如何将字符串输入发送到 ProcessBuilder

Question

class envir {
    public void run() throws IOException {
        ProcessBuilder builder = new ProcessBuilder("bash");
        builder.redirectInput(ProcessBuilder.Redirect.PIPE);
        builder.redirectOutput(ProcessBuilder.Redirect.PIPE);
        builder.redirectErrorStream(true);
        Process process = builder.start();
        System.out.println(process.getInputStream());
    }
}

如何才能发送一个字符串作为我的流程构建器的输入，以自动执行也使用线程的 cli（例如 env python3）？

如果您需要更多信息，请询问；我不擅长措辞这些问题。

Answer 1

Process 的流名称令人困惑。你真正想要的是 output stream:

public abstract OutputStream getOutputStream()

Returns the output stream connected to the normal input of the subprocess.

所以：

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(process.getOutputStream(), StandardCharsets.UTF_8));

然后写入：

bw.write("Your string");
bw.newLine();

如何将字符串输入发送到 ProcessBuilder

how to send stringed input into ProcessBuilder

java

multithreading

pipe