Springboot整合netty串口

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SpringNettyApplication.java

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package me;

import io.netty.channel.ChannelFuture;
import me.server.RxServer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class SpringNettyApplication implements CommandLineRunner {


    @Autowired
    private RxServer rxServer;

    public static void main(String[] args) {
        SpringApplication.run(SpringNettyApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        ChannelFuture future = rxServer.run();
        Runtime.getRuntime().addShutdownHook(new Thread(){
            @Override
            public void run() {
                rxServer.destroy();
            }
        });
        future.channel().closeFuture().syncUninterruptibly();
    }
}

server/RxServer.java

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package me.server;


import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFactory;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.oio.OioEventLoopGroup;
import io.netty.channel.rxtx.RxtxChannel;
import io.netty.channel.rxtx.RxtxChannelConfig;
import io.netty.channel.rxtx.RxtxDeviceAddress;
import lombok.extern.slf4j.Slf4j;
import lombok.var;
import me.handler.RxtxClientHandler;
import org.springframework.stereotype.Component;


@Slf4j
@Component
public class RxServer {

    static OioEventLoopGroup group = new OioEventLoopGroup();
    private static RxtxChannel channel;

    public ChannelFuture run(){
        ChannelFuture future = null;
        var bootstrap = new Bootstrap();
        try {
            bootstrap.group(group).channelFactory(new ChannelFactory<RxtxChannel>() {
                public RxtxChannel newChannel() {
                    return channel;
                }
            })
                    .handler(new ChannelInitializer<RxtxChannel>() {
                        @Override
                        protected void initChannel(RxtxChannel ch) throws Exception {
                            ch.pipeline().addLast(
    //                                new LineBasedFrameDecoder(32768),
    //                                new StringEncoder(),
    //                                new StringDecoder(),
                                    new RxtxClientHandler()
                            );

                        }
                    });
            channel = new RxtxChannel();
            channel.config().setBaudrate(9600)
                    .setDatabits(RxtxChannelConfig.Databits.DATABITS_8)
                    .setParitybit(RxtxChannelConfig.Paritybit.NONE)
                    .setStopbits(RxtxChannelConfig.Stopbits.STOPBITS_1);
            future = bootstrap.connect(new RxtxDeviceAddress("COM8")).sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            group.shutdownGracefully();
        }
        return future;
    }

    public void destroy() {
        log.info("Shutdown Netty rx...");
        if(channel != null) { channel.close();}
        group.shutdownGracefully();
        log.info("Shutdown Netty rx Success!");
    }
}

handler/RxtxClientHandler.java

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/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package me.handler;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import lombok.extern.slf4j.Slf4j;


@Slf4j
public class RxtxClientHandler extends SimpleChannelInboundHandler<ByteBuf> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, ByteBuf o) throws Exception {

        byte[] req = new byte[o.readableBytes()];
        // 从里面读取数据，这里面的数据是16进制的，0x..
        o.readBytes(req);

        log.info(req.toString());

//         将hex解码成String
//        System.out.println(new String(req));
//        // 十六进制转换字符串，没有解码
//        String str = HexUtil.encodeHexStr(req);
//        System.out.println(str);
    }
}

GitHub地址：https://github.com/zzzzzzzs/SpringbootIntegration