Python批量实现为PDF添加文字水印和图片印章

pip install spire.pdf.free

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

TITLE = PdfTrueTypeFont("Microsoft YaHei", 21.0, PdfFontStyle.Bold, True)
META = PdfTrueTypeFont("Microsoft YaHei", 10.5, PdfFontStyle.Regular, True)
HEAD = PdfTrueTypeFont("Microsoft YaHei", 14.0, PdfFontStyle.Bold, True)
BODY = PdfTrueTypeFont("Microsoft YaHei", 11.0, PdfFontStyle.Regular, True)

BLACK = PdfSolidBrush(PdfRGBColor(Color.get_Black()))
GRAY = PdfSolidBrush(PdfRGBColor(Color.get_Gray()))
RULE = PdfSolidBrush(PdfRGBColor(Color.get_Silver()))
MARGIN = 60.0

def wrap(text, per_line=38):
    return [text[i:i + per_line] for i in range(0, len(text), per_line)]

def draw_para(page, text, y, leading=20.0):
    for line in wrap(text):
        page.Canvas.DrawString(line, BODY, BLACK, MARGIN, y)
        y += leading
    return y + 8.0

SECTIONS = [
    ("一、项目背景", [
        "本方案书面向星河集团数字化转型项目，围绕业务系统上云与统一运维平台建设提出整体技术设计。项目覆盖华东、华北、华南三个区域的数据中心，计划分三个阶段实施。",
        "现有系统采用分散部署模式，各业务线独立采购服务器与存储资源，资源利用率长期低于 40%，跨系统数据交换依赖人工导表，运维成本居高不下。本项目通过统一云平台实现资源集中管理、弹性调度与自动化运维。"]),
    ("二、总体架构", [
        "平台采用两地三中心部署架构：生产中心与同城灾备中心之间通过双活链路互联，异地灾备中心承担数据归档与灾难恢复职能。核心组件包括资源调度引擎、统一存储网关与运维监控平台。",
        "资源调度引擎负责容器化业务的编排与弹性伸缩；统一存储网关对接现有 SAN 存储与对象存储，向业务系统提供统一的存储接口；运维监控平台采集主机、网络与应用的运行指标，支持自定义告警规则与值班编排。"]),
    ("三、实施计划", [
        "第一阶段完成基础环境搭建与试点业务迁移，周期三个月；第二阶段完成核心业务系统迁移与数据同步机制建设，周期六个月；第三阶段开展全量业务迁移与运维体系交接，周期三个月。",
        "各阶段均设置里程碑评审点，由项目组与业务部门共同确认迁移范围与回退方案。关键路径上的资源采购与机房改造需在项目启动前完成招标流程，避免影响整体进度。"]),
    ("四、服务保障", [
        "项目交付后提供为期一年的运维支持，包含 7×24 小时故障响应、季度巡检与配置优化服务。运维团队常驻现场两名工程师，负责日常变更操作与事件处理。",
        "平台上线后按季度出具运行报告，内容涵盖资源使用率、故障统计与容量预测，作为后续扩容决策的依据。"]),
]

# 技术方案书：首页含标题与第一节，其余小节各占一页
doc = PdfDocument()
page = doc.Pages.Add()
page.Canvas.DrawString("星河云平台技术方案书", TITLE, BLACK, MARGIN, 90.0)
page.Canvas.DrawString("文档编号：XH-2026-014    编制日期：2026-09-21    密级：内部", META, GRAY, MARGIN, 132.0)
page.Canvas.DrawRectangle(RULE, RectangleF(PointF(MARGIN, 152.0), SizeF(page.Canvas.ClientSize.Width - 2 * MARGIN, 1.2)))
y = 190.0
head, paras = SECTIONS[0]
page.Canvas.DrawString(head, HEAD, BLACK, MARGIN, y)
y += 30.0
for p in paras:
    y = draw_para(page, p, y)
for head, paras in SECTIONS[1:]:
    page = doc.Pages.Add()
    y = 90.0
    page.Canvas.DrawString(head, HEAD, BLACK, MARGIN, y)
    y += 30.0
    for p in paras:
        y = draw_para(page, p, y)
doc.SaveToFile("技术方案书.pdf")
doc.Close()

