Python实现控制PDF页面大小、页边距、页面方向与缩放

pip install Spire.Pdf

# 假设 page 是已获取的页面对象
scale = 1.2  # 放大1.2倍
width = float(page.Size.Width * scale)
height = float(page.Size.Height * scale)
new_size = SizeF(width, height)
# 应用新尺寸创建页面，边距设为 0.0
new_page = new_doc.Pages.Add(new_size, PdfMargins(0.0))

# 推荐写法：创建对象后单独赋值
margins = PdfMargins()
margins.Left = 50.0
margins.Top = 100.0
margins.Right = 50.0
margins.Bottom = 100.0

# 将边距应用到新创建的 A4 页面
new_page = new_doc.Pages.Add(PdfPageSize.A4(), margins)

# 将页面设为 A3 标准尺寸，设置统一边距 100.0
new_page = new_doc.Pages.Add(PdfPageSize.A3(), PdfMargins(100.0))

# 缩放画布以适配内容（例如将内容缩小为原来的 90%）
new_page.Canvas.ScaleTransform(0.9, 0.9)

# 设置参数：A3纸张、统一边距50.0、0度旋转、横向布局
new_page = new_doc.Pages.Add(PdfPageSize.A3(), 
                             PdfMargins(50.0), 
                             PdfPageRotateAngle.RotateAngle0, 
                             PdfPageOrientation.Landscape)

from spire.pdf.common import *
from spire.pdf import *

def create_pdf_with_custom_settings():
    # 1. 创建一个新的 PDF 文档对象
    new_doc = PdfDocument()

    # 设置一个通用的字体（确保系统中存在该字体，或使用 PdfFontFamily）
    font = PdfTrueTypeFont("Arial", 16.0, PdfFontStyle.Bold, True)

    # --- 场景一：自定义页面大小与特定边距 ---
    custom_size = SizeF(600.0, 800.0)
    margins_1 = PdfMargins()
    margins_1.Left = 50.0
    margins_1.Top = 100.0
    margins_1.Right = 50.0
    margins_1.Bottom = 100.0
    
    page_1 = new_doc.Pages.Add(custom_size, margins_1)
    page_1.Canvas.DrawString("Page 1: Custom Size and Margins", font, PdfBrushes.get_Black(), 10.0, 10.0)

    # --- 场景二 & 三：标准 A3 纸张与内容缩放控制 ---
    page_2 = new_doc.Pages.Add(PdfPageSize.A3(), PdfMargins(100.0))
    page_2.Canvas.ScaleTransform(1.5, 1.5)
    page_2.Canvas.DrawString("Page 2: Standard A3 with ScaleTransform", font, PdfBrushes.get_Red(), 10.0, 10.0)

    # --- 场景四：修改纸张方向为横向 ---
    page_3 = new_doc.Pages.Add(PdfPageSize.A3(), PdfMargins(50.0), 
                                PdfPageRotateAngle.RotateAngle0, 
                                PdfPageOrientation.Landscape)
    page_3.Canvas.DrawString("Page 3: A3 Landscape Orientation", font, PdfBrushes.get_Blue(), 10.0, 10.0)

    # --- 场景五：默认标准 A4 页面 ---
    page_4 = new_doc.Pages.Add()
    page_4.Canvas.DrawString("Page 4: Default A4 Settings", font, PdfBrushes.get_Green(), 10.0, 10.0)

    # 4. 保存生成的文档
    output_path = "E:/Administrator/Python1/output/CreatePdfSettings.pdf"
    new_doc.SaveToFile(output_path)
    new_doc.Close()
    print(f"PDF 已成功创建至: {output_path}")

if __name__ == "__main__":
    create_pdf_with_custom_settings()