Java 获取串口列表 不用任何第三方组件

package com.zh.client.serial.utils;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/
  获取com端口，windows专用
 /
public class ComPortScanUtil {
    public static List<String> getComPorts() {
        List<String> ports = new ArrayList<>();
        try {
            String command = "reg query HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM";
            Process process = Runtime.getRuntime().exec(command);
            InputStream in = process.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(in));
            String line;
            int index = 0;
            while ((line = br.readLine()) != null) {
                if (line == null || "".equals(line)) {
                    continue;
                }
                if (index != 0) {
                    String[] strs = line.replaceAll(" +", ",").split(",");
                    String comPort = strs[strs.length - 1];
                    ports.add(comPort);
                }
                index++;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ports;
    }
    public static void main(String[] args) {
        System.out.println(getComPorts());
    }
}