Four ways to read XML files in Java

XML file:

XML code

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

The first method of DOM implementation:

Java code

Import Java.io.File; Import Javax.xml.parsers.DocumentBuilder; Import Javax.xml.parsers.DocumentBuilderFactory; Import org.w3c.dom.Document; Import org.w3c.dom.NodeList; public class Myxmlreader2dom { public static void Main (String arge[]) { Long lasting = System.currenttimemillis (); try { File F = new file ("Data_10k.xml"); Documentbuilderfactory factory = Documentbuilderfactory.newinstance (); Documentbuilder builder = Factory.newdocumentbuilder (); Document doc = Builder.parse (f); NodeList nl = doc.getelementsbytagname ("VALUE"); for (int i = 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"); } } } catch (Exception e) { E.printstacktrace (); } } }

The second, DOM4J implementation method:

Java code

Import java.io.*; Import java.util.*; Import org.dom4j.*; Import org.dom4j.io.*; public class Myxmlreader2dom4j { public static void Main (String arge[]) { Long lasting = System.currenttimemillis (); try { File F = new file ("Data_10k.xml"); Saxreader reader = new Saxreader (); Document doc = Reader.read (f); Element root = Doc.getrootelement (); Element foo; for (Iterator i = root.elementiterator ("VALUE"); I.hasnext ();) { Foo = (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"); } } catch (Exception e) { E.printstacktrace (); } } }

The third method of jdom implementation:

Java code

Import java.io.*; Import java.util.*; Import org.jdom.*; Import org.jdom.input.*; public class Myxmlreader2jdom { public static void Main (String arge[]) { Long lasting = System.currenttimemillis (); try { Saxbuilder builder = new Saxbuilder (); Document doc = builder.build (new File ("Data_10k.xml")); Element foo = doc.getrootelement (); List Allchildren = Foo.getchildren (); for (int i = 0; i < allchildren.size (); i++) { System.out.print ("License plate Number:" + (Element) allchildren.get (i)). Getchild ("NO"). GetText ()); System.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 (); } } }

The fourth method of sax implementation:

Java code

　

Import Javax.xml.parsers.SAXParser; Import Javax.xml.parsers.SAXParserFactory; Import org.xml.sax.Attributes; Import Org.xml.sax.InputSource; Import org.xml.sax.SAXException; Import Org.xml.sax.helpers.DefaultHandler; public class Myxmlreader2sax extends DefaultHandler { Java.util.Stack tags = new java.util.Stack (); Public Myxmlreader2sax () { Super (); } public static void Main (String args[]) { Long lasting = System.currenttimemillis (); try { SAXParserFactory SF = Saxparserfactory.newinstance (); SAXParser sp = Sf.newsaxparser (); Myxmlreader2sax reader = new Myxmlreader2sax (); Sp.parse (New InputSource ("Data_10k.xml"), reader); } catch (Exception e) { E.printstacktrace (); } System.out.println ("Run Time:" + (System.currenttimemillis ()-lasting) + "milliseconds"); } public void characters (char ch[], int start, int length) Throws Saxexception { String tag = (string) tags.peek (); if (Tag.equals ("NO")) { System.out.print ("License plate number:" + New String (CH, start, length)); } if (Tag.equals ("ADDR")) { SYSTEM.OUT.PRINTLN ("Address:" + New String (CH, start, length)); } } public void Startelement (string uri, String localname, String qName, Attributes attrs) { Tags.push (QName); } }

Four ways to read XML files in Java