如何强制netty服务器通过TLS 1.2进行通信？

SslContext sslContext = SslContextBuilder.forServer(keyCertChainFile, keyFile)
    .protocols("TLSv1.2")
    .build();

ServerBootstrap bootstrap = new ServerBootstrap();
bootstrap.group(bossGroup, workerGroup)
    .channel(NioServerSocketChannel.class)
    .childHandler(new ChannelInitializer<SocketChannel>() {
        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            ChannelPipeline pipeline = ch.pipeline();
            // 添加其他的处理器
            pipeline.addLast(sslContext.newHandler(ch.alloc()));
            // 添加其他的处理器
        }
    });