Java调用Python程序方法、Jpython使用过程

<dependency>
	<groupId>org.python</groupId>
	<artifactId>jython-standalone</artifactId>
	<version>2.7.0</version>
</dependency>

public class JpythonTest {
    public static void main(String[] args) {
        PythonInterpreter interpreter = new PythonInterpreter();
        interpreter.exec("a=[10,8,3,1,7,0]; ");
        interpreter.exec("print(sorted(a));"); //此处python语句是3.x版本的语法
        interpreter.exec("print sorted(a);"); //此处是python语句是2.x版本的语法
    }
}

def fun(a,b):
	return a*a + b*b

public class JpythonTest {
    public static void main(String[] args) {

        PythonInterpreter interpreter = new PythonInterpreter();
        interpreter.execfile("D:\\fun.py"); //fun 脚本位置

        // 第一个参数为期望获得的函数(变量)的名字，第二个参数为期望返回的对象类型
        PyFunction pyFunction = interpreter.get("fun", PyFunction.class);
        int a = 5, b = 10;

        //调用函数，如果函数需要参数，在Java中必须先将参数转化为对应的“Python类型”
        PyObject pyobj = pyFunction.__call__(new PyInteger(a), new PyInteger(b));
        System.out.println("平方和为: " + pyobj);
    }
}

import numpy as np
import sys

if __name__ == '__main__':
	a = [1,5,9,7,8,3]
	b = int(sys.argv[1])
	a.append(b)
	print("a: ",a)
	sum = np.sum(a)
	print("sum: ",sum)

public class JpythonTest {
    public static void main(String[] args) {
        try {
            // 第一个参数为本地python路径， 第二个参数为脚本路径
            String[] args1 = new String[]{"D:\\software\\python3.8\\python", "D:\\np.py"};
            Process proc = Runtime.getRuntime().exec(args1); // 执行py文件
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            String line = null;
            int index =0;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            in.close();
            proc.waitFor();

        }catch (Exception e) {
            e.printStackTrace();
        }
    }
}