帮我用JAVA写一段netty客户端代码的demo

好的，以下是使用Netty Java编写的简单TCP客户端示例：

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class NettyClient {
    private static final String SERVER_HOST = "localhost";
    private static final int SERVER_PORT = 8080; // 替换为你服务器的实际端口

    public static void main(String[] args) throws Exception {
        EventLoopGroup group = new NioEventLoopGroup(); // 使用NIO线程池
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(group)
                    .channel(NioSocketChannel.class) // 设置通道类型
                    .handler(new ClientHandler()); // 客户端处理器

            ChannelFuture channelFuture = bootstrap.connect(SERVER_HOST, SERVER_PORT).sync(); // 连接服务器
            System.out.println("Connected to server at " + channelFuture.channel().remoteAddress());

            // 读取数据并处理
            byte[] buffer = new byte[1024];
            while (true) {
                int length = channelFuture.channel().read(buffer);
                if (length == -1) break; // 如果读取结束则退出循环
                String receivedData = new String(buffer, 0, length); // 转换字节数组为字符串
                System.out.println("Received: " + receivedData);

                // 这里可以添加你的业务处理逻辑
            }
        } finally {
            group.shutdownGracefully(); // 关闭线程池
        }
    }

    static class ClientHandler extends ChannelInitializer<SocketChannel> {
        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            ch.pipeline().addLast(new StringDecoder()); // 解码字节到字符串
            ch.pipeline().addLast(new SimpleClientInboundHandler<String>() { // 自定义接收消息处理器
                @Override
                public void channelRead0(ChannelHandlerContext ctx, String msg) {
                    System.out.println("Received from server: " + msg);
                    // 在这里发送回复或者其他操作
                }
            });
        }
    }
}

// 相关问题:
1. 如何在Netty中处理异常?
2. 这段代码是否支持SSL加密通信?如果需要怎么做?
3. 如何在Netty中实现断点续传功能? >>