218 lines
8.1 KiB
Python
218 lines
8.1 KiB
Python
import os
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from PyPDF2 import PdfReader, PdfWriter
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#合并PDF
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def merge_pdfs(paths, output_path):
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# 检查是否所有路径都是空字符串或仅包含空白字符
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if not any(path.strip() for path in paths):
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return ""
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pdf_writer = PdfWriter()
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last_page_text = None # 用于存储上一个PDF的最后一页的文本
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for path in paths:
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# 跳过空字符串或仅包含空白字符的路径
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if not path.strip():
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continue
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try:
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pdf_reader = PdfReader(path)
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pages = pdf_reader.pages
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start_index = 0 # 从第一页开始添加
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# 如果这不是第一个文件，并且有上一个文件的最后一页文本
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if last_page_text is not None and len(pages) > 0:
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current_first_page_text = pages[0].extract_text() or ""
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# 比较当前文件的第一页和上一个文件的最后一页的文本
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if current_first_page_text == last_page_text:
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start_index = 1 # 如果相同，跳过当前文件的第一页
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# 添加当前PDF的页面到写入器
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for page_num in range(start_index, len(pages)):
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pdf_writer.add_page(pages[page_num])
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# 更新 last_page_text 为当前PDF的最后一页的文本
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if len(pages) > 0:
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last_page_text = pages[-1].extract_text() or ""
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except Exception as e:
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print(f"文件 '{path}' 无法处理，错误: {e}")
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continue
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# 如果没有添加任何页面，返回空字符串
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if len(pdf_writer.pages) == 0:
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return ""
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# 写入合并后的PDF到文件
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try:
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with open(output_path, 'wb') as out:
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pdf_writer.write(out)
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return output_path
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except Exception as e:
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print(f"无法写入输出文件，错误: {e}")
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return ""
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def judge_file_exist(original_path, new_suffix):
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# 提取目录路径和原始文件名
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directory = os.path.dirname(original_path)
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original_filename = os.path.basename(original_path)
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# 替换文件名中的旧后缀为新后缀
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# 假设原始文件名格式为 '2-招标文件_qualification.pdf'
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# 需要替换 '_qualification' 部分为 '_qualification2'
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new_filename = original_filename.replace("_qualification1", f"_{new_suffix}")
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new_filename = new_filename.replace("_qualification2", f"_{new_suffix}")
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# 生成新的文件路径
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new_file_path = os.path.join(directory, new_filename)
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# 检查新文件是否存在
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if os.path.isfile(new_file_path):
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return new_file_path
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else:
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return None
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def merge_and_cleanup(output_pdf_path, suffix_to_merge):
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another_file_path = judge_file_exist(output_pdf_path, suffix_to_merge)
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if another_file_path:
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paths = [output_pdf_path, another_file_path] # 需要合并的 PDF 文件路径
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merge_pdfs(paths, output_pdf_path)
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os.remove(another_file_path)
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print(f"文件 {another_file_path} 已删除。")
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def find_and_merge(target_path, output_suffix):
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# 获取 target_path 所在的目录
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directory = os.path.dirname(target_path)
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full_path=""
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# 遍历目录中的所有文件，寻找以 output_suffix 结尾的文件
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for filename in os.listdir(directory):
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if filename.endswith(output_suffix):
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# 拼接目录路径和文件名，生成完整路径
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full_path = os.path.join(directory, filename)
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if not full_path:
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paths=[target_path]
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else:
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paths=[target_path,full_path]
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merge_pdfs(paths,target_path)
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def merge_selected_pdfs(output_folder, truncate_files, output_path, base_file_name, mode='engineering'):
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"""
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通用的 PDF 合并函数，根据不同的模式合并指定的文件。
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参数：
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- output_folder (str): 包含以 {base_file_name}_before.pdf 结尾的 PDF 文件的文件夹路径。
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- truncate_files (list): 包含 PDF 文件路径的列表。
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- output_path (str): 合并后的 PDF 文件保存路径。
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- base_file_name (str): 用于匹配文件名的基础名称。
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- mode (str): 合并模式，支持 'engineering' 和 'goods'。
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返回:
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- str: 如果合并成功，返回 output_path；否则，返回空字符串 ""。
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"""
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try:
