공공데이터 Open API 활용하기

#1 API가 제공하는 XML문서를 파싱하여 사용한다.

 

#2 제공되는 XML은 다음과 같다.

 

#3 먼저 console에서 확인해보기 위한 코드이다.

 

package com.myproject.myapi; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.List; public class apitest {     public static void main(String[] args) {         // 지역코드 List에 담기         List<String> regId = new ArrayList<String>();         String strid = "11B10101@" + "11B20201@" + "11B20601@" + "11B20605@" + "11B20602@" + "11B10103@" + "11B10102@"                 + "11B20606@" + "11B20603@" + "11B20609@" + "11B20612@" + "11B20610@" + "11B20611@" + "11B20604@"                 + "11B20503@" + "11B20501@" + "11B20502@" + "11B20504@" + "11B20701@" + "11B20703@" + "11B20702@"                 + "11B20301@" + "11B20302@" + "11B20305@" + "11B20304@" + "11B20401@" + "11B20402@" + "11B20403@"                 + "11B20404@" + "11B20101@" + "11B20102@" + "11B20202@" + "11B20204@" + "11B20203@" + "11A00101@"                 + "11H20201@" + "11H20101@" + "11H20304@" + "11H20102@" + "11H20301@" + "11H20601@" + "11H20603@"                 + "11H20604@" + "11H20602@" + "11H20701@" + "11H20704@" + "11H20402@" + "11H20502@" + "11H20503@"                 + "11H20703@" + "11H20501@" + "11H20401@" + "11H20403@" + "11H20404@" + "11H20405@" + "11H10701@"                 + "11H10702@" + "11H10703@" + "11H10704@" + "11H10705@" + "11H10601@" + "11H10602@" + "11H10603@"                 + "11H10604@" + "11H10605@" + "11H10501@" + "11H10502@" + "11H10503@" + "11H10302@" + "11H10301@"                 + "11H10303@" + "11H10401@" + "11H10402@" + "11H10403@" + "11H10101@" + "11H10102@" + "11H10201@"                 + "11H10202@" + "1.10E+102@" + "1.10E+103@" + "11F20501@" + "11F20503@" + "11F20502@" + "11F20504@"                 + "11F20505@" + "21F20102@" + "21F20101@" + "21F20801@" + "21F20804@" + "21F20802@" + "21F20201@"                 + "21F20803@" + "11F20701@" + "11F20603@" + "11F20405@" + "11F20402@" + "11F20601@" + "11F20602@"                 + "11F20301@" + "11F20303@" + "11F20304@" + "11F20302@" + "11F20401@" + "11F20403@" + "11F20404@"                 + "11F10201@" + "11F10202@" + "21F10501@" + "11F10203@" + "21F10502@" + "11F10401@" + "21F10601@"                 + "11F10302@" + "21F10602@" + "11F10403@" + "11F10204@" + "11F10402@" + "11F10301@" + "11F10303@"                 + "11C20401@" + "11C20404@" + "11C20402@" + "11C20602@" + "11C20403@" + "11C20601@" + "11C20301@"                 + "11C20302@" + "11C20303@" + "11C20101@" + "11C20102@" + "11C20103@" + "11C20104@" + "11C20201@"                 + "11C20202@" + "11C20502@" + "11C20501@" + "11C10301@" + "11C10304@" + "11C10303@" + "11C10102@"                 + "11C10101@" + "11C10103@" + "11C10201@" + "11C10202@" + "11C10302@" + "11C10403@" + "11C10402@"                 + "11C10401@" + "11D10101@" + "11D10102@" + "11D10201@" + "11D10202@" + "11D10301@" + "11D10302@"                 + "11D10401@" + "11D10402@" + "11D10501@" + "11D10502@" + "11D10503@" + "11D20201@" + "11D20401@"                 + "11D20402@" + "11D20403@" + "11D20501@" + "11D20601@" + "11D20602@" + "11D20301@" + "11G00201@"                 + "11G00401@" + "11G00101@" + "11G00501@" + "11G00302@" + "11G00601@" + "11G00800@" + "12F00200@"                 + "12F00100@" + "12B20100@" + "12B20200@" + "12B10100@" + "12D00000@" + "1.20E+01@" + "12C10100@"                 + "12C10201@" + "12C10202@" + "12C30100@" + "12C30200@" + "12C20100@" + "12C20200@" + "12A30100@"                 + "12A30201@" + "12A30202@" + "12A10100@" + "12A10200@" + "12A20200@" + "12A20100@" + "12G00000@"                 + "12B10400@" + "12B10300@" + "12A20102@" + "12A20101@" + "12B20103@" + "12C10101@" + "12B20102@"                 + "12B20101@" + "12B20104@" + "12C10102@" + "12C10103@" + "22A30103@" + "22A30104@" + "22A30105@"                 + "12B10101@" + "12B10102@" + "22A30101@" + "22A30102@" + "12A20103@" + "12A20104@" + "12C20103@"                 + "12C20102@" + "12C20101@" + "12B10302@" + "12B10303@" + "12B10301@" + "12B10304@" + "12B10201@"                 + "12B10202@";         String[] strid2 = strid.split("@");         for (int i = 0; i < strid2.length; i++) {             regId.add(strid2[i]);         }         BufferedReader br = null;         String serviceKey = "인증키";         for (int k = 0; k < regId.size(); k++) {             String urlstr = "http://newsky2.kma.go.kr/service/ForecastZoneInfoService/ForecastZoneCodeDataInfo?"                     + "regId=" + regId.get(k) // 구역 코드                     + "&" + "pageNo=1" // 페이지 수                     + "&numOfRows=1" + "&" + "ServiceKey=" + serviceKey;             try {                 URL url = new URL(urlstr);                 HttpURLConnection urlconnection = (HttpURLConnection) url.openConnection();                 urlconnection.setRequestMethod("GET");                 br = new BufferedReader(new InputStreamReader(urlconnection.getInputStream(), "UTF-8"));                 String result = "";                 String line;                 while ((line = br.readLine()) != null) {                     result = result + line + "\n";                 } // while                 System.out.println(result);             } catch (Exception e) {                 System.out.println(e.getMessage());             } // catch         }     }// main }

