springboot+netty单客户端连接多个不同的服务端

可以使用Netty的Bootstrap和EventLoopGroup来实现单客户端连接多个不同的服务端。

创建Bootstrap对象并设置EventLoopGroup。

Bootstrap b = new Bootstrap();
EventLoopGroup group = new NioEventLoopGroup();
b.group(group);

设置客户端的Channel类型和Handler。

b.channel(NioSocketChannel.class);
b.handler(new MyClientInitializer());

创建多个InetSocketAddress对象，代表不同的服务端地址和端口。

InetSocketAddress addr1 = new InetSocketAddress("localhost", 8081);
InetSocketAddress addr2 = new InetSocketAddress("localhost", 8082);

循环连接不同的服务端。

for (InetSocketAddress addr : addrs) {
    ChannelFuture f = b.connect(addr).sync();
    f.channel().closeFuture().sync();
}

完整示例代码：

public class MyClient {
    public static void main(String[] args) throws Exception {
        Bootstrap b = new Bootstrap();
        EventLoopGroup group = new NioEventLoopGroup();
        b.group(group);
        b.channel(NioSocketChannel.class);
        b.handler(new MyClientInitializer());
        InetSocketAddress addr1 = new InetSocketAddress("localhost", 8081);
        InetSocketAddress addr2 = new InetSocketAddress("localhost", 8082);
        InetSocketAddress[] addrs = new InetSocketAddress[] {addr1, addr2};
        for (InetSocketAddress addr : addrs) {
            ChannelFuture f = b.connect(addr).sync();
            f.channel().closeFuture().sync();
        }
        group.shutdownGracefully();
    }
}

其中，MyClientInitializer是自定义的ChannelInitializer，用于设置客户端的Handler。可以根据具体的业务需求来自定义Handler