执行cmd命令

 /**
     * 执行Cmd命令方法
     *
     * @param command 相关命令
     * @return 执行结果
     */
     //   List commands 是cmd命令每个字符的集合
    public void runCommand(List<String> command) {
        ProcessBuilder builder = new ProcessBuilder(command);
        builder.redirectErrorStream(true);
        try {
            Process process = builder.start();
            final StringBuilder stringBuilder = new StringBuilder();
            final InputStream inputStream = process.getInputStream();

            new Thread(new Runnable() {//启动新线程为异步读取缓冲器，防止线程阻塞

                @Override
                public void run() {
                    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                    String line;
                    try {
                        while ((line = reader.readLine()) != null) {
                            stringBuilder.append(line);
                        }
                        reader.close();
                    } catch (IOException e) {
                        e.printStackTrace();

                    }
                }
            }).start();
            process.waitFor();
        } catch (Exception e) {
            throw new RuntimeException("ffmpeg执行异常" + e.getMessage());
        }
    }