Four ways to read XML files----java

XML file:

XML code

 　　 <?XML version= "1.0" encoding= "GB2312"?>   　　 <RESULT>  　　 <VALUE>  　　 <NO>A1234</NO>  　　 <ADDR>Zhengzhou City, Henan Province</ADDR>  　　 </VALUE>  　　 <VALUE>  　　 <NO>B1234</NO>  　　 <ADDR>Erqi District, Zhengzhou city, Henan Province</ADDR>  　　 </VALUE>  　　 </RESULT>

The first method of DOM implementation:

Java code

1 　 ImportJava.io.File;2 　　 ImportJavax.xml.parsers.DocumentBuilder;3 　　 Importjavax.xml.parsers.DocumentBuilderFactory;4 　　 Importorg.w3c.dom.Document;5 　　 Importorg.w3c.dom.NodeList;6 　　 Public classMyxmlreader2dom {7 　　 Public Static voidMain (String arge[]) {8 　　 LongLasting =System.currenttimemillis ();9 　　 Try { TenFile f =NewFile ("Data_10k.xml"); OneDocumentbuilderfactory factory =documentbuilderfactory.newinstance (); ADocumentbuilder Builder =Factory.newdocumentbuilder (); -Document doc =Builder.parse (f); -NodeList nl = doc.getelementsbytagname ("VALUE"); the 　　 for(inti = 0; I < nl.getlength (); i++) { -System.out.print ("License plate number:" + doc.getelementsbytagname ("NO")). Item (i). Getfirstchild (). Getnodevalue ()); -System.out.println ("Owner's address:" + doc.getelementsbytagname ("ADDR")). Item (i). Getfirstchild (). Getnodevalue ()); -System.out.println ("Run Time:" + (System.currenttimemillis ()-lasting) ++ "milliseconds"); - } + } A}Catch(Exception e) { at e.printstacktrace (); - } - } -}

The second, DOM4J implementation method:

Java code

1 ImportJava.io.*; 2 　　 ImportJava.util.*; 3 　　 Importorg.dom4j.*; 4 　　 ImportOrg.dom4j.io.*; 5 　　 Public classmyxmlreader2dom4j {6 　　 Public Static voidMain (String arge[]) {7 　　 LongLasting =System.currenttimemillis ();8 　　 Try { 9File f =NewFile ("Data_10k.xml"); TenSaxreader reader =NewSaxreader (); OneDocument doc =Reader.read (f); AElement root =doc.getrootelement (); - Element foo; - 　　 for(Iterator i = root.elementiterator ("VALUE")); I.hasnext ();) { theFoo =(Element) I.next (); -System.out.print ("License plate number:" + foo.elementtext ("NO"))); -System.out.println ("Owner's address:" + foo.elementtext ("ADDR"))); - } +System.out.println ("Run Time:" + (System.currenttimemillis ()-lasting) -+ "milliseconds"); + } A}Catch(Exception e) { at e.printstacktrace (); - } - } -}

The third method of jdom implementation:

Java code

1 　 ImportJava.io.*; 2 　　 ImportJava.util.*; 3 　　 Importorg.jdom.*; 4 　　 Importorg.jdom.input.*; 5 　　 Public classMyxmlreader2jdom {6 　　 Public Static voidMain (String arge[]) {7 　　 LongLasting =System.currenttimemillis ();8 　　 Try { 9Saxbuilder Builder =NewSaxbuilder ();TenDocument doc = Builder.build (NewFile ("Data_10k.xml")); OneElement foo =doc.getrootelement (); AList Allchildren =Foo.getchildren (); - 　　 for(inti = 0; I < allchildren.size (); i++) { -System.out.print ("License plate Number:" + (Element) allchildren.get (i)). Getchild ("NO"). GetText ()); theSystem.out.println ("Owner's Address:" + (Element) allchildren.get (i)). Getchild ("ADDR"). GetText ()); - } -System.out.println ("Run Time:" + (System.currenttimemillis ()-lasting) -+ "milliseconds"); + } -}Catch(Exception e) { + e.printstacktrace (); A } at } -}

The fourth method of sax implementation:

Java code

　

1 　 ImportJavax.xml.parsers.SAXParser;2 　　 Importjavax.xml.parsers.SAXParserFactory;3 　　 Importorg.xml.sax.Attributes;4 　　 ImportOrg.xml.sax.InputSource;5 　　 Importorg.xml.sax.SAXException;6 　　 ImportOrg.xml.sax.helpers.DefaultHandler;7 　　 Public classMyxmlreader2saxextendsDefaultHandler {8Java.util.Stack tags =NewJava.util.Stack ();9 　　 PublicMyxmlreader2sax () {Ten 　　 Super(); One } A 　　 Public Static voidMain (String args[]) { - 　　 LongLasting =System.currenttimemillis (); - 　　 Try { theSAXParserFactory SF =saxparserfactory.newinstance (); -SAXParser SP =Sf.newsaxparser (); -Myxmlreader2sax reader =NewMyxmlreader2sax (); -Sp.parse (NewInputSource ("Data_10k.xml"), reader); +}Catch(Exception e) { - e.printstacktrace (); + } ASystem.out.println ("Run Time:" + (System.currenttimemillis ()-lasting) at+ "milliseconds"); - } - 　　 Public voidCharacters (CharCh[],intStartintlength) - 　　 throwssaxexception { -String tag =(String) Tags.peek (); - 　　 if(Tag.equals ("NO")) { inSystem.out.print ("License plate number:" +NewString (CH, start, length)); - } to 　　 if(Tag.equals ("ADDR")) { +SYSTEM.OUT.PRINTLN ("Address:" +NewString (CH, start, length)); - } the } * 　　 Public voidstartelement (String uri, String localname, String qName, $ Attributes attrs) { Panax Notoginseng Tags.push (qName); - } the}

Four ways to read XML files----Java