REST API 호출 예제

URL url = new URL(serviceURL);
URLConnection conn = url.openConnection();

String userCredentials = "username:password";
String basicAuth = " " + new String(Base64.getEncoder().encode(userCredentials.getBytes()));

// api 키 값 설정
conn.setRequestProperty ("Authorization", basicAuth);
conn.setRequestMethod("POST");
// Content-Type이 무엇인지 API 연동 업체에 꼭 문의해야 함.
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
//conn.setRequestProperty("Content-Length", "" + postData.getBytes().length);
//conn.setRequestProperty("Content-Language", "en-US");

conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);

DataOutputStream osw = null;
BufferedReader br = null;
// response data
StringBuffer sbResponse = new StringBuffer();
boolean isSuccess = true;

try {
      osw = new DataOutputStream(conn.getOutputStream());
      // 서버로 전송할 데이터
      osw.writeBytes("jsonData=" + URLEncoder.encode(param.toString(), "UTF-8"));
      osw.flush();
 
      br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
 
      String line = null;
       
      while ((line = br.readLine()) != null) {
        sbResponse.append(line);
      }
catch(Exception e) {
	isSuccess = false;
}
finally {
	if(null != osw) {
    	osw.close();
    }
    
    if(null != br) {
    	br.close();
    }
}