import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class Test2 {

    public static void main(String[] args) throws IOException, InterruptedException {

        System.out.println("start python");

        //需传入的参数

       // String a = "aaa", b = "bbb", c = "cccc", d = "dddd";

        //设置命令行传入的参数

        String[] arg = new String[]{"python", "pyfile/detect.py"};

        Process process = Runtime.getRuntime().exec(arg);

        BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));

        String line;  

        while ((line = in.readLine()) != null) {

            line = decodeUnicode(line);

            System.out.println(line);

        }

        in.close();

        System.out.println("end");

        process.waitFor();

    }

}

String path = "data/shell.sh";

String[] cmd = { "sh", "-c", "ls > ”+path };

Runtime.getRuntime().exec(cmd);