DOM4J parsing messages

Import Java.io.File;
Import Java.util.Iterator;
Import java.util.List;
Import Javax.xml.parsers.DocumentBuilder;
Import Javax.xml.parsers.DocumentBuilderFactory;
Import Org.dom4j.Attribute;
Import org.dom4j.Document;
Import org.dom4j.Element;
Import Org.dom4j.VisitorSupport;
Import Org.dom4j.io.DOMReader;

public class Dom4jtest {

public static void Main (string[] args) throws Exception {
Change to dom4j mode parsing
Domreader domreader=new Domreader ();
Building a Document object in the audience
Documentbuilderfactory factory=documentbuilderfactory.newinstance ();
Documentbuilder Db=factory.newdocumentbuilder ();
Getting document objects from the document builder
File File=new file ("Src/books.xml");
Org.w3c.dom.Document domdocument= db.parse (file);

Document Doc=domreader.read (domDocument);


Start Parsing Doc Object
Element root= doc.getrootelement ();

Get by ID
Element book1= Doc.elementbyid ("BH10001");
System.out.println (Book1.asxml ());

Gets the first child node of the current node
Element book= root.element ("book");
System.out.println (Book.asxml ());

List list= root.elements ();
for (Iterator it = List.iterator (); It.hasnext ();) {
element element = (Element) It.next ();
System.out.println (Element.asxml ());
}

List list2= root.elements ("book");
for (Iterator it = List2.iterator (); It.hasnext ();) {
element element = (Element) It.next ();
List list3=element.elements ("name");
System.out.println ((Element) list3.get (0)). Asxml ());

}
Element book2= (Element) root.elements (). get (1);
System.out.println (Book2.asxml ());
String Id=book2.attribute ("id"). getText ();
SYSTEM.OUT.PRINTLN (ID);
Querying XML nodes through the XPath path language
Element xbook2 = (Element) Root.selectsinglenode ("//book[1]");
System.out.println (Xbook2.asxml ());
Attribute xbook2id = (Attribute) root.selectsinglenode ("//book[1]/@id");
Element xbook2id = (Element) Root.selectsinglenode ("/books/book[2]/name");
System.out.println (Xbook2id.gettext ());

List listx=root.selectnodes ("/books/book");
for (Iterator it = Listx.iterator (); It.hasnext ();) {
element element = (Element) It.next ();
System.out.println (element.element ("name"). GetText ());
}
}

}

Message content:

<?xml version= "1.0" encoding= "Utf-8"?>
<books>
<book id= "BH10001" id= "BH10001" haha= "haha" >
<name>java Learning </name>
<price>100</price>
<author>itany</author>
</book>
<book id= "BH10002" >
<name>xml</name>
<price>200</price>
<author>itany</author>
</book>
<book id= "BH10003" >
<name>js</name>
<price>300</price>
<author>itany</author>
</book>
<book id= "BH10004" >
<name>jsp</name>
<price>400</price>
<author>itany</author>
</book>
<book id= "BH10005" >
<name>mysql</name>
<price>500</price>
<author>itany</author>
</book>
</books>

DOM4J parsing messages