Java URL.openConnection方法代碼示例

import java.net.URL; //導入方法依賴的package包/類
@Override
protected String doInBackground(String... urls) {

    try {
        // zakładamy, że jest tylko jeden URL
        URL url = new URL(urls[0]);
        URLConnection connection = url.openConnection();

        // pobranie danych do InputStream
        InputStream in = new BufferedInputStream(
                connection.getInputStream());

        // konwersja InputStream na String
        // wynik będzie przekazany do metody onPostExecute()
        return streamToString(in);

    } catch (Exception e) {
        // obsłuż wyjątek
        Log.d(MainActivity.class.getSimpleName(), e.toString());
        return null;
    }

}
 

import java.net.URL; //導入方法依賴的package包/類
/** access a url, ignoring some IOException such as the page does not exist */
static void access(String urlstring) throws IOException {
  LOG.warn("access " + urlstring);
  URL url = new URL(urlstring);
  URLConnection connection = url.openConnection();
  connection.connect();
  
  try {
    BufferedReader in = new BufferedReader(new InputStreamReader(
        connection.getInputStream()));
    try {
      for(; in.readLine() != null; );
    } finally {
      in.close();
    }
  } catch(IOException ioe) {
    LOG.warn("urlstring=" + urlstring, ioe);
  }
}
 

import java.net.URL; //導入方法依賴的package包/類
public String queryAPI(String query) throws IOException {
    URL url = new URL(API_URL + query);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();

    int responseCode = connection.getResponseCode();
    if (responseCode != 200) {
        throw new IOException("Server responded with: " + responseCode + " " + connection.getResponseMessage());
    }

    InputStream input = connection.getInputStream();
    BufferedReader reader = new BufferedReader(new InputStreamReader(input));
    StringBuilder response = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        response.append(line);
    }
    input.close();
    return response.toString();
}
 

import java.net.URL; //導入方法依賴的package包/類
private static String getData(
        String target,
        String method,
        String token)
{
    try {
        URL url = new URL(target);
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();

        if (!TextUtils.isEmpty(token)) {
            conn.setRequestProperty("Authorization", token);
        }

        conn.setRequestMethod(method);
        conn.connect();

        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line, data = "";
        while ((line = in.readLine()) != null) {
            data += line;
        }
        in.close();

        return data;
    } catch (IOException ignored) {
        ignored.printStackTrace();
    }

    return null;
}
 

import java.net.URL; //導入方法依賴的package包/類
/**
 * Submits an HTTP POST request to the given URL.
 *
 * @param url the URL to receive the POST request
 * @return the reply
 * @throws IOException in case of failure
 */
public InputStream post(URL url) throws IOException {
  writeEnd();

  OutputStream out = null;
  try {
    final HttpURLConnection http = (HttpURLConnection) url.openConnection();

    http.setRequestMethod("POST");
    http.setDoInput(true);
    http.setDoOutput(true);
    http.setUseCaches(false);
    http.setAllowUserInteraction(false);

    http.setRequestProperty("Content-Type",
      "multipart/form-data; boundary=" + boundary);
    http.setRequestProperty("Content-Length", String.valueOf(bytes.size()));

    out = http.getOutputStream();
    bytes.writeTo(out);
    out.close();

    return http.getInputStream();
  }
  finally {
    IOUtils.closeQuietly(out);
  }
}
 

import java.net.URL; //導入方法依賴的package包/類
/**
* 獲取遠程服務器ATN結果
* @param urlvalue 指定URL路徑地址
* @return 服務器ATN結果
* 驗證結果集：
* invalid命令參數不對 出現這個錯誤，請檢測返回處理中partner和key是否為空 
* true 返回正確信息
* false 請檢查防火牆或者是服務器阻止端口問題以及驗證時間是否超過一分鍾
*/
private static String checkUrl(String urlvalue) {
    String inputLine = "";

    try {
        URL url = new URL(urlvalue);
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
        BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection
            .getInputStream()));
        inputLine = in.readLine().toString();
    } catch (Exception e) {
        e.printStackTrace();
        inputLine = "";
    }

    return inputLine;
}
 

import java.net.URL; //導入方法依賴的package包/類
/**
 * 獲取所有客服帳號
 *
 * @return
 */
public static String getAllKfAccount() {
    String token = WeiXinUtils.getToken();
    if (token != null) {
        String urlString = "https://api.weixin.qq.com/cgi-bin/customservice/getkflist?access_token=" + token;
        try {
            URL url = new URL(urlString);
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) url.openConnection();
            httpsURLConnection.setDoInput(true);
            DataInputStream dataInputStream = new DataInputStream(httpsURLConnection.getInputStream());
            StringBuffer stringBuffer = new StringBuffer();
            int inputByte = dataInputStream.read();
            while (inputByte != -1) {
                stringBuffer.append((char) inputByte);
                inputByte = dataInputStream.read();
            }
            String kfString = stringBuffer.toString();
            return kfString;
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    return null;
}
 

