无法通过java中的Streams向CMD发送命令

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class CmdCommandSender {
    public static void main(String[] args) {
        try {
            // 创建ProcessBuilder对象，并设置要执行的命令
            ProcessBuilder processBuilder = new ProcessBuilder("cmd.exe", "/c", "dir");

            // 启动子进程
            Process process = processBuilder.start();

            // 获取子进程的输出流
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));

            // 读取输出流中的内容
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }

            // 等待子进程执行完毕
            int exitCode = process.waitFor();
            System.out.println("子进程执行完毕，退出码：" + exitCode);
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}