Parsing XML in Java – (SAX Parser)

SAX Parser merupakan parsing xml yang lebih cepat dan less memory dari pada DOM Parser. Saya tahu SAX Parser pada saat menangani project Java di kantor. gak usah berbicara lama – lama, lets Begin…

1. XML File

Buat simple xml file

<?xml version="1.0"?>
<company>
 <staff>
 <firstname>yong</firstname>
 <lastname>mook kim</lastname>
 <nickname>mkyong</nickname>
 <salary>100000</salary>
 </staff>
 <staff>
 <firstname>low</firstname>
 <lastname>yin fong</lastname>
 <nickname>fong fong</nickname>
 <salary>200000</salary>
 </staff>
</company>

2. Java File

Gunakan SAX Parser untuk memparsing XML file

package com.yudi.sax;

import java.io.File;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class ReadXMLFile {

public static void main(String[] args) {
 try {

SAXParserFactory factory = SAXParserFactory.newInstance();
 SAXParser saxParser = factory.newSAXParser();

DefaultHandler handler = new DefaultHandler() {
 boolean bfname = false;
 boolean blname = false;
 boolean bnname = false;
 boolean bsalary = false;

@Override
 public void startElement(String uri, String localName,
 String qName, Attributes attributes)
 throws SAXException {
 // TODO Auto-generated method stub
 System.out.println("Start Element " + qName);

if (qName.equalsIgnoreCase("FIRSTNAME")) {
 bfname = true;
 }

if (qName.equalsIgnoreCase("LASTNAME")) {
 blname = true;
 }

if (qName.equalsIgnoreCase("NICKNAME")) {
 bnname = true;
 }

if (qName.equalsIgnoreCase("SALARY")) {
 bsalary = true;
 }

}

@Override
 public void endElement(String uri, String localName,
 String qName) throws SAXException {
 // TODO Auto-generated method stub
 System.out.println("End Element :" + qName);

}

@Override
 public void characters(char[] ch, int start, int length)
 throws SAXException {
 // TODO Auto-generated method stub
 if (bfname) {
 System.out.println("First Name : "
 + new String(ch, start, length));
 bfname = false;
 }

if (blname) {
 System.out.println("Last Name : "
 + new String(ch, start, length));
 blname = false;
 }

if (bnname) {
 System.out.println("Nick Name : "
 + new String(ch, start, length));
 bnname = false;
 }

if (bsalary) {
 System.out.println("Salary : "
 + new String(ch, start, length));
 bsalary = false;
 }
 }
 };

saxParser.parse(new File("/home/yudi/Desktop/tes.xml"), handler);
 } catch (Exception e) {
 // TODO: handle exception
 e.printStackTrace();

 }
 }
}

Result

Start Element :company
Start Element :staff
Start Element :firstname
First Name : yong
End Element :firstname
Start Element :lastname
Last Name : mook kim
End Element :lastname
Start Element :nickname
Nick Name : mkyong
End Element :nickname
Start Element :salary
Salary : 100000
End Element :salary
End Element :staff
Start Element :staff
Start Element :firstname
First Name : low
End Element :firstname
Start Element :lastname
Last Name : yin fong
End Element :lastname
Start Element :nickname
Nick Name : fong fong
End Element :nickname
Start Element :salary
Salary : 200000
End Element :salary
End Element :staff
End Element :company

Refference : Mkyong.com