刚开始合并没有顺序，合并成了一个指定文件了，但排序是乱的。

import os
from PIL import Image

def folder_to_pdf(folder_path, output_path):
    image_paths = []
    for file_name in os.listdir(folder_path):
        if file_name.endswith(('jpg', 'jpeg', 'png')):
            image_paths.append(os.path.join(folder_path, file_name))
    
    if image_paths:
        images = [Image.open(image).convert('RGB') for image in sorted(image_paths)]
        images[0].save(output_path, save_all=True, append_images=images[1:])
        print(f"已将文件夹 {folder_path} 中的图片合并为 PDF 文件 {output_path}")
    else:
        print("文件夹中没有找到图片文件")

# 示例
folder_to_pdf('images_folder', 'output_folder.pdf')

第二版优化后的

实际效果还是达到了，需要的可以玩玩。

from PIL import Image

def images_to_pdf(image_paths, output_path):
    images = [Image.open(image).convert('RGB') for image in image_paths]
    images[0].save(output_path, save_all=True, append_images=images[1:])
    print(f"已将多张图片合并为 PDF 文件 {output_path}")

def generate_filenames(start, end):
    return [f"{i}.jpg" for i in range(start, end + 1)]

# 这里修改数值按照从1开始累加的方式排序
start = 1
end = 1000
image_paths = generate_filenames(start, end)
images_to_pdf(image_paths, 'output2024.pdf')