PDF 旋转

复制import PyPDF2
from PyPDF2 import PdfReader, PdfWriter

# 打开 PDF，旋转所有页面 90 度
reader = PdfReader("input.pdf")
writer = PdfWriter()

for page in reader.pages:
    page.rotate(90)  # 顺时针旋转 90 度
    writer.add_page(page)

with open("output.pdf", "wb") as f:
    writer.write(f)

print("所有页面已旋转 90 度，保存为 output.pdf")

复制package main

import (
	"fmt"
	"github.com/pdfcpu/pdfcpu/pkg/api"
	"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
)

func main() {
	// 旋转所有页面 90 度（顺时针）
	conf := pdfcpu.NewDefaultConfiguration()
	if err := api.RotateFile("input.pdf", "output.pdf", 90, nil, conf); err != nil {
		fmt.Println("旋转失败:", err)
		return
	}
	fmt.Println("所有页面已旋转 90 度，保存为 output.pdf")
}

复制const { PDFDocument } = require('pdf-lib');
const fs = require('fs');

async function rotatePdf() {
  const pdfBytes = fs.readFileSync('input.pdf');
  const pdfDoc = await PDFDocument.load(pdfBytes);

  const pages = pdfDoc.getPages();
  pages.forEach(page => {
    page.setRotation({ angle: 90 }); // 顺时针旋转 90 度
  });

  const rotatedBytes = await pdfDoc.save();
  fs.writeFileSync('output.pdf', rotatedBytes);
  console.log('所有页面已旋转 90 度，保存为 output.pdf');
}

rotatePdf().catch(console.error);