POSTMAN으로 API 확인

API와 Service Key를 사용하여 POSTMAN에서 GET 요청을 해보니 다음과 같은 XML 데이터가 보였다.

Spring Boot로 API 연동

XML

	import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;


@RestController
public class RestTestController {

    @GetMapping("/apitest")
    public String callApiWithXml() {
        StringBuffer result = new StringBuffer();
        try {
            String apiUrl = "http://apis.data.go.kr/B552584/EvCharger/getChargerInfo?" +
                    "serviceKey=[Service Key]" +
                    "&numOfRows=10" +
                    "&pageNo=4";
            URL url = new URL(apiUrl);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");

            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));

            String returnLine;
            result.append("<xmp>");
            while((returnLine = bufferedReader.readLine()) != null) {
                result.append(returnLine + "\n");
            }
            urlConnection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result + "</xmp>";
    }
}

위와 같이 데이터가 잘 보이는 것을 확인할 수 있었다.
공공 데이터는 대부분 XML로 제공된다.
요즘은 대부분 JSON을 사용하기 때문에 JSON으로 바꾸는 작업도 진행하였다.

JSON

	import org.json.JSONObject;
import org.json.XML;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;


@RestController
public class RestTestController {

    @GetMapping("/jsonapi")
    public String callApiWithJson() {
        StringBuffer result = new StringBuffer();
        String jsonPrintString = null;
        try {
            String apiUrl = "http://apis.data.go.kr/B552584/EvCharger/getChargerInfo?" +
                    "serviceKey=[Service Key]" +
                    "&numOfRows=10" +
                    "&pageNo=4";
            URL url = new URL(apiUrl);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.connect();
            BufferedInputStream bufferedInputStream = new BufferedInputStream(urlConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(bufferedInputStream, "UTF-8"));
            String returnLine;
            while((returnLine = bufferedReader.readLine()) != null) {
                result.append(returnLine);
            }

            JSONObject jsonObject = XML.toJSONObject(result.toString());
            jsonPrintString = jsonObject.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return jsonPrintString;
    }
}