Java调用Python

1. 在命令行中调

TestCallPython.java

package com.brown;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class TestCallPython {

    public static void main(String[] args) {

        try {
            int number1 = 10;
            int number2 = 32;

            ProcessBuilder processBuilder = new ProcessBuilder("python", "C:/test.py", "" + number1, "" + number2);
            Process progress = processBuilder.start();

            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(progress.getInputStream()));
            int result = new Integer(bufferedReader.readLine()).intValue();
            System.out.println("value is : " + result);
        } catch (Exception e) {
            // TODO: handle exception
        }

    }
}

C:\test.py

import sys

print(int(sys.argv[1])+int(sys.argv[2]))

注意：
这种方式只能接收到python里print的数据。所以如果你需要返回值，可以把返回值打印出来；可能返回值里面有日志等你不需要的数据，你只需把你需要的返回值放在print结果的最后一行，然后读取最后一行。下面是读取返回值(最后一行)的代码：

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(progress.getInputStream()));
Stream<String> stream = bufferedReader.lines();
List<Object> lines = stream.collect(Collectors.toList());
String result = lines.get(lines.size()-1).toString();

2. 使用Jython

http://blog.youkuaiyun.com/xingjiarong/article/details/49424253