private byte[] queryData() throws Exception {
        java.net.URL connUrl = new URL(url);
        
        java.net.HttpURLConnection conn = (HttpURLConnection) connUrl.openConnection();
        conn.setRequestProperty("User-agent","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; Maxthon 2.0)");
        java.io.InputStream input = conn.getInputStream();
        byte[] data = new byte[1024];
        int length = 0;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        while ((length = input.read(data)) > 0) {
            baos.write(data, 0, length);
        }
        conn.disconnect();
        return baos.toByteArray();
    }

java.io.InputStream input = conn.getInputStream();

        String cookie = "";
        do {
            HttpURLConnection conn = (HttpURLConnection) new URL("http://www.google.com.hk/search?q=%E5%A6%87%E5%A5%B3&hl=zh-CN").openConnection();
            if(cookie.length() != 0)
                conn.setRequestProperty("Cookie", cookie);
            conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0)");
            conn.setInstanceFollowRedirects(false);
            int code = conn.getResponseCode();
            if(code == HttpURLConnection.HTTP_MOVED_TEMP) {
                cookie += conn.getHeaderField("Set-Cookie") + ";";
            }
            if(conn.getResponseCode() == HttpURLConnection.HTTP_OK)
                break;
        } while(true);