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

private static InputStream getInputStreamFromURL(String urlStr) {
    HttpURLConnection urlConn = null;
    InputStream inputStream = null;

    try {//from   w w  w .ja v a2  s .  co  m
        URL url = new URL(urlStr);
        urlConn = (HttpURLConnection) url.openConnection();
        inputStream = urlConn.getInputStream();
    } catch (IOException e) {
        return null;
    }
    return inputStream;
}

From source file:Main.java

public static InputStream getRequest(String path) throws Exception {
    URL url = new URL(path);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");
    conn.setConnectTimeout(5000);// w  ww . j a v a 2s.c o  m
    if (conn.getResponseCode() == 200) {
        return conn.getInputStream();
    }
    return null;
}

From source file:Main.java

private static HttpURLConnection getConnection(URL url) throws IOException {
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");
    conn.setDoInput(true);//w  w w.  j  a  v  a2s  . c  o  m
    conn.setDoOutput(true);
    conn.setRequestProperty("Accept", "text/xml");
    return conn;
}

From source file:Main.java

static void getHTTPXml(URL url) throws Exception {
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setRequestProperty("ACCEPT", "application/xml");
    InputStream xml = conn.getInputStream();

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    org.w3c.dom.Document document = builder.parse(xml);

    System.out.println(document);
    String doctype = conn.getContentType();
    System.out.println(doctype);//from www  . j a va  2 s  .co  m

    XPathFactory pathFactory = XPathFactory.newInstance();
    XPath path = pathFactory.newXPath();
    XPathExpression expression;
    expression = path.compile("/result/checkid");
    NodeList nodeList = (NodeList) expression.evaluate(document, XPathConstants.NODESET);
    String checkids[] = getNodeValue(nodeList);
    for (String checkid : checkids) {
        System.out.print(checkid + ", ");
    }
    conn.disconnect();
}

From source file:Main.java

/**
 * Makes an HTTP request using GET method to the specified URL.
 *
 * @param requestURL/* w w w.  jav a  2s.c o  m*/
 *            the URL of the remote server
 * @return An HttpURLConnection object
 * @throws IOException
 *             thrown if any I/O error occurred
 */
public static HttpURLConnection sendGetRequest(String requestURL) throws IOException {
    URL url = new URL(requestURL);
    httpConn = (HttpURLConnection) url.openConnection();
    httpConn.setUseCaches(false);

    httpConn.setDoInput(true); // true if we want to read server's response
    httpConn.setDoOutput(false); // false indicates this is a GET request

    return httpConn;
}

From source file:com.digitallizard.bbcnewsreader.resource.web.ImageDownloader.java

public static byte[] getImage(URL url) throws Exception {
    URLConnection connection = url.openConnection();

    InputStream stream = connection.getInputStream();
    BufferedInputStream inputbuffer = new BufferedInputStream(stream, 8000);

    ByteArrayBuffer arraybuffer = new ByteArrayBuffer(50);
    int current = 0;
    while ((current = inputbuffer.read()) != -1) {
        arraybuffer.append((byte) current);
    }/*from  www . j  a v a 2  s  . c  om*/

    byte[] image = arraybuffer.toByteArray();

    return image;
}

From source file:Main.java

/** 
 * Get image from newwork /* w  w w.j  a v  a2  s . c om*/
 * @param path The path of image 
 * @return InputStream 
 * @throws Exception 
 */
public static InputStream getImageStream(String path) throws Exception {
    URL url = new URL(path);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(5 * 1000);
    conn.setRequestMethod("GET");
    if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
        return conn.getInputStream();
    }
    return null;
}

From source file:Main.java

private static InputStream getHttpConnection(String urlString) throws IOException {
    InputStream stream = null;//from   w  w  w. j  a v  a2  s  .  co m
    URL url = new URL(urlString);
    URLConnection connection = url.openConnection();

    try {
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        httpConnection.setRequestMethod("GET");
        httpConnection.connect();

        if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            stream = httpConnection.getInputStream();
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return stream;
}

From source file:Main.java

public static Bitmap getBitmap(String path) {
    try {//from  ww  w  .ja va2 s  . c o m
        URL url = new URL(path);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        InputStream is = conn.getInputStream();
        return BitmapFactory.decodeStream(is);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

From source file:Main.java

/**
 * Makes HttpURLConnection and returns InputStream
 *///from  w  ww . j  a va  2s  .  c  om
private static InputStream getHttpConnection(String urlString) throws IOException {
    InputStream stream = null;
    URL url = new URL(urlString);
    URLConnection connection = url.openConnection();

    try {
        HttpURLConnection httpConnection = (HttpURLConnection) connection;
        httpConnection.setRequestMethod("GET");
        httpConnection.connect();

        if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
            stream = httpConnection.getInputStream();
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return stream;
}