Creating Blank DOM Document
This tutorial shows you how to create blank DOM
document. JAXP (Java API for XML Processing) is a Java interface that provides a
standard approach to Parsing XML documents. With JAXP, we will use the Document
BuilderFactory to create DocumentBuilder class.
The class DocumentBuilderFactory is responsible
for creating new DOM parsers. Normally it is used to a DOM parser. Example is as
follows:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
Document doc = parser.parse(myInputSource); //The parse function is used
to parse existing xml document.
DocumentBuilderFactory uses the system property
javax.xml.parsers.XmlDocumentParserFactory to find the class to load. So you can
change the parser by calling:
System.setProperty("javax.xml.parsers.XmlDocumentParserFactory",
"com.foo.myFactory");
The instance of the class DocumentBuilder is
used to create a blank document. The newDocument() method of the class
returns a blank DOM document.
Document doc = parser.newDocument();
Here is the full code of CreateBlankDocument.java
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
public class CreateBlankDocument
{
public static void main(String[] args)
{
System.out.println("Creating Balnk Document...");
try{
//Create instance of DocumentBuilderFactory
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
//Get the DocumentBuilder
DocumentBuilder parser = factory.newDocumentBuilder();
//Create blank DOM Document
Document doc = parser.newDocument();
}catch(Exception e){
System.out.println(e.getMessage());
}
System.out.println("Done...");
System.out.println("Exiting...");
}
}
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In the next section I will show you how to add root and
child elements to the blank document. Saving the DOM tree to the disk file is
also discussed in the next secion.
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