공공데이터 포털
국가에서 보유하고 있는 다양한 데이터를『공공데이터의 제공 및 이용 활성화에 관한 법률(제11956호)』에 따라 개방하여 국민들이 보다 쉽고 용이하게 공유•활용할 수 있도록 공공데이터(Datase
www.data.go.kr
순서
1. 회원가입 및 로그인
2. 데이터 찾기 > 데이터 목록 > 오픈API
3. 원하는 문서를 선택해서 활용신청한다.
4. 미리보기를 통해 코드를 확인할 수 있다.
5. 마이페이지에서 API 신청이 완료되었는지 확인하고 원하는 샘플 코드를 선택한다.
package ch01;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
public class APIExplorer {
public static void main(String[] args) throws IOException {
// 순수 자바코드로 (클라이언트 측 코딩)
// 준비물
// 1. 서버측 주소 - 경로
// http://localhost:8080/test?name=홍길동&age=20
// http://localhost:8080/test?name=%ED%99%8D%EA%B8%B8%EB%8F%99&age=20
StringBuilder urlBuilder = new StringBuilder(
"http://apis.data.go.kr/B552584/UlfptcaAlarmInqireSvc/getUlfptcaAlarmInfo");
urlBuilder.append("?" + URLEncoder.encode("serviceKey", "UTF-8")
+ "=WgX%2BCwI5hUgsT8ZfOiM5ekr2ywuOBgOArK1kBNwFf9sV%2BKHU9z4H41HvUFr0QZ2b1MRSE7SCfShQDIcp6YvlVg%3D%3D"); /*
*/
urlBuilder.append("&" + URLEncoder.encode("returnType", "UTF-8") + "="
+ URLEncoder.encode("json", "UTF-8")); /* xml 또는 json */
urlBuilder.append("&" + URLEncoder.encode("numOfRows", "UTF-8") + "="
+ URLEncoder.encode("100", "UTF-8")); /* 한 페이지 결과 수 */
urlBuilder
.append("&" + URLEncoder.encode("pageNo", "UTF-8") + "=" + URLEncoder.encode("1", "UTF-8")); /* 페이지번호 */
urlBuilder.append(
"&" + URLEncoder.encode("year", "UTF-8") + "=" + URLEncoder.encode("2024", "UTF-8")); /* 측정 연도 */
urlBuilder.append("&" + URLEncoder.encode("itemCode", "UTF-8") + "="
+ URLEncoder.encode("PM10", "UTF-8")); /* 미세먼지 항목 구분(PM10, PM25), PM10/PM25 모두 조회할 경우 파라미터 생략 */
// URL 객체에서 문자열 경로 넣어서 객체 생성
// url.openConnection() 데이터 요청 보내기 - 설정하고
URL url = new URL(urlBuilder.toString());
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET"); // 서버에게 자원 요청
conn.setRequestProperty("Content-type", "application/json");
// 성공하면 보통 200, 실패 404,405
System.out.println("Response code: " + conn.getResponseCode());
// 100번대부터 500번대까지 의미가 있다 = 약속
BufferedReader rd;
if (conn.getResponseCode() >= 200 && conn.getResponseCode() <= 300) {
rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
} else {
rd = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
}
StringBuilder sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
conn.disconnect();
System.out.println(sb.toString());
} // end of main
} // end of class
실행결과
올바르게 입력되었다는 Response : 200과 함께 데이터를 입력한 형태(현재는 json)로 가져온 것을 확인할 수 있다.
