package com.example.sample; // https://mvnrepository.com/artifact/com.auth0/java-jwt import com.auth0.jwt.JWT; import com.auth0.jwt.algorithms.Algorithm; // https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.entity.StringEntity; import org.apache.http.util.EntityUtils; import com.fasterxml.jackson.databind.ObjectMapper; import java.io.IOException; import java.math.BigInteger; import java.nio.charset.StandardCharsets; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import java.util.UUID; public class POSTBatchArgs { public static void main(String[] args) throws NoSuchAlgorithmException, IOException { String accessKey = "발급받은 API KEY"; String secretKey = "발급받은 SECRET KEY"; String apiUrl = "https://api.bithumb.com"; // Set API parameters - 다건 주문 목록 구성 (최대 20건) List> batchOrders = new ArrayList<>(); Map order1 = new LinkedHashMap<>(); order1.put("market", "KRW-BTC"); order1.put("side", "bid"); order1.put("order_type", "limit"); order1.put("price", "84000000"); order1.put("volume", "0.001"); order1.put("time_in_force", "ioc"); order1.put("client_order_id", "20260508-test00"); batchOrders.add(order1); Map order2 = new LinkedHashMap<>(); order2.put("market", "KRW-BTC"); order2.put("side", "bid"); order2.put("order_type", "limit"); order2.put("price", "83000000"); order2.put("volume", "0.001"); order2.put("client_order_id", "20260508-test01"); batchOrders.add(order2); Map order3 = new LinkedHashMap<>(); order3.put("market", "KRW-BTC"); order3.put("side", "bid"); order3.put("order_type", "limit"); order3.put("price", "85000000"); order3.put("volume", "0.001"); order3.put("client_order_id", "20260508-test6"); batchOrders.add(order3); Map requestBody = new LinkedHashMap<>(); requestBody.put("batch_orders", batchOrders); // Generate access token // batch_orders는 배열 인덱스 포맷으로 query string 생성 List queryParts = new ArrayList<>(); for (int i = 0; i < batchOrders.size(); i++) { for (Map.Entry entry : batchOrders.get(i).entrySet()) { queryParts.add("batch_orders[" + i + "][" + entry.getKey() + "]=" + entry.getValue()); } } String query = String.join("&", queryParts); MessageDigest md = MessageDigest.getInstance("SHA-512"); md.update(query.getBytes(StandardCharsets.UTF_8)); String queryHash = String.format("%0128x", new BigInteger(1, md.digest())); Algorithm algorithm = Algorithm.HMAC256(secretKey); String jwtToken = JWT.create() .withClaim("access_key", accessKey) .withClaim("nonce", UUID.randomUUID().toString()) .withClaim("timestamp", System.currentTimeMillis()) .withClaim("query_hash", queryHash) .withClaim("query_hash_alg", "SHA512") .sign(algorithm); String authenticationToken = "Bearer " + jwtToken; // Call API final HttpPost httpRequest = new HttpPost(apiUrl + "/v2/orders/batch"); httpRequest.addHeader("Authorization", authenticationToken); httpRequest.addHeader("Content-type", "application/json"); httpRequest.setEntity(new StringEntity(new ObjectMapper().writeValueAsString(requestBody), StandardCharsets.UTF_8)); try (CloseableHttpClient client = HttpClients.createDefault(); CloseableHttpResponse response = client.execute(httpRequest)) { // handle to response int httpStatus = response.getStatusLine().getStatusCode(); String responseBody = EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8); System.out.println(httpStatus); System.out.println(responseBody); } catch (Exception e) { throw new RuntimeException(e); } } }

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