# 报价单：标题、明细表与合计
doc2 = PdfDocument()
page = doc2.Pages.Add()
page.Canvas.DrawString("项目报价单", TITLE, BLACK, MARGIN, 90.0)
page.Canvas.DrawString("报价单号：XH-QT-2026-021    日期：2026-09-21", META, GRAY, MARGIN, 132.0)
page.Canvas.DrawRectangle(RULE, RectangleF(PointF(MARGIN, 152.0), SizeF(page.Canvas.ClientSize.Width - 2 * MARGIN, 1.2)))

cols = [60.0, 115.0, 340.0, 400.0, 480.0]
headers = ["序号", "设备名称", "数量", "单价（元）", "金额（元）"]
rows = [
    ("1", "云平台管理节点", "2", "86,000", "172,000"),
    ("2", "计算节点", "12", "58,000", "696,000"),
    ("3", "分布式存储节点", "6", "92,000", "552,000"),
    ("4", "网络交换机", "8", "23,000", "184,000"),
]
TH = PdfTrueTypeFont("Microsoft YaHei", 11.0, PdfFontStyle.Bold, True)
y = 195.0
for x, h in zip(cols, headers):
    page.Canvas.DrawString(h, TH, BLACK, x, y)
page.Canvas.DrawRectangle(RULE, RectangleF(PointF(MARGIN, y + 18.0), SizeF(page.Canvas.ClientSize.Width - 2 * MARGIN, 1.2)))
y += 36.0
for row in rows:
    for x, v in zip(cols, row):
        page.Canvas.DrawString(v, BODY, BLACK, x, y)
    y += 28.0
page.Canvas.DrawRectangle(RULE, RectangleF(PointF(MARGIN, y + 2.0), SizeF(page.Canvas.ClientSize.Width - 2 * MARGIN, 1.2)))
y += 20.0
page.Canvas.DrawString("合计金额", TH, BLACK, 400.0, y)
page.Canvas.DrawString("1,604,000", TH, BLACK, 480.0, y)
y += 48.0
page.Canvas.DrawString("本报价含三年原厂质保，报价有效期 30 天。", META, GRAY, MARGIN, y)
doc2.SaveToFile("报价单.pdf")
doc2.Close()

PHRASE = "内部资料 禁止外传"
FONT = PdfTrueTypeFont("Microsoft YaHei", 22.0, PdfFontStyle.Regular, True)
BRUSH = PdfSolidBrush(PdfRGBColor(Color.get_DarkRed()))
def add_text_watermark(pdf_path, out_path, phrase, font, brush, opacity=0.22, angle=-30.0):
    doc = PdfDocument()
    doc.LoadFromFile(pdf_path)
    for i in range(doc.Pages.Count):
        page = doc.Pages[i]
        tile = PdfTilingBrush(SizeF(page.Canvas.ClientSize.Width / 2.0, page.Canvas.ClientSize.Height / 3.0))
        g = tile.Graphics
        g.SetTransparency(opacity)
        g.Save()
        g.TranslateTransform(tile.Size.Width / 2.0, tile.Size.Height / 2.0)
        g.RotateTransform(angle)
        g.DrawString(phrase, font, brush, 0.0, 0.0, PdfStringFormat(PdfTextAlignment.Center))
        g.Restore()
        g.SetTransparency(1.0)
        page.Canvas.DrawRectangle(tile, RectangleF(PointF(0.0, 0.0), page.Canvas.ClientSize))
    n = doc.Pages.Count
    doc.SaveToFile(out_path)
    doc.Close()
    return n
add_text_watermark("技术方案书.pdf", "技术方案书_文字水印.pdf", PHRASE, FONT, BRUSH)

LOGO = "水印素材_星河科技.png"

doc = PdfDocument()
doc.LoadFromFile("技术方案书.pdf")
pdf_image = PdfImage.FromFile(LOGO)
for i in range(doc.Pages.Count):
    page = doc.Pages[i]
    w = page.Canvas.ClientSize.Width * 0.62
    h = w * pdf_image.Height / pdf_image.Width
    x = (page.Canvas.ClientSize.Width - w) / 2.0
    y = (page.Canvas.ClientSize.Height - h) / 2.0
    page.Canvas.Save()
    page.Canvas.SetTransparency(0.16, 0.16, PdfBlendMode.Multiply)
    page.Canvas.DrawImage(pdf_image, x, y, w, h)
    page.Canvas.Restore()
doc.SaveToFile("技术方案书_图片印章.pdf")
doc.Close()

import os

OUT_DIR = "批量输出"
os.makedirs(OUT_DIR, exist_ok=True)

FILES = ["技术方案书.pdf", "报价单.pdf"]

for name in FILES:
    n = add_text_watermark(name, os.path.join(OUT_DIR, name), PHRASE, FONT, BRUSH)
    print("已处理: %s -> 批量输出/（%d 页）" % (name, n))

print("批量处理完成，共 %d 个文件。" % len(FILES))