SAX parser를 활용한 XML 파싱

<?xml version="1.0" encoding="UTF-8"?>
<People>
	<person>
		<age>30</age>
		<name>홍길동</name>
		<gender>Male</gender>
	</person>
	
	<person>
		<age>29</age>
		<name>김철수</name>
		<gender>Male</gender>
	</person>
	
	<person>
		<age>25</age>
		<name>김영희</name>
		<gender>Female</gender>
	</person>
	
	<person>
		<age>32</age>
		<name>김영심</name>
		<gender>Female</gender>
	</person>
</People>

위 내용은 C:\에 작성한 userList.xml파일의 내용이다.

 

package saxparse;

public class Person {

	private int age;
	private String name;
	private String gender;
	
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getGender() {
		return gender;
	}
	public void setGender(String gender) {
		this.gender = gender;
	}
	
	@Override
	public String toString() {
		return "Person [age=" + age + ", name=" + name + ", gender=" + gender + "]";
	}
}

PersonDto.java

 

package saxparse;

import java.util.ArrayList;
import java.util.List;

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

public class PeopleSaxHandler extends DefaultHandler {

	// 파싱한 사람객체를 넣을 리스트
	private List<PersonDto> personDtoList;
	
	// 파싱한 사람객체
	private PersonDto personDto;
	
	// character 메소드에서 자장할 문자열 변수
	private String str;
	
	public PeopleSaxHandler() {
		personDtoList = new ArrayList<PersonDto>();
	}
	
	@Override
	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

		// 시작 태그를 만났을 때 발생하는 이벤트
		if(qName.equals("person")) {
			
			personDto = new PersonDto();
			personDtoList.add(personDto);
		}
	}
	
	@Override
	public void endElement(String uri, String localName, String qName) throws SAXException {
		
		// 끝 태그를 만났을 때
		if(qName.equals("age")) personDto.setAge(Integer.parseInt(str));
		else if(qName.equals("name")) personDto.setName(str);
		else if(qName.equals("gender")) personDto.setGender(str);
	}
	
	@Override
	public void characters(char[] ch, int start, int length) throws SAXException {
		
		// 태그와 태그 사이의 내용을 처리
		str = new String(ch, start, length);
	}

	public List<PersonDto> getPersonDtoList() {
		return personDtoList;
	}

	public void setPersonDtoList(List<PersonDto> personDtoList) {
		this.personDtoList = personDtoList;
	}
}

 

위 코드는 xml의 태그를 만났을 때 처리할 메소드를 담은 클래스.

 

package saxparse;

import java.io.File;
import java.io.IOException;
import java.util.List;

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

import org.xml.sax.SAXException;

public class Main {

	public static void main(String[] args) {
		
		File file = new File("C:/userList.xml");
		
		SAXParserFactory factroy = SAXParserFactory.newInstance();
		
		try {
			SAXParser parser = factroy.newSAXParser();
			PeopleSaxHandler handler = new PeopleSaxHandler();
			
			parser.parse(file, handler);
			
			List<PersonDto> pList = handler.getPersonDtoList();
			
			for(PersonDto personDto : pList) {
				
				System.out.println("personDto : " + personDto.toString());
			}
			
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			
			e.printStackTrace();
		}
	}
}

 

실행

 

아래는 결과

 

 

출처:

sangwoo0727.github.io/java/JAVA-29_SAXParser/