java调用python脚本并向python脚本传递参数

 

1、安装Eclipse

先安装jdk,再安装Eclipse,成功后开始建立py_java项目,在这个项目的存储目录SRC下建立test包,在test包中New-Class,新建MyDemo类,建好完成后就可以在MyDemo中写代码了

2、python脚本内容

import numpy as np
from selenium import webdriver


def main():
    url = 'https://www.tianyancha.com/login'
    driver = webdriver.Chrome()
    driver.get(url)
if __name__ == '__main__':
    a = np.ones(3)
    print(a)
    print('java 调用有第三方库的python脚本成功')
    main()

  调用了两个三方库,有输出操作和打开浏览器操作

3、MyDemo类的代码(java调用python脚本)

package test;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class MyDemo {
	
	public static void main(String[] args) { 
		try {
		   System.out.println("start");
		   String[] args1=new String[]{"python","D:\\pyworkpeace\\9_30_1.py"};
		   Process pr=Runtime.getRuntime().exec(args1);
		   
		   BufferedReader in = new BufferedReader(new InputStreamReader(
		     pr.getInputStream()));
		   String line;
		   while ((line = in.readLine()) != null) {
		    System.out.println(line);
		   }
		   in.close();
		   pr.waitFor();
		   System.out.println("end");
		  } catch (Exception e) {
		   e.printStackTrace();
		  }}
	public void test(){
		System.out.println("我的第一个方法C");
	}

}

  

4、运行结果如下所示

不光有打印窗口,而且还弹出了天眼查的浏览器,程序完成后浏览器也就关闭了

5、java动态传递参数

    这次要做的是通过java传递url给python脚本,而python脚本用浏览器打开接收到的url网页。

(1)首先定义一个url参数在java中 ;String url="http://blog.csdn.net/thorny_v/article/details/61417386";

(2)将参数传递给python;  String[] args1 = new String[] { "python", "D:\\pyworkpeace\\9_30.py", url}; 

java中其他地方完全一样 没有改动

(3)python中需要做一点小变动,重写了一下代码

import sys
from selenium import webdriver


def main(a):
    driver = webdriver.Chrome()  # 打开浏览器
    driver.get(a)  # 浏览器打开指定页面
if __name__ == '__main__':
    for i in range(1, len(sys.argv)):
        url = sys.argv[i]
        main(url)

  其中需要注意的是接收参数从sys.argv[1]开始,sys.argv[0]是python脚本的参数地址,没什么用。最后就大功告成了

//这个程序可以调用python脚本,并向python脚本中传递参数

package test;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class test_1 {
    
    public static void main(String[] args) { 
        try {
           //String a=getPara("car").substring(1),b="D34567",c="LJeff34",d="iqngfao";
           //String[] args1=new String[]{ "python", "D:\\pyworkpeace\\9_30_1.py", a, b, c, d };
           //Process pr=Runtime.getRuntime().exec(args1);
           String url="http://blog.csdn.net/thorny_v/article/details/61417386";
           System.out.println("start;"+url);
           String[] args1 = new String[] { "python", "D:\\pyworkpeace\\9_30.py", url}; 
           Process pr=Runtime.getRuntime().exec(args1);
           BufferedReader in = new BufferedReader(new InputStreamReader(
             pr.getInputStream()));
           String line;
           while ((line = in.readLine()) != null) {
            System.out.println(line);
           }
           in.close();
           pr.waitFor();
           System.out.println("end");
          } 
        catch (Exception e) {
           e.printStackTrace();
          }
        }
    private static String getPara(String string) {
        // TODO Auto-generated method stub
        return null;
    }


}
 
posted @ 2017-09-30 13:59  bethansy  阅读(55688)  评论(6编辑  收藏  举报