Dom manipulating XML instances

The DTD is as follows:

<?XML version= "1.0" encoding= "UTF-8"?><!List of ELEMENT books (Computer books) *><!ELEMENT Computer Books (title, price) +, author +, Introduction, TEL,HR)><!ELEMENT title (#PCDATA)><!ELEMENT Price (#PCDATA)><!ELEMENT author (#PCDATA)><!ELEMENT Introduction (#PCDATA)><!ELEMENT Tel (#PCDATA)><!ELEMENT HR EMPTY><!attlist Author sex CDATA #IMPLIED age CDATA #IMPLIED Phone CDATA #REQUIRED Job CDATA #FIXED "Writer" hobby CDATA "Talking">

The XML is as follows:

<?XML version= "1.0" encoding= "UTF-8" standalone= "no"?><List of Books>    <Computer Books>        <title>Thinking in Java</title>        <Price>60</Price>        <title>Thinking in XX</title>        <Price>80</Price>        <Author Hobby= "Talking"Job= "Writer"Phone= "1212">Gdfd</author>        <Introduction>Java Bible</Introduction>        <Tel>13661955777</Tel>        <HR/>    </Computer Books>    <Computer Books>        <title>Thinking in C + +</title>        <Price>100</Price>        <Author age= " the"Hobby= "Talking"Job= "Writer"Phone= "1213">Qq</author>        <Introduction>C + + Bible</Introduction>        <Tel>13661955732</Tel>        <HR/>    </Computer Books>    <Computer Books>        <title>I Love C + +</title>        <Price>99</Price>        <Author age= "$"Hobby= "Talking"Job= "Writer"Phone= "139677">Hzz</author>        </Computer Books>    </List of Books>

The procedure is as follows:

 PackageCom.xml;ImportJavax.xml.*;ImportJavax.xml.parsers.DocumentBuilder;Importjavax.xml.parsers.DocumentBuilderFactory;Importjavax.xml.parsers.ParserConfigurationException;ImportJavax.xml.transform.Transformer;Importjavax.xml.transform.TransformerConfigurationException;Importjavax.xml.transform.TransformerFactory;ImportJavax.xml.transform.dom.DOMSource;ImportJavax.xml.transform.stream.StreamResult;Importorg.w3c.dom.*;ImportCom.sun.org.apache.xalan.internal.xsltc.cmdline.Transform; Public classDomxml {/**     * @paramargs *@throwsException*/     Public Static voidMain (string[] args)throwsException {//TODO auto-generated Method Stubdocumentbuilderfactory dbf=documentbuilderfactory.newinstance (); Documentbuilder DB=Dbf.newdocumentbuilder (); Document Document= Db.parse ("Webroot/newfile.xml"); //System.out.print (document);read (document);    Delete (document); }        //Delete book titled I love C + +     Public Static voidDelete (Document doc)throwsexception{NodeList nl= Doc.getelementsbytagname ("title"); Node N=NULL; Node P=NULL;  for(intI=0;i<nl.getlength (); i++){            if((N=nl.item (i)). Gettextcontent (). Equals ("I love C + +") ) {(P=N.getparentnode ()). Getparentnode (). removechild (P);  Break; }} transformerfactory TFF=transformerfactory.newinstance (); //by getting a converterTransformer tf =Tff.newtransformer (); Tf.transform (NewDomsource (DOC),NewStreamresult ("Webroot/newfile.xml")); }         Public Static voidAdd (Document doc)throwsexception{Element Newbook= Doc.createelement ("Computer book"); Element Newbook_name= Doc.createelement ("title"); Element Newbook_price= Doc.createelement ("Price"); Element Newbook_auth= Doc.createelement ("Author"); Newbook_name.settextcontent ("I Love C + +"); Newbook_price.settextcontent ("99"); Newbook_auth.settextcontent ("Hzz"); Newbook_auth.setattribute ("Phone", "139677"); Newbook_auth.setattribute ("Age", "44");        Newbook.appendchild (Newbook_name);        Newbook.appendchild (Newbook_price);                Newbook.appendchild (Newbook_auth); //Add new books to the list of booksdoc.getdocumentelement (). appendchild (Newbook); //Get TransformerfactoryTransformerfactory TFF =transformerfactory.newinstance (); //by getting a converterTransformer tf =Tff.newtransformer (); Tf.transform (NewDomsource (DOC),NewStreamresult ("Webroot/newfile.xml")); }         Public Static voidread (document document) {NodeList nl= document.getElementsByTagName ("Computer book"); Element e= (Element) nl.item (0); Element E2= (Element) e.getelementsbytagname ("Author"). Item (0); System.out.print (E2.gettextcontent ()+e2.getattribute ("Phone")); }         Public Static voidList (node node) {if(Node.getnodetype () = =node.        Element_node) System.out.println (Node.getnodename ()); ElseSystem.out.println (node.gettextcontent ()+node.getattributes ()); NodeList NL=node.getchildnodes ();  for(intI=0;i<nl.getlength (); i++) {Node n=Nl.item (i);        List (n); }    }}

Dom manipulating XML instances