java - 如何使用Runtime在java中调用python程序

Question

我想使用来自 java 的参数调用 python 程序。但我的输出是空白的。代码在这里。

Python 代码在这里:

import sys

print(sys.argv[1])

java代码在这里:

public class PrintNumber{
    public static void main(String[] args){
        Process proc;
        try {
            proc = Runtime.getRuntime().exec("python ../pythonProgram/pythonProgram/PrintN.py 30");
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            in.close();
            proc.waitFor();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }   
}

我想输出30，有人能告诉我错在哪里吗？

Answer 1

你可以尝试一下:

String command = "python /c start python ../pythonProgram/pythonProgram/PrintN.py";

int param = 30;

proc = Runtime.getRuntime().exec(command + param);

引用:Run Python script by Java