发送cookie

try {
        // Create a URLConnection object for a URL
        URL url = new URL("http://hostname:80");
        URLConnection conn = url.openConnection();
    
        // Set the cookie value to send
        conn.setRequestProperty("Cookie", "name1=value1; name2=value2");
    
        // Send the request to the server
        conn.connect();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    }


 try {
        // Create a URLConnection object for a URL
        URL url = new URL("http://hostname:80");
        URLConnection conn = url.openConnection();
    
        // List all the response headers from the server.
        // Note: The first call to getHeaderFieldKey() will implicit send
        // the HTTP request to the server.
        for (int i=0; ; i++) {
            String headerName = conn.getHeaderFieldKey(i);
            String headerValue = conn.getHeaderField(i);
    
            if (headerName == null && headerValue == null) {
                // No more headers
                break;
            }
            if (headerName == null) {
                // The header value contains the server's HTTP version
            }
        }
    } catch (Exception e) {
    }

Here's a sample of headers from a website: 
    Key=Value
    
    null=HTTP/1.1 200 OK
    Server=Netscape-Enterprise/4.1
    Date=Mon, 11 Feb 2002 09:23:26 GMT
    Cache-control=public
    Content-type=text/html
    Etag="9fa67d2a-58-71-3bbdad3283"
    Last-modified=Fri, 05 Oct 2001 12:53:06 GMT
    Content-length=115
    Accept-ranges=bytes
    Connection=close

try {
        // Create a URLConnection object for a URL
        URL url = new URL("http://hostname:80");
        URLConnection conn = url.openConnection();
    
        // Get all cookies from the server.
        // Note: The first call to getHeaderFieldKey() will implicit send
        // the HTTP request to the server.
        for (int i=0; ; i++) {
            String headerName = conn.getHeaderFieldKey(i);
            String headerValue = conn.getHeaderField(i);
    
            if (headerName == null && headerValue == null) {
                // No more headers
                break;
            }
            if ("Set-Cookie".equalsIgnoreCase(headerName)) {
                // Parse cookie
                String[] fields = headerValue.split(";\\s*");
    
                String cookieValue = fields[0];
                String expires = null;
                String path = null;
                String domain = null;
                boolean secure = false;
    
                // Parse each field
                for (int j=1; j<fields.length; j++) {
                    if ("secure".equalsIgnoreCase(fields[j])) {
                        secure = true;
                    } else if (fields[j].indexOf('=') > 0) {
                        String[] f = fields[j].split("=");
                        if ("expires".equalsIgnoreCase(f[0])) {
                            expires = f[1];
                        } else if ("domain".equalsIgnoreCase(f[0])) {
                            domain = f[1];
                        } else if ("path".equalsIgnoreCase(f[0])) {
                            path = f[1];
                        }
                    }
                }
    
                // Save the cookie...
            }
        }
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    }

Here's a sample of cookies from two websites: 
    B=a43ka6gu6f4n4&b=2; expires=Thu, 15 Apr 2010 20:00:00 GMT;
        path=/; domain=.yahoo.com
    
    PREF=ID=e51:TM=686:LM=86:S=BL-w0; domain=.google.com; path=/;
        expires=Sun, 17-Jan-2038 19:14:07 GMT

// Disable automatic redirects for all HTTP requests
    HttpURLConnection.setFollowRedirects(false);
    
    // Disable automatic redirects for a particular connection
    try {
        // Create a URLConnection object for a URL
        URL url = new URL("http://hostname:80");
        URLConnection conn = url.openConnection();
    
        // Disable automatic redirects just for this connection
        HttpURLConnection httpConn = (HttpURLConnection)conn;
        httpConn.setInstanceFollowRedirects(false);
    
        // Send the request to the server
        conn.connect();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    }