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:Main.java

public static void main(String args[]) throws Exception {
    URL url = new URL("http://www.google.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();

    System.out.println("Response Message is " + httpCon.getResponseMessage());

}

From source file:Main.java

public static void main(String args[]) throws Exception {
    URL url = new URL("http://www.google.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();

    System.out.println("Request method is " + httpCon.getRequestMethod());

}

From source file:Main.java

public static void main(String args[]) throws Exception {
    URL url = new URL("http://www.google.com");
    HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();

    System.out.println("Content-Type: " + httpCon.getContentType());

}

From source file:Main.java

public static void main(String args[]) throws Exception {
    byte[] b = new byte[1];
    URL url = new URL("http://www.server.com/a.gif");
    URLConnection urlConnection = url.openConnection();
    urlConnection.connect();//  www .  j a  va  2s  .co  m
    DataInputStream di = new DataInputStream(urlConnection.getInputStream());

    FileOutputStream fo = new FileOutputStream("a.gif");
    while (-1 != di.read(b, 0, 1))
        fo.write(b, 0, 1);
    di.close();
    fo.close();
}

From source file:MainClass.java

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

    URL url = new URL("http://www.yourdomain.com/form.jsp");
    URLConnection connection = url.openConnection();
    connection.setDoOutput(true);/*from   ww  w  .j av  a2 s .c om*/
    PrintWriter out = new PrintWriter(connection.getOutputStream());
    out.println("firstName=Joe");
    out.println("lastName=Average");
    out.close();

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL url = new URL("http://www.java2s.com/");
    URLConnection urlConnection = url.openConnection();
    Map<String, List<String>> headers = urlConnection.getHeaderFields();
    Set<Map.Entry<String, List<String>>> entrySet = headers.entrySet();
    for (Map.Entry<String, List<String>> entry : entrySet) {
        String headerName = entry.getKey();
        System.out.println("Header Name:" + headerName);
        List<String> headerValues = entry.getValue();
        for (String value : headerValues) {
            System.out.print("Header value:" + value);
        }//from  w  w  w . j ava  2  s .  c o m
        System.out.println();
    }
}

From source file:Main.java

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

    URL google = new URL("http://www.google.com/");
    URLConnection googleConnection = google.openConnection();
    DataInputStream dis = new DataInputStream(googleConnection.getInputStream());
    StringBuffer inputLine = new StringBuffer();
    String tmp;/*from w w w  .j  a v a 2  s  . co  m*/
    while ((tmp = dis.readLine()) != null) {
        inputLine.append(tmp);
        System.out.println(tmp);
    }
    // use inputLine.toString(); here it would have whole source
    dis.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
    data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");

    URL url = new URL("http://server.com:80/cgi");
    URLConnection conn = url.openConnection();
    conn.setDoOutput(true);/*  ww w .ja v  a 2  s  .  co m*/
    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
    wr.write(data);
    wr.flush();

    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line;
    while ((line = rd.readLine()) != null) {
        System.out.println(line);
    }
    wr.close();
    rd.close();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    URL url = new URL("http://www.java.com");
    URLConnection urlConnection = url.openConnection();
    HttpURLConnection connection = null;
    if (urlConnection instanceof HttpURLConnection) {
        connection = (HttpURLConnection) urlConnection;
    } else {//from  w  ww .j  a  v  a 2  s  .  com
        System.out.println("Please enter an HTTP URL.");
        return;
    }
    BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    String urlString = "";
    String current;
    while ((current = in.readLine()) != null) {
        urlString += current;
    }
    System.out.println(urlString);
}

From source file:Main.java

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

    URL url = new URL("http://www.java.com/");
    URLConnection urlConnection = url.openConnection();
    DataInputStream dis = new DataInputStream(urlConnection.getInputStream());
    String html = "", tmp = "";
    while ((tmp = dis.readUTF()) != null) {
        html += " " + tmp;
    }/*  w  w w.ja  v a  2s  .c  o  m*/
    dis.close();

    html = html.replaceAll("\\s+", " ");
    Pattern p = Pattern.compile("<title>(.*?)</title>");
    Matcher m = p.matcher(html);
    while (m.find() == true) {
        System.out.println(m.group(1));
    }
}