用Java進行HTTP請求的代碼示例

採用JDK自帶API的方式： InputStream in = null; try { URLConnection connection = new URL(url).openConnection(); connection.setConnectTimeout(1000 * 60); // 設置連接超時時間: 60s connection.setReadTimeout(1000 * 60); // 設置讀取超時時間: 60s connection.connect(); in = connection.getInputStream(); // 獲取HTTP響應結果 int length; byte[] buffer = new byte[1024 * 4]; StringBuilder stringBuffer = new StringBuilder(); while ((length = in.read(buffer)) != -1) { stringBuffer.append(new String(buffer, 0, length)); } String response = stringBuffer.toString(); } catch (IOException e) { // 出錯處理代碼... } finally { // 關閉輸入流 FileUtils.close(in); } 採用Commons HttpClient類庫的方式： HttpClient client = new HttpClient(); client.getHttpConnectionManager().getParams().setConnectionTimeout(60000); // 設置連接超時時間: 60s client.getHttpConnectionManager().getParams().setSoTimeout(600000); // 設置讀取超時時間: 60s HttpMethod method = new GetMethod(url); // 以GET方式請求 method.setQueryString("id=1"); // 設置請求參數 client.executeMethod(method); // 獲取HTTP響應結果 String response = method.getResponseBodyAsString(); method.releaseConnection(); // 關閉連接