"XML" parses XML files using DOM

Import java.io.IOException;
Import Javax.xml.parsers.DocumentBuilder;
Import Javax.xml.parsers.DocumentBuilderFactory;

Import javax.xml.parsers.ParserConfigurationException;
Import org.w3c.dom.Document;
Import org.w3c.dom.Element;
Import Org.w3c.dom.NamedNodeMap;
Import Org.w3c.dom.Node;
Import org.w3c.dom.NodeList;

Import org.xml.sax.SAXException; /** * Use DOM to parse XML file * @author Admin * * * * public class Main {public static void main (string[] args) {//Create a Documen
		
		The object of tbuilderfactory documentbuilderfactory dbf = Documentbuilderfactory.newinstance ();
			try {//Create Documentbuilder object Documentbuilder db = Dbf.newdocumentbuilder ();
			Loading book.xml to the current directory via the parse method of the Documentbuilder object document = Db.parse ("Demo/book.xml");
			Gets the collection of all book nodes nodelist Booklist = document.getElementsByTagName ("book");
			The length System.out.println of Booklist is obtained by means of the GetLength () method of NodeList ("There are:" +booklist.getlength () + "book"); for (int i=0;i<booklist.getlength (); i++) {System.out.println ("Begin traversing the first" + (i+1) + "The contents of this book");
				Get a book node by the item (i) = Booklist.item (i);
				Gets a collection of all the properties of the book node NamedNodeMap attrs = Book.getattributes ();
				System.out.println ("The first" + (i+1) + "This book has a total of" +attrs.getlength () + "attributes"); Iterate through the book's properties for (int j=0;j<attrs.getlength (), j + +) {//Gets a property of the book node attr = Attrs.item (j) through the item (index) method.
					);
					Gets the property name System.out.print ("Property name:" +attr.getnodename () + ",");	
				Gets the property value System.out.println ("Property value:" +attr.getnodevalue ()); The * * * can be traversed with the following method when knowing the value of the book's property, and there is only one ID attribute * To cast the book node to the element type element book = (eleme
				NT) Booklist.item (i);
				String AttrValue = Book.getattribute ("id");
				SYSTEM.OUT.PRINTLN ("id's property value is" +attrvalue);
				*//parse the child node of the book node nodelist childnodes = Book.getchildnodes ();
				Traversal childnodes Gets the node name and node value of each node System.out.println ("the first" + (i+1) + "This book has" +childnodes.getlength () + "child Node"); for (int k=0;k<childnodes.getlength (); k++) {//distinguish between node of text type and element class-Type node if (Childnodes.item (k). Getnodetype () ==node.element_node) {//Gets the node name System.out.print ("node
						Name: "+childnodes.item (k). Getnodename () +", ");
						System.out.println ("Node value:" +childnodes.item (k). Getfirstchild (). Getnodevalue ());
					System.out.println ("Node value:" +childnodes.item (k). Getfirstchild (). Gettextcontent ());
		catch (Parserconfigurationexception e) {e.printstacktrace ()}}};
		catch (Saxexception e) {e.printstacktrace ();
		catch (IOException e) {e.printstacktrace ();
 }
	}

}

Book.xml structure

<?xml version= "1.0" encoding= "UTF-8"?>
<bookstore>
	<book id= "1" >
		<name> Anderson fairy tale </name>
		<author> Anderson </author>
		<year>2016</year>
		<page>521</ page>
	</book>
	
	<book id= "2" >
		<name> famous Detective Conan </name>
		<author> Qingshan Chang </author>
		<year>1996</year>
		<page>5412</page>
	</book>
</bookstore>

Output results

Altogether there are: 2 books

The following begins to traverse the 1th book

The 1th book has a total of 1 properties

Property name: ID, property value: 1

The 1th book has 9 sub nodes

Section call: Name, node value: Anderson fairy tale

Section name: Author, node value: Anderson

Section name: Year, node value: 2016

Section Roll Name: page, node value: 521

The following begins to traverse the 2nd book

The 2nd book has a total of 1 properties

Property name: ID, property value: 2

The 2nd book has 9 sub nodes

Section name: Name, node value: Detective Conan

Section name: Author, node value: Qingshan Chang

Section name: Year, node value: 1996

Section Roll Name: page, node value: 5412

The writer : Dream lei @ Mailbox

copyright Notice unless noted, this article Yu Menglei original compilation

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