1. demo1

@Test  public void testProcessBuilder() {    ProcessBuilder processBuilder = new ProcessBuilder();//    processBuilder.command("ping","127.0.0.1");    processBuilder.command("ipconfig");    //将标准输入流和错误输入流合并，通过标准输入流读取信息    processBuilder.redirectErrorStream(true);    try {      //启动进程      Process start = processBuilder.start();      //获取输入流      InputStream inputStream = start.getInputStream();      //转成字符输入流      InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "gbk");      int len = -1;      char[] c = new char[1024];      StringBuffer outputString = new StringBuffer();      //读取进程输入流中的内容      while ((len = inputStreamReader.read(c)) != -1) {        String s = new String(c, 0, len);        outputString.append(s);        System.out.print(s);      }      inputStream.close();    } catch (IOException e) {      e.printStackTrace();    }  }

2. demo02

@Test  public void testFFmpeg() {    ProcessBuilder processBuilder = new ProcessBuilder();    //定义命令内容    List command = new ArrayList<>();    command.add("D:/program/ffmpeg-20191229-e20c6d9-win64-static/bin/ffmpeg.exe");    command.add("-i");    command.add("D:/test/video/1.avi");    command.add("-y");//覆盖输出文件    command.add("-c:v");    command.add("libx264");    command.add("-s");    command.add("1280x720");    command.add("-pix_fmt");    command.add("yuv420p");    command.add("-b:a");    command.add("63k");    command.add("-b:v");    command.add("753k");    command.add("-r");    command.add("18");    command.add("D:/test/video/1.mp4");    processBuilder.command(command);    //将标准输入流和错误输入流合并，通过标准输入流读取信息    processBuilder.redirectErrorStream(true);    try {      //启动进程      Process start = processBuilder.start();      //获取输入流      InputStream inputStream = start.getInputStream();      //转成字符输入流      InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "gbk");      int len = -1;      char[] c = new char[1024];      StringBuffer outputString = new StringBuffer();      //读取进程输入流中的内容      while ((len = inputStreamReader.read(c)) != -1) {        String s = new String(c, 0, len);        outputString.append(s);        System.out.print(s);      }      inputStream.close();    } catch (IOException e) {      e.printStackTrace();    }  }