Tuesday, March 15, 2011

Reading the DocType via jdom

The DocType looks like this in xml:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

The first word after DOCTYPE indicates the name of the element being constrained, the word after PUBLIC is the document type's public identifier, and the last word is the document type's system identifier. The DocType is available by calling getDocType() on a Document, and the DocType class has methods to get the individual pieces of the DOCTYPE declaration.

DocType docType = doc.getDocType();
 System.out.println("Element: " + docType.getElementName());
 System.out.println("Public ID: " + docType.getPublicID());
 System.out.println("System ID: " + docType.getSystemID());

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Chitika