java执行python获取返回值

最新推荐文章于 2025-07-27 13:40:33 发布

xiyue613

最新推荐文章于 2025-07-27 13:40:33 发布

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本文链接：https://blog.youkuaiyun.com/xiyue613/article/details/78581747

这篇博客介绍了如何在Java程序中通过dispatcher.forward方法执行Python脚本，并获取脚本执行后的返回值。在Python脚本lora_interface中，接收参数并返回字符串'111'，Java端成功获取并打印了这个返回值。

String line="";
        String reStr = "";
        try{
            String[] ars = new String[] { "python", "C:\\comm\\loraPrt.py", msgStr, commType, commCode, uCode};
            Process pr = Runtime.getRuntime().exec(ars);
            pr.waitFor();
            InputStreamReader ir = new InputStreamReader(pr.getInputStream());
            BufferedReader in = new BufferedReader(ir);
            while ((line = in.readLine()) != null) {
                reStr = line;
            }
            in.close();
            pr.waitFor();
        }catch(IOException e){
            e.printStackTrace();
        }catch(InterruptedException e){
            e.printStackTrace();
        }
        req.setAttribute("msgStr", reStr);
        RequestDispatcher dispatcher = req.getRequestDispatcher("index.jsp");    // 使用req对象获取RequestDispatcher对象

dispatcher.forward(req, res);

def lora_interface(msg, bc_type=0, area_code=0, user_code=0):
    print (msg)
    print ("ok2")
    return '111'

reStr=lora_interface(sys.argv[1], int(sys.argv[2]), int(sys.argv[3]), int(sys.argv[4]))
print (reStr)