Java ProcessBuilder 无法读取 script.py

问题描述

我有一个名为 Convertor.py 的 python 脚本，它读取 pdf 文件并使用 pdf2image 库将其转换为图像。 当我在 Pycharm 中执行此脚本时，它工作正常。当我尝试在我的 Java 代码中执行它时，它给了我以下错误：

Traceback (most recent call last):
  File "C:\Users\lenovo\anaconda3\envs\tensorflow2.4\lib\site-packages\pdf2image\pdf2image.py",line 466,in pdfinfo_from_path
    raise ValueError
ValueError

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "C:\Users\lenovo\PycharmProjects\SoftOCR_PFE\Convertor.py",line 16,in <module>
    convert('PDF/laimp2-elect.pdf')
  File "C:\Users\lenovo\PycharmProjects\SoftOCR_PFE\Convertor.py",line 7,in convert
    pages = convert_from_path(f'{file}',500,poppler_path=r"C:\Program Files\poppler-21.03.0\Library\bin")
  File "C:\Users\lenovo\anaconda3\envs\tensorflow2.4\lib\site-packages\pdf2image\pdf2image.py",line 97,in convert_from_path
    page_count = pdfinfo_from_path(pdf_path,userpw,poppler_path=poppler_path)["Pages"]
  File "C:\Users\lenovo\anaconda3\envs\tensorflow2.4\lib\site-packages\pdf2image\pdf2image.py",line 475,in pdfinfo_from_path
    raise pdfpageCountError(
pdf2image.exceptions.pdfpageCountError: Unable to get page count.
I/O Error: Couldn't open file 'PDF/laimp2-elect.pdf': No error.

Python 代码如下所示：

from pdf2image import convert_from_path
import os


def convert(file):
    pages = convert_from_path(f'{file}',poppler_path=r"C:\Program Files\poppler-21.03.0\Library\bin")
    i = 0
    for page in pages:
        i += 1
        if not os.path.exists(rf'C:\Users\lenovo\Documents\NetBeansprojects\SoftOcrPfe\SoftOcr\images\Images'):
            os.mkdir(rf'C:\Users\lenovo\Documents\NetBeansprojects\SoftOcrPfe\SoftOcr\images\Images')
        page.save(rf'C:\Users\lenovo\Documents\NetBeansprojects\SoftOcrPfe\SoftOcr\images\Images\out{i}.png','PNG')


convert('PDF/laimp2-elect.pdf')

这是用来执行 Convertor.py 的 processbuilder 代码

ProcessBuilder pb = new ProcessBuilder("C:\\Users\\lenovo\\anaconda3\\envs\\tensorflow2.4\\python.exe","C:\\Users\\lenovo\\PycharmProjects\\SoftOCR_PFE\\Convertor.py");

        pb.redirectErrorStream(true);
        Process proc = null;
        try {
            proc = pb.start();
        } catch (IOException ex) {
            Logger.getLogger(Frame.class.getName()).log(Level.SEVERE,null,ex);
        }

        Reader reader = new InputStreamReader(proc.getInputStream());
        BufferedReader bf = new BufferedReader(reader);
        String s;
        try {
            while ((s = bf.readLine()) != null) {
                System.out.println(s);

我拼命地尝试将 poppler 的 bin 文件夹路径添加到环境变量中，但仍然没有运气。

解决方法

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