알면 편리한 SAX Parser

모르면 DOM 파서 쓰던가... ㅋㅋㅋ

우선 필요한 xml을 준비하자.

1. phonebook.xml

<?xml version="1.0" encoding="UTF-8" ?> <Phonebook> <PhonebookEntry> <firstname>John</firstname> <lastname>Connor</lastname> <Address>5,Downing Street</Address> <Phone loc="home">9875674567</Phone> <Phone loc="work">9875674567</Phone> <Phone loc="mobile">78654562341</Phone> </PhonebookEntry> <PhonebookEntry> <firstname>Peter</firstname> <lastname>Roche</lastname> <Address>6,Downing Street</Address> <Phone loc="home">7814567890</Phone> <Phone loc="work">76890556783</Phone> <Phone loc="mobile">4562227890</Phone> </PhonebookEntry> </Phonebook>

2. PhoneBook.java

package com.tazz; import org.apache.commons.lang.builder.ToStringBuilder; public class PhoneBook { private String firstname = ""; private String lastname = ""; private String Address = ""; private String homephone = ""; private String workphone = ""; private String mobilephone = ""; public String getFirstname() { return firstname; } public void setFirstname(String firstname) { this.firstname = firstname; } public String getLastname() { return lastname; } public void setLastname(String lastname) { this.lastname = lastname; } public String getAddress() { return Address; } public void setAddress(String address) { Address = address; } public String getHomephone() { return homephone; } public void setHomephone(String homephone) { this.homephone = homephone; } public String getWorkphone() { return workphone; } public void setWorkphone(String workphone) { this.workphone = workphone; } public String getMobilephone() { return mobilephone; } public void setMobilephone(String mobilephone) { this.mobilephone = mobilephone; } @Override public String toString() { return ToStringBuilder.reflectionToString(this); } }

3. ExampleHandler.java

package com.tazz; import java.util.ArrayList; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class ExampleHandler extends DefaultHandler { // =========================================================== // Fields // =========================================================== private String position = ""; private PhoneBook phoneBook; private ArrayList<PhoneBook> list; // =========================================================== // Getter & Setter // =========================================================== public ArrayList<PhoneBook> getParsedData() { return this.list; } // =========================================================== // Methods // =========================================================== @Override public void startDocument() throws SAXException { this.list = new ArrayList<PhoneBook>(); } @Override public void endDocument() throws SAXException { // Nothing to do } @Override public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { System.out.println(namespaceURI); System.out.println(localName); System.out.println(qName); if (qName.equals("PhonebookEntry")) { phoneBook = new PhoneBook(); } else if (qName.equals("firstname")) { position = "firstname"; } else if (qName.equals("lastname")) { position = "lastname"; } else if (qName.equals("Address")) { position = "Address"; } else if (qName.equals("Phone")) { String attValue = atts.getValue("loc"); if (attValue.equals("home")) { position = attValue; } else if (attValue.equals("work")) { position = attValue; } else if (attValue.equals("mobile")) { position = attValue; } } } @Override public void endElement(String namespaceURI, String localName, String qName) throws SAXException { System.out.println(namespaceURI); System.out.println(localName); System.out.println(qName); if (qName.equals("PhonebookEntry")) { list.add(phoneBook); } } @Override public void characters(char ch[], int start, int length) { System.out.println("characters"); if (position.equals("firstname")) { phoneBook.setFirstname((new String(ch, start, length)).trim()); position = ""; } if (position.equals("lasname")) { phoneBook.setLastname((new String(ch, start, length)).trim()); position = ""; } if (position.equals("Address")) { phoneBook.setAddress((new String(ch, start, length)).trim()); position = ""; } if (position.equals("home")) { phoneBook.setHomephone((new String(ch, start, length)).trim()); position = ""; } if (position.equals("work")) { phoneBook.setWorkphone((new String(ch, start, length)).trim()); position = ""; } if (position.equals("mobile")) { phoneBook.setMobilephone((new String(ch, start, length)).trim()); position = ""; } } }

4. ParsingXML.java

import java.io.File; import java.io.FileInputStream; import java.util.ArrayList; import java.util.Iterator; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.apache.commons.io.FileUtils; import org.xml.sax.InputSource; import org.xml.sax.XMLReader; import com.tazz.ExampleHandler; import com.tazz.PhoneBook; public class PaseingXML { /** * @param args */ public static void main(String[] args) { try { /* URL url = new URL( "http://www.anddev.org/images/tut/basic/parsingxml/example.xml"); System.out.println(IOUtils.toString(url.openStream())); */ File file = new File("D:\\GalileoForHtml\\workspace\\tazz.com\\SaxParserTest\\phonebook.xml"); System.out.println(FileUtils.readLines(file, "UTF-8")); /* Get a SAXParser from the SAXPArserFactory. */ SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser(); /* Get the XMLReader of the SAXParser we created. */ XMLReader xr = sp.getXMLReader(); /* Create a new ContentHandler and apply it to the XML-Reader */ ExampleHandler myExampleHandler = new ExampleHandler(); xr.setContentHandler(myExampleHandler); /* Parse the xml-data from our URL. */ xr.parse(new InputSource(new FileInputStream(file))); /* Parsing has finished. */ /* Our ExampleHandler now provides the parsed data to us. */ ArrayList<PhoneBook> list = myExampleHandler .getParsedData(); for (Iterator<PhoneBook> iterator = list.iterator(); iterator.hasNext();) { PhoneBook phoneBook = (PhoneBook) iterator.next(); System.out.println(phoneBook.toString()); } } catch (Exception e) { e.printStackTrace(); } } }

정말 알면 상당히 편하게 파싱할 수 있다. 모르면 DOM파서 그냥 쓰면 된다.

DOM파서보다는 SAX파서가 빠르다는 데 개발자의 취향에 따라 ...