流程需要重定向输入

ProcessBuilder pb = new ProcessBuilder("prog.exe");Process p = pb.start();OutputStream pos = p.getOutputStream();InputStream fis = new FileInputStream("file.txt");byte[] buffer = new byte[1024];int read = 0;while((read = fis.read(buffer)) != -1) {    pos.write(buffer, 0, read);}fis.close();

未经测试，但类似的东西应该起作用。