java - 如何在 java 中启动并与控制台应用程序交互

Question

我有一个用 c 编写的控制台应用程序，它在控制台中运行并有自己的伪控制台。通过它，我配置了这个应用程序并运行它。一切都好。现在我试图在 Java 应用程序中运行这个应用程序，但我遇到了问题。例如，我使用 sh

ProcessBuilder builder = new ProcessBuilder("sh");
builder.redirectErrorStream(true);
Process process = builder.start();

try (BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
     BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()))) {

    bw.write("echo lol");

    while (true) {
        // System.out.println(process.isAlive());
        if (br.ready()) {
            System.out.println(br.readLine());
        }
    }
} catch (Exception ex) {
    ex.printStackTrace();
}

主要思想是在控制台中运行应用程序并向其发送多个命令。

Answer 1

所以，经过几次实验，我得到了答案。

    ProcessBuilder builder = new ProcessBuilder("sh");
    Process process = builder.start();


    BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
    new Thread(new Runnable() {
        public void run() {
            Scanner scan = new Scanner(br);
            while (true) {
                try {
                    if (!br.ready()) break;
                    System.out.println(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }
    }).start();
    PrintWriter bw = new PrintWriter(process.getOutputStream());
    bw.println("echo Hello World");
    bw.println("echo lol");
    bw.flush();
    bw.close();