How to put tabs in xml file?

Question

I want to put tabs in xml file, e.g:
<?xml version="1.0" encoding="windows-1251"?>
<root name="root1">
<node name="leaf1"/>
<node name="leaf2"/>
<node name="node1">
<node name="leaf3"/>
<node name="leaf4"/>
<node name="node2">
<node name="leaf5"/>
</node>
</node>
<node name="leaf6"/>
<node name="node3">
<node name="node4">
<node name="leaf7"/>
</node>
</node>
</root>to:
<root name="root1">
     <node name="leaf1"></node>
     <node name="leaf2"></node>
     <node name="node1">
          <node name="leaf3"></node>
          <node name="leaf4"></node>
          <node name="node2">
               <node name="leaf5"></node>
          </node>
     </node>
     <node name="leaf6"></node>
     <node name="node3">
          <node name="node4">
               <node name="leaf7"></node>
          </node>
     </node>
</root>

Answer 1

For DOM users:
public static void serialize(Document doc, Writer writer)
    OutputFormat format = new OutputFormat(model, encoding, isToIndent); // model should be xhtml, xml, etc
    format.setOmitXMLDeclaration(!useProlog);
    if (useProlog)
      format.setStandalone(useStandalone);
    format.setOmitDocumentType(!useDocType);
    if (isToIndent)
      format.setIndent(indentSize);
    format.setLineSeparator(CR);
    XMLSerializer serial = new XMLSerializer(writer, format);
    try {
      serial.asDOMSerializer();
      serial.serialize(doc.getDocumentElement());
      writer.flush();
    } catch (IOException e) {
      System.err.println(e);
    } catch (Exception e) {
      System.err.println(e);
  }Take care with explicit global vars (amazing names like indentSize)
and go deeper!
[]'s