在java

Question

我的问题是，在从java代码打开cmd之后，我希望用户能够像在c ++ ms dos应用程序中那样输入。当用户写道时，例如＆＃34; dir＆＃34;或者＆＃34; cd ..＆＃34;，我想用java执行这些代码。 问题是每个命令java再次重新打开cmd。我也无法执行命令。我的cmd开始代码如下;

final ArrayList<String> commands = new ArrayList<>();                

    commands.add("cmd.exe");
    commands.add("/C");
    commands.add("start");
    ProcessBuilder pb = new ProcessBuilder(commands);
    Process process = pb.start();

Answer 1

以下是How to open the command prompt and insert commands using Java?

中的一些清理代码

public static void main(String[] args) {
    try {
        String ss = null;
        Runtime obj = null;
        Process p = Runtime.getRuntime().exec("cmd.exe");


        //write a command to the output stream
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(p.getOutputStream()));
        writer.write("dir");
        writer.flush();

        //Get the input and stderror
        BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
        BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));


        System.out.println("Here is the standard output of the command:\n");
        while ((ss = stdInput.readLine()) != null) {
            System.out.println(ss);
        }

        System.out.println("Here is the standard error of the command (if any):\n");
        while ((ss = stdError.readLine()) != null) {
            System.out.println(ss);
        }

    } catch (IOException e) {
        System.out.println("FROM CATCH" + e.toString());
    }

}