import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Map;
import java.net.URL;
public class CallAPI {
public static void main(String[] args) {
String accessToken = "Bearer " + "<접근 토큰>";
String op = "gti";
String version = "1";
Double lat = 37.4790896;
Double lon = 127.0375223;
Double tolLat = 0.01;
Double tolLon = 0.01;
String apiURL = "https://service.mqnicrnd5.com/api/v1/am/offer/gti?"
+ "op=" + op + "&"
+ "version=" + version + "&"
+ "lat=" + lat + "&"
+ "lon=" + lon + "&"
+ "tolLat=" + tolLat + "&"
+ "tolLon=" + tolLon ;
Map<String, String> requestHeaders = new HashMap<>();
requestHeaders.put("Authorization", accessToken);
String responseBody = get(apiURL,requestHeaders);
System.out.println(responseBody);
}
private static String get(String apiUrl, Map<String, String> requestHeaders) {
HttpURLConnection con = connect(apiUrl);
try {
con.setRequestMethod("GET");
for (Map.Entry<String, String> header : requestHeaders.entrySet()) {
con.setRequestProperty(header.getKey(), header.getValue());
}
int responseCode = con.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) { // 정상 호출
return readBody(con.getInputStream());
} else { // 오류 발생
return readBody(con.getErrorStream());
}
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
con.disconnect();
}
}
private static HttpURLConnection connect(String apiUrl) {
try {
URL url = new URL(apiUrl);
return (HttpURLConnection) url.openConnection();
} catch (MalformedURLException e) {
throw new RuntimeException("API URL이 잘못되었습니다. : " + apiUrl, e);
} catch (IOException e) {
throw new RuntimeException("연결이 실패했습니다. : " + apiUrl, e);
}
}
private static String readBody(InputStream body) {
InputStreamReader streamReader = new InputStreamReader(body);
try (BufferedReader lineReader = new BufferedReader(streamReader)) {
StringBuilder responseBody = new StringBuilder();
String line;
while ((line = lineReader.readLine()) != null) {
responseBody.append(line);
}
return responseBody.toString();
} catch (IOException e) {
throw new RuntimeException("API 응답을 읽는 데 실패했습니다.", e);
}
}
}