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The Java Developers Almanac 1.4Order this book from Amazon. |
e541. Adding a Comment to a DOM DocumentWhen creating a comment node, the string `-- ' must never appear
in the comment text. The default XML writers in J2SE 1.4 will output the
comment text with the `-- ' and therefore generate invalid XML.
// Obtain an XML document; this method is implemented in // e510 The Quintessential Program to Create a DOM Document from an XML File Document doc = parseXmlFile("infilename.xml", false); // Add a comment at the beginning of the document Element element = doc.getDocumentElement(); Comment comment = doc.createComment("A Document Comment"); element.getParentNode().insertBefore(comment, element); // Find all elements with the name "entry" and append a comment NodeList list = doc.getElementsByTagName("entry"); for (int i=0; i<list.getLength(); i++) { element = (Element)list.item(i); comment = doc.createComment("index="+i); // Add the comment after this element element.getParentNode().insertBefore(comment, element.getNextSibling()); } // "--" must never appear in the text used to create the comment comment = doc.createComment("invalid -- comment"); boolean validComment = comment.getNodeValue().indexOf("--") < 0;This is the sample input for the example: <?xml version="1.0" encoding="UTF-8"?> <map> <entry key="key1" value="value1" /> <entry key="key2" /> </map>The resulting XML from running the example is: <?xml version="1.0" encoding="UTF-8"?> <!--A Document Comment--><map> <entry key="key1" value="value1"/><!--index=0--> <entry key="key2"/><!--index=1--> </map>
e540. Adding a CDATA Section to a DOM Document e542. Adding a Processing Instruction to a DOM Document e543. Adding a Text Node to a DOM Document e544. Removing a Node from a DOM Document
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