Reading
XML with java can be done easily if you are using the Java API for XML
Processing. You can download this API and if you want the specifications
too from the Sun Microsystems website.
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Once
you have the Java API in place, it is needed to have the proper imports
in your program. Typical imports statements might have,
import
org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
The next
step is to create a document object to load the XML file that should
be read. If you have loaded the XML object then it is easy to traverse
the nodes of the XML document and access all the nodes of the XML document.
Creating a document object involves three steps as given in the code
below.
DocumentBuilderFactory
fact = DocumentBuilderFactory.newInstance();
DocumentBuilder db = fact.newDocumentBuilder();
doc = db.newDocument();
once the
document object is loaded with the XML document you can use the methods
like getDocumentElement().getNodeName() to get the root node of the
XML document and use getElementsByTagName() to get all the elements
of a particular name and then loop through them to display them.
Methods
to change the attributes, create attributes, change nodes, and to remove
nodes are also available.
