java利用socket通信实现Modbus-RTU通信协议的示例代码

package hdo.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class ModBusUtils {

    public static byte[] readInputStream(InputStream inputStream) throws IOException {
        byte[] buffer = new byte[1024];
        int len = 0;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        if((len = inputStream.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        bos.close();
        return bos.toByteArray();
    }
    
    public static char byteToASCLL(byte b){
        return (char) b;
    }
   
    /*
     * 字节数组转16进制字符串
     */
    public static String bytes2HexString(byte[] b) {
        String r = "";
        for (int i = 0; i > 8) | ((crc & 0x00FF) <<8);
        return String.format("%04X", crc);
    }
 
  /**
     * 16进制表示的字符串转换为字节数组
     *
     * @param hexString 16进制表示的字符串
     * @return byte[] 字节数组
     */
    public static byte[] hexStringToByteArray(String hexString) {
        hexString = hexString.replaceAll(" ", "");
        int len = hexString.length();
        byte[] bytes = new byte[len / 2];
        for (int i = 0; i 

package hdo.utils.thread;

import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

import hdo.utils.ModBusUtils;

public class SocketServer extends Thread {

 public Map clientMap = new HashMap<>();
 
 public void run() {
        try {
            //创建socket服务端
            @SuppressWarnings("resource")
   ServerSocket server = new ServerSocket(9666);
            while (true){
                System.out.println("建立监听");
                Socket client = server.accept();
                System.out.println("建立连接");
                //获取注册包
                InputStream is = client.getInputStream();
                byte[] bytes = ModBusUtils.readInputStream(is);
                String str = "";
                for(int i=0;i

package com.ruoyi.test;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.*;

/**
 * TODO
 *
 * @author linfeng
 * @date 2021/4/13 17:50
 */
public class Service extends Thread {
    private Map clientMap = new HashMap<>();

    public Service(){
    }

    public Service(Map clientMap){
        this.clientMap=clientMap;
    }

    public void run() {
        while(true) {
            try {
                for(Map.Entry entry : clientMap.entrySet()) {
                    //注册包 节点编号
                    String registratiOnPacket= entry.getKey();
                    Socket socket = entry.getValue();
                    assert socket != null;
                    InputStream is = socket.getInputStream();
                    OutputStream os = socket.getOutputStream();
                    if (is.available() != 0) {
                        byte[] bytes = ModBusUtils.readInputStream(is);
                        String str = ModBusUtils.bytes2HexString(bytes);
                        System.out.print("十六进制：" + str);
                        //截取对应的数据
                        List floatList = new ArrayList<>();
                        String[] arr = str.split(" ");
                        if (arr.length > 20) {
                            for (int i = 7; i