HTML 5 WebSocket 示例

作者：88250
时间：2010 年 1 月 1 日
     我们通过一个简单的例子来熟悉 HTML 5 WebSocket。该例子服务端从 0 开始每秒递增一个整数并发送给客户端浏览器显示。准备：下载 Jetty 7 ，Java Web 开发环境，Chrome 4+ 。
服务端 Java 代码：
final public class CounterSocketServlet extends WebSocketServlet {
    @Override
    protected WebSocket doWebSocketConnect(final HttpServletRequest hsr,
                                           final String string) {
        return new CounterSocket();
    }
    final class CounterSocket implements WebSocket {
        private Outbound outbound;
        public void onConnect(final Outbound outbound) {
            System.out.println("onConnect");
            this.outbound = outbound;
        }
        public void onMessage(final byte frame, final String data) {
            System.out.println("onMessage");
            if (data.equals("Hello, Server!")) {
                new Thread() {
                    @Override
                    public void run() {
      &nbs