#4 XML을 파싱하여 사용해보자

package com.myproject.myapi;   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 xmlParing {     //item 정보를 가져오는 메소드      private static String getTagValue(String tag, Element ele) {         NodeList nodeList = ele.getElementsByTagName(tag).item(0).getChildNodes();         Node nValue = (Node) nodeList.item(0);         if(nValue == null) {             return null;         }         return nValue.getNodeValue();     }// getTagValue          public static void main(String[] args) {         String serviceKey = "인증키";         int page =1; //페이지 초기값         try {             while(true) {                 //parsing할 url 지정                  String url = "http://newsky2.kma.go.kr/service/ForecastZoneInfoService/ForecastZoneCodeDataInfo?"                         + "regId=11B10101"  // 구역 코드                         + "&" + "pageNo="+page // 페이지 수                         + "&numOfRows=1" + "&" + "ServiceKey=" + serviceKey;                 DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();                 DocumentBuilder dBuilder  = dbFactory.newDocumentBuilder();                 Document doc = dBuilder.parse(url);                                   //root tag                 doc.getDocumentElement().normalize();                 System.out.println("Root Element : "+doc.getDocumentElement().getNodeName());                                  // parsing tag                 NodeList nodeList = doc.getElementsByTagName("item");                 System.out.println("파싱할 리스트 수 : "+ nodeList.getLength());                 for(int temp =0; temp<nodeList.getLength(); temp++) {                     Node nNode = nodeList.item(temp);                     if(nNode.getNodeType()==Node.ELEMENT_NODE) {                         Element element = (Element) nNode;                         System.out.println("##########################");                         System.out.println("위도: "+getTagValue("lat", element));                         System.out.println("경도: "+getTagValue("lon", element));                         System.out.println("예보구역명(영문): "+getTagValue("regEn", element));                         System.out.println("예보구역코드: "+getTagValue("regId", element));                         System.out.println("예보구역명(한글): "+getTagValue("regName", element));                         System.out.println("지역특성: "+getTagValue("regSp", element));                         System.out.println("상위구역코드: "+getTagValue("regUp", element));                         System.out.println("순번: "+getTagValue("seq", element));                         System.out.println("3시간예보관서: "+getTagValue("stnF3", element));                         System.out.println("종료시각: "+getTagValue("tmEd", element));                         System.out.println("시작시각: "+getTagValue("tmSt", element));                     }//if                 }//for                 page += 1;                 if(page >12) {                     break;                 }             }//while          } catch (Exception e) {             e.printStackTrace();         }     }//main }