从Java调用Python（Anaconda）脚本（导入库问题）

Question

我试图从java代码调用python脚本。

public class PythonTest {
    public static void main(String[] args) throws IOException, ScriptException, InterruptedException {
        ProcessBuilder pb = new ProcessBuilder().inheritIO().command("C:/Users/emon/Anaconda3/python.exe",
                "forecast.py");
        Process process = pb.start();
        process.waitFor();
        InputStream inputStream = process.getInputStream();

        int i = 0;
        StringBuilder stringBuffer = new StringBuilder();
        while ((i = inputStream.read()) != -1) {
            stringBuffer.append((char) i);
        }
        System.out.println(stringBuffer.toString());
      }
}

from fbprophet import Prophet
import numpy as np
import pandas as pd
# import matplotlib.pyplot as plt

# plt.rcParams['figure.figsize'] = (20, 10)
# plt.style.use('ggplot')

sales_df = pd.read_csv('multiTimeline.csv')
sales_df['y_orig'] = sales_df['y']
sales_df['y'] = np.log(sales_df['y'])
model = Prophet()
model.fit(sales_df)
future_data = model.make_future_dataframe(periods=50, freq='w')
forecast_data = model.predict(future_data)
forecast_data[['ds', 'yhat', 'yhat_lower', 'yhat_upper']].tail()
model.plot(forecast_data)
print(forecast_data)

# for index, row in forecast_data.iterrows():
#     print(
#         str(index) + " " + str(row['ds']) + " " + str(np.exp(row['yhat'])) + " " + str(
#             np.exp(row['yhat_lower'])) + " " + str(np.exp(row['yhat_upper'])))

# plt.show()

Traceback (most recent call last):
  File "google-trends-service/src/main/java/com/emon/forecast.py", line 1, in <module>
    from fbprophet import Prophet
  File "C:\Users\emon\Anaconda3\lib\site-packages\fbprophet\__init__.py", line 8, in <module>
    from fbprophet.forecaster import Prophet
  File "C:\Users\emon\Anaconda3\lib\site-packages\fbprophet\forecaster.py", line 15, in <module>
    import numpy as np
  File "C:\Users\emon\Anaconda3\lib\site-packages\numpy\__init__.py", line 140, in <module>
    from . import _distributor_init
  File "C:\Users\emon\Anaconda3\lib\site-packages\numpy\_distributor_init.py", line 34, in <module>
    from. import _mklinit
ImportError: DLL load failed: The specified module could not be found.

print("Hello world")

Answer 1

我的猜测是这是一个环境问题。您的Python脚本使用的模块具有与之关联的二进制组件(DLL)。当您手动运行脚本时，您的环境以某种方式设置为查找该DLL。但是Java运行脚本的环境是不同的，DLL是找不到的。您的“Hello World”脚本运行良好，因为它不依赖于任何外部模块。

我建议你试着重新安装水蟒。