String Mid = "";                                                                                   // 발급받은 테스트 Mid 설정(Real 전환 시 운영 Mid 설정)
String MerchantKey = "";                                                                  // 발급받은 테스트 상점키 설정(Real 전환 시 운영 상점키 설정)
String EdiDate = getyyyyMMddHHmmss();
String Amt = "1004";
String EncryptData = encodeSHA256Base64(EdiDate + Mid + Amt + MerchantKey);
String today = getyyyyMMddHHmm();		                                   // 현재일자. 캐시방지용으로 사용

/* SHA256 암호화 */
public static final String encodeSHA256Base64(String strPW) {
    String passACL = null;
    MessageDigest md = null;

    try {
        md = MessageDigest.getInstance("SHA-256");
    } catch (Exception e) {
        e.printStackTrace();
    }

    md.update(strPW.getBytes());
    byte[] raw = md.digest();
    byte[] encodedBytes = Base64.encodeBase64(raw);
    passACL = new String(encodedBytes);

    return passACL;
}

/* 현재일자 */
public static final String getyyyyMMddHHmmss() {
    SimpleDateFormat yyyyMMddHHmmss = new SimpleDateFormat("yyyyMMddHHmmss");
    return yyyyMMddHHmmss.format(new Date());
}

/* 현재일자  */
public static final String getyyyyMMddHHmm() {
    SimpleDateFormat yyyyMMddHHmm = new SimpleDateFormat("yyyyMMddHHmm");
    return yyyyMMddHHmm.format(new Date());
}

        
String url = "https://tapproval.smartropay.co.kr/payment/approval/urlCallApproval.do";		// 테스트
//String url = "https://approval.smartropay.co.kr/payment/approval/urlCallApproval.do";   	// 운영

String Tid       = request.getParameter("Tid")==null?"":request.getParameter("Tid");
String TrAuthKey = request.getParameter("TrAuthKey")==null?"":request.getParameter("TrAuthKey");

HashMap<String, Object> result = callApi(TrAuthKey , Tid, url);

public HashMap<String, Object> callApi(String TrAuthKey, String Tid, String callUrl) {

	StringBuilder responseBody = null;
	HashMap<String, Object> result = new HashMap<>();

	// http urlCall 승인 요청 및 TrAuthKey 유효성 검증
	int connectTimeout = 1000;
	int readTimeout = 10000; // 가맹점에 맞게 TimeOut 조절

	URL url = null;
	HttpsURLConnection connection = null;

	try {
		SSLContext sslCtx = SSLContext.getInstance("TLSv1.2");
		sslCtx.init(null, null, new SecureRandom());

    	url = new URL(callUrl);
    	System.out.println(" url " + url.toString());
    	connection = (HttpsURLConnection)url.openConnection();
    	connection.setSSLSocketFactory(sslCtx.getSocketFactory());

    	connection.addRequestProperty("Content-Type", "application/json");
    	connection.addRequestProperty("Accept", "application/json");
    	connection.setDoOutput(true);
    	connection.setDoInput(true);
    	connection.setConnectTimeout(connectTimeout);
    	connection.setReadTimeout(readTimeout);

    	OutputStreamWriter osw = new OutputStreamWriter(new BufferedOutputStream(connection.getOutputStream()) , "utf-8" );

    	JSONObject body = new JSONObject();
    	body.put("Tid" ,Tid);
    	body.put("TrAuthKey" ,TrAuthKey);

    	char[] bytes = body.toString().toCharArray();
    	osw.write(bytes,0,bytes.length);
    	osw.flush();
    	osw.close();

    	BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));
    	String line = null;
    	responseBody =  new StringBuilder();
    	while ((line = br.readLine()) != null) {
    		System.out.println(" response " +  line);
    		responseBody.append(line);
    	}
    	br.close();

    	// 결제결과
    	result = new ObjectMapper().readValue(responseBody.toString(), HashMap.class);

	} catch (MalformedURLException e) {
		// TODO Auto-generated catch block
    	e.printStackTrace();
	} catch (IOException e) {
		// TODO Auto-generated catch block
    	e.printStackTrace();
	} catch (Exception e) {
		e.printStackTrace();
	}
    return result;
}
		
	

        
String url = "https://tapproval.smartropay.co.kr/payment/approval/approvalInquiry.do";		// 테스트
//String url = "https://approval.smartropay.co.kr/payment/approval/approvalInquiry.do";   	// 운영

String Tid       = request.getParameter("Tid")==null?"":request.getParameter("Tid");
String TrAuthKey = request.getParameter("TrAuthKey")==null?"":request.getParameter("TrAuthKey");

HashMap<String, Object> result = callApi(TrAuthKey , Tid, url);

public HashMap<String, Object> callApi(String TrAuthKey, String Tid, String callUrl) {

	StringBuilder responseBody = null;
	HashMap<String, Object> result = new HashMap<>();

	// http urlCall 승인 요청 및 TrAuthKey 유효성 검증
	int connectTimeout = 1000;
	int readTimeout = 10000; // 가맹점에 맞게 TimeOut 조절

	URL url = null;
	HttpsURLConnection connection = null;

	try {
		SSLContext sslCtx = SSLContext.getInstance("TLSv1.2");
		sslCtx.init(null, null, new SecureRandom());

    	url = new URL(callUrl);
    	System.out.println(" url " + url.toString());
    	connection = (HttpsURLConnection)url.openConnection();
    	connection.setSSLSocketFactory(sslCtx.getSocketFactory());

    	connection.addRequestProperty("Content-Type", "application/json");
    	connection.addRequestProperty("Accept", "application/json");
    	connection.setDoOutput(true);
    	connection.setDoInput(true);
    	connection.setConnectTimeout(connectTimeout);
    	connection.setReadTimeout(readTimeout);

    	OutputStreamWriter osw = new OutputStreamWriter(new BufferedOutputStream(connection.getOutputStream()) , "utf-8" );

    	JSONObject body = new JSONObject();
    	body.put("Tid" ,Tid);
    	body.put("TrAuthKey" ,TrAuthKey);

    	char[] bytes = body.toString().toCharArray();
    	osw.write(bytes,0,bytes.length);
    	osw.flush();
    	osw.close();

    	BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));
    	String line = null;
    	responseBody =  new StringBuilder();
    	while ((line = br.readLine()) != null) {
    		System.out.println(" response " +  line);
    		responseBody.append(line);
    	}
    	br.close();

    	// 결제결과
    	result = new ObjectMapper().readValue(responseBody.toString(), HashMap.class);

	} catch (MalformedURLException e) {
		// TODO Auto-generated catch block
    	e.printStackTrace();
	} catch (IOException e) {
		// TODO Auto-generated catch block
    	e.printStackTrace();
	} catch (Exception e) {
		e.printStackTrace();
	}
    return result;
}