import java.net.URL; //導入方法依賴的package包/類
public static JSONObject postJson(String url, String data) throws IOException, JSONException {
  //Log.d("postJson " + url+" med data="+data);
  URL u = new URL(url);
  HttpURLConnection urlConnection = (HttpURLConnection) u.openConnection();
  urlConnection.setConnectTimeout(15000);
  urlConnection.setReadTimeout(90 * 1000);   // 1 1/2 minut
  urlConnection.setRequestProperty("Content-Type", "application/json");
  urlConnection.setDoOutput(true);
  urlConnection.connect(); // http://stackoverflow.com/questions/8179658/urlconnection-getcontent-return-null
  OutputStream os = urlConnection.getOutputStream();
  os.write(data.getBytes());
  os.close();
  InputStream is = urlConnection.getInputStream();
  if (urlConnection.getResponseCode() != 200)
    throw new IOException("HTTP-svar var " + urlConnection.getResponseCode() + " " + urlConnection.getResponseMessage() + " for " + u);

  tjekOmdirigering(u, urlConnection);

  return new JSONObject(læsStreng(is));
}
 

import java.net.URL; //導入方法依賴的package包/類
public ProxyURLConnection(
  URL url,
  URL proxied
  ) throws IOException
{
  super(url);
  
  _delegate = proxied.openConnection();
}
 

import java.net.URL; //導入方法依賴的package包/類
public String getRoomID(String WEBSERVICE_URL, String AUTHTOKEN, String roomName) {
    // Convert config room name to lowercase with no spaces
    roomName = roomName.toLowerCase().replaceAll("\\s+", "");

    try {

        URL url = new URL("http://" + WEBSERVICE_URL + "/data/domain/");
        HttpURLConnection con = (HttpURLConnection) url.openConnection();
        con.setConnectTimeout(TIMEOUT);
        con.setRequestMethod(METHOD);
        con.setRequestProperty("SECRET", AUTHTOKEN);

        InputStream response = con.getInputStream();

        try (Scanner scanner = new Scanner(response)) {
            String responseBody = scanner.useDelimiter("\\A").next();
            HeatHub hh = new Gson().fromJson(responseBody, HeatHub.class);
            for (Room myRoom : hh.getRoom()) {
                String myRoomName = myRoom.name.toLowerCase().replaceAll("\\s+", "");
                if (myRoomName.equals(roomName)) {
                    return myRoom.id.toString();
                }
            }
        }
    } catch (IOException e) {
        logger.warn("Communication error occurred while getting your Drayton Wiser information: {}",
                e.getMessage());
    }
    return null;
}
 

import java.net.URL; //導入方法依賴的package包/類
static URLConnection openConn(String urlk) throws MalformedURLException, IOException {  

      URL url = new URL(urlk);  
      HttpURLConnection hsu = (HttpURLConnection) url.openConnection();  
      hsu.setDoInput(true);  
      hsu.setDoOutput(true);  
      hsu.setRequestMethod("POST");  
      return hsu;  

  }
 

import java.net.URL; //導入方法依賴的package包/類
@SmallTest
@Feature({"Cronet"})
@CompareDefaultWithCronet
// Regression test for crbug.com/571436.
public void testDefaultToPostWhenDoOutput() throws Exception {
    URL url = new URL(NativeTestServer.getEchoMethodURL());
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setDoOutput(true);
    OutputStream out = connection.getOutputStream();
    out.write("dummy data".getBytes());
    assertEquals(200, connection.getResponseCode());
    assertEquals("OK", connection.getResponseMessage());
    assertEquals("POST", TestUtil.getResponseAsString(connection));
    connection.disconnect();
}
 

import java.net.URL; //導入方法依賴的package包/類
private URLConnection openConnection(URL localURL) throws Exception {
    URLConnection connection;
    if (proxyHost != null && proxyPort != null) {
        Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
        connection = localURL.openConnection(proxy);
    } else {
        connection = localURL.openConnection();
    }
    return connection;
}
 

import java.net.URL; //導入方法依賴的package包/類
private static HttpURLConnection createConnection() throws Exception {
    URL url = new URL(PROFILE_URL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setUseCaches(false);
    connection.setDoInput(true);
    connection.setDoOutput(true);
    return connection;
}
 

import java.net.URL; //導入方法依賴的package包/類
protected void extractJarFile (URL url, String configuration_folder,
   String dest_folder) throws IOException
{
   final JarURLConnection connection
         = (JarURLConnection) url.openConnection ();
   if (connection != null)
   {
      Enumeration<JarEntry> entries = connection.getJarFile ().entries ();
      while (entries.hasMoreElements ())
      {
         JarEntry entry = (JarEntry) entries.nextElement ();
         if (!entry.isDirectory () && entry.getName ().equals (
               configuration_folder))
         {
            InputStream in = connection.getJarFile ().getInputStream (entry);
            try
            {
               File file =
                     new File (dest_folder);
               if (!file.getParentFile ().exists ())
               {
                  file.getParentFile ().mkdirs ();
               }
               OutputStream out = new FileOutputStream (file);
               try
               {
                  IOUtils.copy (in, out);
               }
               finally
               {
                  out.close ();
               }
            }
            finally
            {
               in.close ();
            }
         }
      }
   }
}