#37 java: kakao map api

java/api/build.gradle

@@ -21,6 +21,9 @@ dependencies {
 
     implementation 'com.itextpdf:itext7-core:8.0.0'
 
+    implementation 'com.squareup.okhttp3:okhttp:4.11.0'
+    implementation 'org.apache.httpcomponents:httpclient:4.5.14'
+
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
 }

java/api/src/main/java/kr/kakao/map/KakaoApi.java

@@ -0,0 +1,49 @@
+package kr.kakao.map;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.util.EntityUtils;
+
+import java.io.IOException;
+import java.net.URLEncoder;
+
+public class KakaoApi {
+
+    private static String API_KEY = "";
+
+    private static final String API_BASE_URL = "https://dapi.kakao.com/v2/local/search/address.json";
+    private static final Gson gson = new Gson();
+
+    public static double[] getAddressCoordinate(String address) throws IOException {
+        String encodedAddress = URLEncoder.encode(address, "UTF-8");
+        String requestUrl = API_BASE_URL + "?query=" + encodedAddress;
+
+        CloseableHttpClient httpClient = HttpClients.createDefault();
+        HttpGet httpGet = new HttpGet(requestUrl);
+        httpGet.setHeader("Authorization", "KakaoAK " + API_KEY);
+
+        try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
+            String responseBody = EntityUtils.toString(response.getEntity());
+            JsonObject jsonObject = gson.fromJson(responseBody, JsonObject.class);
+            JsonArray documents = jsonObject.getAsJsonArray("documents");
+
+            if (documents.size() > 0) {
+                JsonObject document = documents.get(0).getAsJsonObject();
+                double latitude = document.get("y").getAsDouble();
+                double longitude = document.get("x").getAsDouble();
+                return new double[]{latitude, longitude};
+            } else {
+                return null;
+            }
+        }
+    }
+
+    public static void setApiKey(String apiKey) {
+        API_KEY = apiKey;
+    }
+}

java/api/src/main/java/kr/kakao/map/KakaoMapMain.java

@@ -0,0 +1,31 @@
+package kr.kakao.map;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class KakaoMapMain {
+
+    public static void main(String[] args) {
+        final String apiKey = args[0];
+        KakaoApi.setApiKey(apiKey);
+
+        try {
+            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+            System.out.print("주소를 입력하세요: ");
+            String address = reader.readLine();
+
+            double[] coordinate = KakaoApi.getAddressCoordinate(address);
+
+            if (coordinate != null) {
+                System.out.println("주소: " + address);
+                System.out.println("위도: " + coordinate[0]);
+                System.out.println("경도: " + coordinate[1]);
+            } else {
+                System.out.println("주소를 찾을 수 없습니다.");
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}