pip install Spire.PDF

from spire.pdf.common import *
from spire.pdf import *
# 定義輸入和輸出文件路徑
inputFile = "/input/示例文檔.pdf"
outputFile = "/output/壓縮.pdf"
# 加載 PDF 文檔
doc = PdfDocument()
doc.LoadFromFile(inputFile)
# 禁用增量更新，確保壓縮生效
doc.FileInfo.IncrementalUpdate = False
# 設置壓縮級別為最佳壓縮
doc.CompressionLevel = PdfCompressionLevel.Best
# 再次確認禁用增量更新
doc.FileInfo.IncrementalUpdate = False
# 遍歷所有頁面，壓縮其中的圖像
imageHelper = PdfImageHelper()
for i in range(doc.Pages.Count):
    page = doc.Pages[i]
    if page is not None:
        # 獲取頁面中的所有圖像信息
        imagesInfo = imageHelper.GetImagesInfo(page)
        if len(imagesInfo) > 0:
            # 嘗試壓縮每個圖像
            for j in range(len(imagesInfo)):
                imagesInfo[j].TryCompressImage()
# 保存壓縮后的文檔
doc.SaveToFile(outputFile)
doc.Close()

from spire.pdf.common import *
from spire.pdf import *
import os
def CompressPdfFolder(input_folder: str, output_folder: str):
    """壓縮文件夾中的所有 PDF 文件"""
    # 如果輸出文件夾不存在則創(chuàng)建
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)
    # 統(tǒng)計信息
    total_original = 0
    total_compressed = 0
    # 遍歷輸入文件夾中的所有文件
    for filename in os.listdir(input_folder):
        if filename.endswith(".pdf"):
            # 構建完整的文件路徑
            input_path = os.path.join(input_folder, filename)
            output_filename = filename
            output_path = os.path.join(output_folder, output_filename)
            # 獲取原始文件大小
            original_size = os.path.getsize(input_path)
            total_original += original_size
            # 執(zhí)行壓縮
            doc = PdfDocument()
            doc.LoadFromFile(input_path)
            doc.FileInfo.IncrementalUpdate = False
            doc.CompressionLevel = PdfCompressionLevel.Best
            # 壓縮圖像
            imageHelper = PdfImageHelper()
            for i in range(doc.Pages.Count):
                page = doc.Pages[i]
                if page is not None:
                    imagesInfo = imageHelper.GetImagesInfo(page)
                    if len(imagesInfo) > 0:
                        for j in range(len(imagesInfo)):
                            imagesInfo[j].TryCompressImage()
            doc.SaveToFile(output_path)
            doc.Close()
            # 獲取壓縮后文件大小
            compressed_size = os.path.getsize(output_path)
            total_compressed += compressed_size
            # 計算壓縮率
            ratio = (1 - compressed_size / original_size) * 100
            print(f"已壓縮: {filename}")
            print(f"  原始大小: {original_size / 1024:.2f} KB")
            print(f"  壓縮后: {compressed_size / 1024:.2f} KB")
            print(f"  壓縮率: {ratio:.1f}%\n")
    # 輸出總體統(tǒng)計
    overall_ratio = (1 - total_compressed / total_original) * 100
    print("=" * 50)
    print(f"總計:")
    print(f"  原始總大小: {total_original / 1024 / 1024:.2f} MB")
    print(f"  壓縮后總大小: {total_compressed / 1024 / 1024:.2f} MB")
    print(f"  整體壓縮率: {overall_ratio:.1f}%")
# 使用示例
input_folder = "./PDF文檔"
output_folder = "./壓縮后PDF"
CompressPdfFolder(input_folder, output_folder)