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all_output_files = os.listdir(output_folder)
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except FileNotFoundError:
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print(f"输出文件夹 '{output_folder}' 未找到。")
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return ""
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except PermissionError:
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print(f"没有权限访问输出文件夹 '{output_folder}'。")
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return ""
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if mode == 'engineering':
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required_suffixes = [
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f'{base_file_name}_before.pdf',
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f'{base_file_name}_notice.pdf',
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f'{base_file_name}_tobidders_notice_table.pdf'
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]
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optional_suffixes = []
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elif mode == 'goods':
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required_suffixes = [
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f'{base_file_name}_before.pdf',
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f'{base_file_name}_notice.pdf',
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f'{base_file_name}_tobidders_notice_part1.pdf'
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]
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optional_suffixes = [
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f'{base_file_name}_tobidders_notice_part2.pdf'
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]
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else:
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print(f"未知的合并模式: {mode}")
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return ""
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all_pdfs_to_merge = []
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missing_files = []
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# 处理必需的文件
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for suffix in required_suffixes:
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if suffix == f'{base_file_name}_before.pdf':
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matching_files = [
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os.path.join(output_folder, f)
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for f in all_output_files
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if f.endswith(suffix)
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]
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else:
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matching_files = [f for f in truncate_files if f.endswith(suffix)]
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if matching_files:
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matching_files_sorted = sorted(matching_files)
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all_pdfs_to_merge.extend(matching_files_sorted)
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for f in matching_files_sorted:
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print(f"选中文件: {f}")
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else:
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print(f"没有找到以 '{suffix}' 结尾的文件。")
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missing_files.append(suffix)
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# 处理可选的文件
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for suffix in optional_suffixes:
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if suffix == f'{base_file_name}_before.pdf':
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matching_files = [
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os.path.join(output_folder, f)
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for f in all_output_files
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if f.endswith(suffix)
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]
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else:
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matching_files = [f for f in truncate_files if f.endswith(suffix)]
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if matching_files:
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matching_files_sorted = sorted(matching_files)
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all_pdfs_to_merge.extend(matching_files_sorted)
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for f in matching_files_sorted:
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print(f"选中文件: {f}")
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else:
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print(f"可选文件 '{suffix}' 未找到，继续合并。")
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# 检查是否所有必需的文件都已找到
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if missing_files:
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print("缺少以下必要的 PDF 文件，无法进行合并:")
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for missing in missing_files:
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print(f" - {missing}")
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return ""
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print(f"总共将要合并的 PDF 文件数量: {len(all_pdfs_to_merge)}")
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# 过滤掉不存在或为空的文件路径
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all_pdfs_to_merge = [f for f in all_pdfs_to_merge if os.path.isfile(f) and os.path.getsize(f) > 0]
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if not all_pdfs_to_merge:
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print("没有找到要合并的有效 PDF 文件。")
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return ""
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# 调用 merge_pdfs 函数进行合并
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try:
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merge_pdfs(all_pdfs_to_merge, output_path)
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print(f"已成功合并 PDF 文件到 '{output_path}'。")
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except Exception as e:
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print(f"合并 PDF 文件时出错: {e}")
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return ""
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# 检查合并后的文件是否存在且不为空
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if os.path.exists(output_path) and os.path.getsize(output_path) > 0:
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before_pdf_path = os.path.join(output_folder, f"{base_file_name}_before.pdf")
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if os.path.exists(before_pdf_path):
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try:
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os.remove(before_pdf_path)
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print(f"已删除文件: {before_pdf_path}")
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except Exception as e:
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print(f"删除文件 {before_pdf_path} 时出错: {e}")
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else:
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print(f"未找到要删除的文件: {before_pdf_path}")
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return output_path
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else:
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print(f"合并失败，没有生成 '{output_path}'。")
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return ""
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