Sending a HTTP request with Java + Google Guava

Something.java

       public void sendMessage(String url, String params){
            final HttpURLConnection connection;
            try {
                URL requestUrl = new URL(url);
                connection = (HttpURLConnection) requestUrl.openConnection();
                connection.setDoOutput(true);

                connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                connection.setRequestProperty("Content-Length", Integer.toString(params.getBytes().length));
                connection.setRequestProperty("Content-Language", "en-US");

                sendRequest(params, connection);
                String response = readResponse(connection);
                System.out.println("Received response: "+response);
                connection.disconnect();
            } catch (IOException e) {
                throw Throwables.propagate(e);
            }
        }

        private void sendRequest(String paramsToSend, final HttpURLConnection connection) throws IOException {
            OutputSupplier<BufferedOutputStream> outputSupplier = new OutputSupplier<BufferedOutputStream>() {
                @Override
                public BufferedOutputStream getOutput() throws IOException {
                    return new BufferedOutputStream(connection.getOutputStream());
                }
            };
            ByteStreams.write(paramsToSend.getBytes(), outputSupplier);
        }
        
        private String readResponse(final HttpURLConnection connection) throws IOException {
            InputSupplier<InputStreamReader> supplier = CharStreams.newReaderSupplier(new InputSupplier<InputStream>() {
                @Override
                public InputStream getInput() throws IOException {
                    return connection.getInputStream();
                }
            }, Charset.defaultCharset());
            return CharStreams.toString(supplier);
        }

See https://gist.github.com/tfnico/4c0fbe84bfbdffae0d7a for a more modern version using google-http-client.