Adding a Processing Instruction to a DOM Document
// Obtain an XML document; this method is implemented in
// The Quintessential Program to Create a DOM Document from an XML File
Document doc = parseXmlFile("infilename.xml", false);
// Add a PI at the beginning of the document
Element element = doc.getDocumentElement();
ProcessingInstruction pi = doc.createProcessingInstruction("target", "instruction");
element.getParentNode().insertBefore(pi, element);
// Find all elements with the name "entry" and add a child PI
NodeList list = doc.getElementsByTagName("entry");
for (int i=0; i<list.getLength(); i++) {
element = (Element)list.item(i);
pi = doc.createProcessingInstruction("target", "instruction="+i);
// Add the comment to this element
element.appendChild(pi);
}
<?xml version="1.0" encoding="UTF-8"?>
<map>
<entry key="key1" value="value1" />
<entry key="key2" />
</map>
<?xml version="1.0" encoding="UTF-8"?>
<?target instruction?>
<map>
<entry key="key1" value="value1"><?target instruction=0?></entry>
<entry key="key2"><?target instruction=1?></entry>
</map>
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