Java / XML 파싱(parsing) , DocumentBuilderFactory, DocumentBuilder 이용하기

아래 XML 파일에서 tmx  tag의 데이터를 추출해보도록하겠습니다!

 

package Dom;

 

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.ArrayList;

import java.util.List;

 

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

 

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

 

public class DomThread extends Thread {

 

    // 다운로드 받은 문자열을 저장할 변수

    private String xml;

    // 파싱한 결과를 저장할 리스트 - 몇개인지 모르므로 배열이 아니고 ArrayList로 만들어야 합니다.

    List<String> data = new ArrayList<String>();

 

    public void run() {

 

        try {

            // 연결+옵션설정

            String addr = "http://www.kma.go.kr/weather/forecast/mid-term-xml.jsp?stnId=109";

            URL url = new URL(addr);

            HttpURLConnection http = (HttpURLConnection)url.openConnection();

            http.setConnectTimeout(10000);

            http.setUseCaches(false);

 

            // 위 부분 까지는 주소만 변경되고 모든 경우 동일

 

            // 위 주소에서 주는 데이터를 문자열로 읽기 위한 스트림 객체 생성

            BufferedReader br = new BufferedReader(new InputStreamReader(http.getInputStream()));

            StringBuilder sb = new StringBuilder();

            while (true) {

                String line = br.readLine();

                if (line == null)

                    break;

                sb.append(line);

            }

            xml = sb.toString();

            br.close();

            http.disconnect();

 

        } catch (Exception e) {

            System.out.println("다운로드에러" + e.getMessage());

 

        }

        // System.out.println(xml);

 

        // 파싱

        try {

            // 자신의 static 메서드를 가지고 객체를 생성 : 싱글톤 패턴

            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

            // 다른 클래스의 객체를 가지고, 객체를 생성하면 팩토리 패턴.

            DocumentBuilder documentbuilder = factory.newDocumentBuilder(); //// 팩토리 메서드 패턴  공장에서 찍어줌

            // 문자열을 InputStream으로 변환

            InputStream is = new ByteArrayInputStream(xml.getBytes());

            Document doc = documentbuilder.parse(is);

            // xml을 메모리에 펼쳐놓고 루트를 elemnt에 저장

            Element element = doc.getDocumentElement();

 

            // 파싱할 태그의 리스트를 찾아온다

            // tmx 태그 전체를 list에 저장

            NodeList list = element.getElementsByTagName("tmx");

            // 리스트를 순회하면서 데이터를 data에 추가

            for (int i = 0; i < list.getLength(); i++) {

                // i번째 tmx 태그를 node에 저장

                Node node = list.item(i);

                // 태그 내의 첫번째 값 앞으로 이동

                Node temp = node.getFirstChild();

                // 태그 내의 첫번째 값을 value에 저장

                String value = temp.getNodeValue();

                // 값을 data에 저장

                data.add(value);

 

            }

 

        } catch (Exception e) {

            System.out.println("파싱에러" + e.getMessage());

        }

 

        // data의 내용을 출력 - 단순 확인만 하는 경우

        // 컬렉션의 toString은 각 데이터의 toString을 다시 호출

        System.out.println(data);

 

        for(String imsi : data){

            System.out.println(imsi);

        }

    }

}

package Dom;

 

public class DomMian {

 

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        DomThread dom = new DomThread();

        dom.start();

    }

 

}

출처 : http://blog.naver.com/PostView.nhn?blogId=tkddlf4209&logNo=220486989575&parentCategoryNo=&categoryNo=&viewDate=&isShowPopularPosts=false&from=postView