Response code: 200
{"response":{"body":{"totalCount":282,"items":[{"clearVal":"81","sn":"343","districtName":"전남","dataDate":"2024-05-12","issueVal":"202","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"중부권","clearTime":"16:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"98","sn":"355","districtName":"충남","dataDate":"2024-05-12","issueVal":"179","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"북부권역","clearTime":"18:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"313","sn":"338","districtName":"대구","dataDate":"2024-05-12","issueVal":"263","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"군위권역","clearTime":"12:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"93","sn":"352","districtName":"경남","dataDate":"2024-05-12","issueVal":"197","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"밀양권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"97","sn":"346","districtName":"제주","dataDate":"2024-05-12","issueVal":"187","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"제주권역","clearTime":"19:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"358","districtName":"경북","dataDate":"2024-05-12","issueVal":"169","issueTime":"13:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"동부권역","clearTime":"19:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"98","sn":"341","districtName":"경남","dataDate":"2024-05-12","issueVal":"181","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"창녕권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"90","sn":"360","districtName":"경남","dataDate":"2024-05-12","issueVal":"185","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"함안권역","clearTime":"19:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"96","sn":"356","districtName":"대전","dataDate":"2024-05-12","issueVal":"197","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"서부권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"89","sn":"335","districtName":"광주","dataDate":"2024-05-12","issueVal":"187","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"광주권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"347","districtName":"강원","dataDate":"2024-05-12","issueVal":"173","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"영서남부","clearTime":"14:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"336","districtName":"전북","dataDate":"2024-05-12","issueVal":"241","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"동부권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"345","districtName":"전북","dataDate":"2024-05-12","issueVal":"186","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"서부권역","clearTime":"18:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"99","sn":"361","districtName":"경남","dataDate":"2024-05-12","issueVal":"175","issueTime":"14:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"합천권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"90","sn":"340","districtName":"강원","dataDate":"2024-05-12","issueVal":"176","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"영동남부","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"99","sn":"357","districtName":"대구","dataDate":"2024-05-12","issueVal":"313","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"군위권역","clearTime":"16:00","issueGbn":"경보","itemCode":"PM10"},{"clearVal":"85","sn":"363","districtName":"경남","dataDate":"2024-05-12","issueVal":"222","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"함양권역","clearTime":"19:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"91","sn":"353","districtName":"세종","dataDate":"2024-05-12","issueVal":"190","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"세종권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"84","sn":"349","districtName":"인천","dataDate":"2024-05-12","issueVal":"151","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"영종·영흥권역","clearTime":"16:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"339","districtName":"전남","dataDate":"2024-05-12","issueVal":"222","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"서부권","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"85","sn":"362","districtName":"경남","dataDate":"2024-05-12","issueVal":"163","issueTime":"16:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"창원권역","clearTime":"20:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"98","sn":"332","districtName":"강원","dataDate":"2024-05-12","issueVal":"248","issueTime":"06:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"영동북부","clearTime":"12:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"88","sn":"337","districtName":"대구","dataDate":"2024-05-12","issueVal":"248","issueTime":"10:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"대구권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"96","sn":"350","districtName":"충북","dataDate":"2024-05-12","issueVal":"204","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"중부권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"92","sn":"351","districtName":"충북","dataDate":"2024-05-12","issueVal":"258","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"남부권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"61","sn":"359","districtName":"경북","dataDate":"2024-05-12","issueVal":"182","issueTime":"14:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"울릉권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"89","sn":"348","districtName":"충북","dataDate":"2024-05-12","issueVal":"200","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"북부권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"92","sn":"342","districtName":"충남","dataDate":"2024-05-12","issueVal":"201","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"동남부권역","clearTime":"15:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"83","sn":"354","districtName":"대전","dataDate":"2024-05-12","issueVal":"206","issueTime":"12:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"동부권역","clearTime":"16:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"99","sn":"334","districtName":"경북","dataDate":"2024-05-12","issueVal":"196","issueTime":"09:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"서부권역","clearTime":"17:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"82","sn":"344","districtName":"전북","dataDate":"2024-05-12","issueVal":"250","issueTime":"11:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"중부권역","clearTime":"16:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"93","sn":"333","districtName":"경남","dataDate":"2024-05-12","issueVal":"190","issueTime":"09:00","clearDate":"2024-05-12","issueDate":"2024-05-12","moveName":"거창권역","clearTime":"16:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"97","sn":"330","districtName":"경북","dataDate":"2024-04-20","issueVal":"165","issueTime":"06:00","clearDate":"2024-04-21","issueDate":"2024-04-20","moveName":"울릉권역","clearTime":"01:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"321","districtName":"경남","dataDate":"2024-04-19","issueVal":"136","issueTime":"14:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"양산권역","clearTime":"02:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"86","sn":"315","districtName":"경북","dataDate":"2024-04-19","issueVal":"140","issueTime":"10:00","clearDate":"2024-04-19","issueDate":"2024-04-19","moveName":"동부권역","clearTime":"12:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"94","sn":"316","districtName":"경남","dataDate":"2024-04-19","issueVal":"137","issueTime":"12:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"김해권역","clearTime":"00:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"96","sn":"326","districtName":"부산","dataDate":"2024-04-19","issueVal":"148","issueTime":"20:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"남부권역","clearTime":"05:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"95","sn":"320","districtName":"부산","dataDate":"2024-04-19","issueVal":"146","issueTime":"13:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"동부권역","clearTime":"01:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"97","sn":"319","districtName":"경남","dataDate":"2024-04-19","issueVal":"137","issueTime":"13:00","clearDate":"2024-04-19","issueDate":"2024-04-19","moveName":"고성권역","clearTime":"22:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"77","sn":"329","districtName":"경북","dataDate":"2024-04-19","issueVal":"148","issueTime":"15:00","clearDate":"2024-04-19","issueDate":"2024-04-19","moveName":"울릉권역","clearTime":"22:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"98","sn":"327","districtName":"부산","dataDate":"2024-04-19","issueVal":"144","issueTime":"21:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"서부권역","clearTime":"05:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"94","sn":"325","districtName":"경남","dataDate":"2024-04-19","issueVal":"144","issueTime":"18:00","clearDate":"2024-04-20","issueDate":"2024-04-19","moveName":"통영권역","clearTime":"04:00","issueGbn":"주의보","itemCode":"PM10"},{"clearVal":"93","sn":"314","districtName":"강원","dataDate":"2024-04-19","issueVal":"129","issueTime":"01:00","clearDate":"2024-04-19","issueDate":"2024-04-19","moveN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공부
package personal_study;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
public class APIExplorer {
public static void main(String[] args) throws IOException {
// 1. URL을 만들기 위한 StringBuilder
StringBuilder urlBuilder = new StringBuilder(
"http://apis.data.go.kr/1360000/FmlandWthrInfoService/getDayStatistics"); /* URL */
// 2. 오픈 API의요청 규격에 맞는 파라미터 생성, 발급받은 인증키.
urlBuilder.append("?" + URLEncoder.encode("serviceKey", "UTF-8") + "=서비스키"); /* Service Key */
urlBuilder
.append("&" + URLEncoder.encode("pageNo", "UTF-8") + "=" + URLEncoder.encode("1", "UTF-8")); /* 페이지번호 */
urlBuilder.append("&" + URLEncoder.encode("numOfRows", "UTF-8") + "="
+ URLEncoder.encode("10", "UTF-8")); /* 한 페이지 결과 수 */
urlBuilder.append("&" + URLEncoder.encode("dataType", "UTF-8") + "="
+ URLEncoder.encode("XML", "UTF-8")); /* 요청자료형식(XML/JSON) */
urlBuilder.append("&" + URLEncoder.encode("ST_YMD", "UTF-8") + "="
+ URLEncoder.encode("20161201", "UTF-8")); /* 일통계 시작 날짜(YYYYMMDD) */
urlBuilder.append("&" + URLEncoder.encode("ED_YMD", "UTF-8") + "="
+ URLEncoder.encode("20161201", "UTF-8")); /* 일통계 종료 날짜(YYYYMMDD) */
urlBuilder.append("&" + URLEncoder.encode("AREA_ID", "UTF-8") + "="
+ URLEncoder.encode("4122000000", "UTF-8")); /* 지역 아이디(활용가이드 하단첨부 참고) */
urlBuilder.append("&" + URLEncoder.encode("PA_CROP_SPE_ID", "UTF-8") + "="
+ URLEncoder.encode("PA130201", "UTF-8")); /* 주산지 작물별 특성 아이디(활용가이드 하단첨부 참고) */
// 3. URL 객체 생성.
URL url = new URL(urlBuilder.toString());
// 4. 요청하고자 하는 URL과 통신하기 위한 Connection 객체 생성.
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
// 5. 통신을 위한 메소드 SET.
conn.setRequestMethod("GET");
// 6. 통신을 위한 Content-type SET.
conn.setRequestProperty("Content-type", "application/json");
// 7. 통신 응답 코드 확인.
System.out.println("Response code: " + conn.getResponseCode());
// 8. 전달받은 데이터를 BufferedReader 객체로 저장.
BufferedReader rd;
if (conn.getResponseCode() >= 200 && conn.getResponseCode() <= 300) {
rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
} else {
rd = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
}
// 9. 저장된 데이터를 라인별로 읽어 StringBuilder 객체로 저장.
StringBuilder sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
// 10. 객체 해제.
rd.close();
conn.disconnect();
// 11. 전달받은 데이터 확인.
System.out.println(sb.toString());
} // end of main
} // end of class'Java' 카테고리의 다른 글
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