java调python脚本总结（一）

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最近需要使用java调python脚本，总结一下；

无参调用

如果要运行，都需要本地装python环境，尽量装python2.X版本，3.0貌似部分有改动（导致脚本运行不起来），装完python环境，切入 CMD 输入python 即可测试下是否成功，然后需要在你的eclipse 配置下如图（如果是应用服务器的话在run connfig.. 中找到你运行的server ），

![这里写图片描述](http://img.blog.csdn.net/20171130093611985?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaGFvMTg3MzUwNDQ3OTE=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)

点击select 选出 path 即可（path中包含了 python的环境变量），
jython-standalone-2.7.0.jar 和jython-standalone-2.7.0源码下载

        // jython         PythonInterpreter interpreter = new PythonInterpreter();            log.info(" start exec ... ");        try {            interpreter.execfile("D:/haocs/hello.py");        } catch (Exception e) {            log.error("exec Exception ",e);        }    // java直接调用        private static final String PY_URL = "D:"+File.separator+"haocs"+File.separator+ "test.py";    public static void execPy() {        Process proc = null;        try {            proc = Runtime.getRuntime().exec("python " + PY_URL);            proc.waitFor();        } catch (IOException e) {            e.printStackTrace();        } catch (InterruptedException e) {            e.printStackTrace();        }    }

有参且有返回值

// python 解释器  仅限于方法普通参数，如果python 参数是数组则运行不了         /**         * python 脚本如下         * def adder(a, b):             *  return a + b            */        PythonInterpreter interpreter = new PythonInterpreter();        interpreter.execfile("D:\\haocs\\helloPython.py");        PyFunction func = (PyFunction) interpreter.get("adder",                PyFunction.class);        int a = 2010;        int b = 2;        PyObject pyobj = func.__call__(new PyInteger(a), new PyInteger(b));        System.out.println("result= " + pyobj.toString());// jython 数组调用python             Properties props = new Properties();              props.put("python.console.encoding", "UTF-8");              props.put("python.security.respectJavaAccessibility", "false");              props.put("python.import.site", "false");              String[] arguments ={"127.0.0.1", "demo-server","start"};              PythonInterpreter.initialize(props,System.getProperties(), arguments);              PythonInterpreter interpreter = new PythonInterpreter();              interpreter.execfile(temp);----------          // java 调用python 单个参数如下          //     String cmd="python D:\\labs\\hello.py "+name+" "+path;            //     Process pr = Runtime.getRuntime().exec(cmd);            //java 调用python 数组参数 ，            String[] args = new String[] { "python", "D:\\labs\\client.py","127.0.0.1","demo-server","start"};           //设置命令行传入参数          Process pr = Runtime.getRuntime().exec(args);          System.out.println(pr.toString());          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");

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