我想使用"PythonInterpreter"从Java调用python模块中的函数,这是我的Java代码

PythonInterpreter interpreter = new PythonInterpreter();

interpreter.exec("import sys\nsys.path.append('C:\\Python27\\Lib\\site-packages')\nimport helloworld");

PyObject someFunc = interpreter.get("helloworld.getName");

PyObject result = someFunc.__call__();

String realResult = (String) result.__tojava__(String.class);

System.out.println(realResult);

和Python代码(helloworld.py)如下:

    from faker import Factory
    fake = Factory.create()

    def getName():
       name = fake.name()
       return name  

我遇到的问题是当我返回一个null PyObject时我正在调用interpreter.get.

知道出了什么问题吗？从IDLE可以很好地运行python代码

编辑

我刚刚对代码进行了一些更改,如下所示

PythonInterpreter interpreter = new PythonInterpreter();

interpreter.exec("import sys\nsys.path.append('C:\\Python27\\Lib\\site-packages')\nimport helloworld");


PyInstance wrapper = (PyInstance)interpreter.eval("helloworld" + "(" + ")");  

PyObject result = wrapper.invoke("getName()");

String realResult = (String) result.__tojava__(String.class);

System.out.println(realResult);

我在我的python模块中引入了一个类

from faker import Factory

class helloworld:

def init(self):
    fake = …

我java.lang.IllegalStateException: Already connected在尝试运行以执行HTTPS GET请求时遇到异常HttpsURLConnection API.

请在下面找到代码:

HttpsURLConnection con = null;

    try {
        URL obj = new URL(url);
        con = (HttpsURLConnection) obj.openConnection();

        con.setRequestMethod("GET");
        con.setRequestProperty("Authorization", header);
        con.setRequestProperty ("Content-Type", "application/x-www-form-urlencoded");
        String urlParameters = "schema=1.0&form=json&byBillingAccountId={EQUALS,cesar@abc.org}";

        con.setDoOutput(true);

        DataOutputStream wr = new DataOutputStream(con.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        int responseCode = con.getResponseCode();

        System.out.println("Response Code = " + responseCode);

        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close(); …