Java执行runas命令并在提示符下提供密码：“管道正在关闭错误”

Question

我想从我正在使用终端命令的Java程序中启动/停止服务。问题是我需要以使用ProcessBuilder API的管理员身份启动终端。

public void startService(String serviceName) throws IOException, InterruptedException {

    String[] cmdArray = {"cmd.exe", "/c", 
                         "runas /savecred /profile /user:admin \"sc start " + serviceName + "\""};

    Process process = new ProcessBuilder(cmdArray).start();

    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
    OutputStreamWriter output = new OutputStreamWriter(process.getOutputStream());
    String line;        

    while ((line = bufferedReader.readLine()) != null) {
        System.out.println(line); //Prints "enter the password for admin"
}
    output.write("password"); //my password
    output.newLine();
    output.flush();
    //output.wait();
    process.destroy();
  }

该命令执行正常，并打印Enter the password for admin，但是当我通过进程的输出流提供该命令时，我得到了I / O错误java.io.IOException: The pipe is being closed。我还尝试在命令前添加echo mypassword |，该命令不提示在终端输入密码，而是从Java程序提示。非常感谢您对此提供任何帮助。

编辑-我在output.flush()上遇到错误