Window环境下，Java调用Python

public static void main(String[] args) throws IOException, InterruptedException {
    String workDir = "E:/python_workspace/Python/machine_learning/forecasting";
    String[] envp = new String[]{"WORKDIR=" + workDir};
    Process exec = Runtime.getRuntime().exec("python ./run.py /c dir", envp, new File(workDir));
    BufferedReader reader = new BufferedReader(new InputStreamReader(exec.getInputStream(),"GBK"));
    String line;
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
    }
　　 //waitFor()方法目的是为了保证CMD命令执行完毕
    int ec = exec.waitFor();
    System.out.println("Process exited with code " + ec);
    reader.close();
}