HTTPクライアント POSTの例
http://localhost:8080にPOSTでアクセスして、
レスポンスをUTF-8でエンコーディングしてコンソールに表示する。
public class SamplePostHttpClient { public static void main(String[] args) throws IOException { String url = "http://localhost:8080/"; HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); // HTTPSの場合、HttpsUrlConnectionにキャストすれば良い connection.setRequestMethod("POST"); connection.setDoOutput(true); BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream(), StandardCharsets.UTF_8)); writer.write("Hello World"); writer.flush(); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { StringBuilder builder = new StringBuilder(); String line; while ((line = reader.readLine()) != null) { builder.append(line); } System.out.println(builder); } } }