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; } }