Dom parsing using JAXP vs. xml

/*dom Analytic programming

• Traverse all nodes

• Find a node

• Delete Nodes

• Update Nodes

• Adding nodes

/*

PackageCn.itcast.jaxp;ImportJava.io.File;Importjava.io.IOException;ImportJavax.xml.parsers.DocumentBuilder;Importjavax.xml.parsers.DocumentBuilderFactory;Importjavax.xml.parsers.ParserConfigurationException;ImportJavax.xml.transform.Transformer;Importjavax.xml.transform.TransformerException;Importjavax.xml.transform.TransformerFactory;ImportJavax.xml.transform.dom.DOMSource;ImportJavax.xml.transform.stream.StreamResult;Importorg.junit.Test;Importorg.w3c.dom.Document;Importorg.w3c.dom.Element;ImportOrg.w3c.dom.Node;Importorg.w3c.dom.NodeList;Importorg.xml.sax.SAXException; Public classDemo1 {/**manipulating XML documents with JAXP *@paramargs *@throwsparserconfigurationexception *@throwsIOException *@throwssaxexception*/     Public Static voidMain (string[] args)throwsparserconfigurationexception, Saxexception, IOException {//1. Get the factoryDocumentbuilderfactory factory =documentbuilderfactory.newinstance (); //2. Generating the parserDocumentbuilder Builder =Factory.newdocumentbuilder (); //3. Parse the XML document and get the document that represents itDocument document = Builder.parse (NewFile ("Src/book1.xml")); //Traverselist (document); }        //get the value of the price junction@Test Public voidRead ()throwsexception{//1. Get the factoryDocumentbuilderfactory factory =documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book.xml")); NodeList List= document.getElementsByTagName ("Price"); Node Price= List.item (0); String value=price.gettextcontent ();    System.out.println (value); }        //Modify the value of the node:< price >39.00 yuan </price > change to 109@Test Public  voidUpdate ()throwsexception{documentbuilderfactory Factory=documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book1.xml")); Node Price= document.getElementsByTagName ("Price"). Item (0); Price.settextcontent ("109"); //write an in-memory document to an XML fileTransformerfactory tf =transformerfactory.newinstance (); //Get ConverterTransformer ts =Tf.newtransformer (); Ts.transform (NewDomsource (document),NewStreamresult (NewFile ("Src/book1.xml"))); }            //Add a child node to the specified node (the price node)@Test Public voidAdd ()throwsexception{documentbuilderfactory Factory=documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book1.xml")); //Create a node that needs to be increasedNode Price = document.createelement ("Prices"); Price.settextcontent ("59 Yuan"); //get the father who needs to increase the nodeNode parent = document.getElementsByTagName ("book"). Item (0); //hook up nodes that need to be added to the parent node.Parent.appendchild (price); Transformerfactory TF=transformerfactory.newinstance (); Transformer TS=Tf.newtransformer (); Ts.transform (NewDomsource (document),NewStreamresult (NewFile ("Src/book1.xml"))); }        //inserts a price node into the specified position@Test Public voidADD2 ()throwsexception{documentbuilderfactory Factory=documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book1.xml")); Node Node= Document.createelement ("Price"); Node.settextcontent ("39 Yuan"); Node Parent= document.getElementsByTagName ("book"). Item (0); Parent.insertbefore (node, document.getelementsbytagname ("title"). Item (0)); Transformerfactory TF=transformerfactory.newinstance (); Transformer TS=Tf.newtransformer (); Ts.transform (NewDomsource (document),NewStreamresult (NewFile ("Src/book1.xml"))); }        //Delete the price node of an XML document@Test Public voidDelete ()throwsexception{documentbuilderfactory Factory=documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book1.xml")); Node Node= document.getElementsByTagName ("Price"). Item (2);        Node.getparentnode (). removechild (node); Transformerfactory TF=transformerfactory.newinstance (); Transformer TS=Tf.newtransformer (); Ts.transform (NewDomsource (document),NewStreamresult (NewFile ("Src/book1.xml"))); }        //manipulating XML document Properties@Test Public voidUpdateattribute ()throwsexception{documentbuilderfactory Factory=documentbuilderfactory.newinstance (); Documentbuilder Builder=Factory.newdocumentbuilder (); Document Document= Builder.parse (NewFile ("Src/book1.xml")); //when manipulating elements of an XML document, the element is generally treated as a node object, but if the programmer finds that node is not good, it should turn node strong into the appropriate typeNode node = document.getelementsbytagname ("book"). Item (0); Element Book=NULL; if(Node.getnodetype () ==node.element_node) {//before you make a node transition, it's a good idea to first determine the node type .Book =(Element) node; } book.setattribute ("Name", "YYYYYYY"); Book.setattribute ("Password", "123"); Book.removeattribute ("Password"); Transformerfactory TF=transformerfactory.newinstance (); Transformer TS=Tf.newtransformer (); Ts.transform (NewDomsource (document),NewStreamresult (NewFile ("Src/book1.xml"))); }        //Traverse     Public Static voidList (node node) {if(Node.getnodetype () = =Node.element_node)        {System.out.println (Node.getnodename ()); } NodeList List=node.getchildnodes ();  for(intI=0;i<list.getlength (); i++) {Node child=List.item (i);        List (child); }    }    }

Dom parsing using JAXP vs. xml