【技巧】Java执行Python脚本

【技巧】Java执行Python脚本

方案一

命令行

        //执行命令  可以通过命令行方式传参
        Process exec = Runtime.getRuntime().exec("python /home/jar/demo/a.py /home/jar/demo/test.txt");
//        System.out.println(exec.);
        int i = exec.waitFor();
        BufferedReader reader=new BufferedReader(new InputStreamReader(
                exec.getInputStream()));
        String line = "";
        while((line = reader.readLine()) != null) {
            //结果
            System.out.println(line);
        }

方案二

需要依赖

        <dependency>
            <groupId>org.python</groupId>
            <artifactId>jython</artifactId>
            <version>2.7.3</version>
        </dependency>

        <!-- hutool工具类-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.20</version>
        </dependency>

        ScriptEngine pythonEngine = ScriptUtil.getPythonEngine();

        String py = "" +
                "import pandas as pd\n" +
                "print('123456')";



        Object eval = pythonEngine.eval(py);
//结果
        System.out.println(eval);