python -m venv pdf_rotate_env
# Windows激活
.\pdf_rotate_env\Scripts\activate
# macOS/Linux激活
source pdf_rotate_env/bin/activate

pip install spire.pdf  # 或 pip install PyPDF2

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

def rotate_single_page(input_path, output_path, page_index, angle):
    doc = PdfDocument()
    try:
        doc.LoadFromFile(input_path)
        if page_index < 0 or page_index >= doc.Pages.Count:
            print(f"錯誤：頁面索引{page_index}超出范圍（共{doc.Pages.Count}頁）")
            return
        
        page = doc.Pages[page_index]
        angle_map = {
            90: PdfPageRotateAngle.RotateAngle90,
            180: PdfPageRotateAngle.RotateAngle180,
            270: PdfPageRotateAngle.RotateAngle270
        }
        
        if angle in angle_map:
            page.Rotation = angle_map[angle]
        else:
            print("僅支持90/180/270度旋轉(zhuǎn)")
            return
            
        doc.SaveToFile(output_path)
        print(f"成功旋轉(zhuǎn)第{page_index+1}頁并保存為{output_path}")
    except Exception as e:
        print(f"處理失?。簕e}")
    finally:
        doc.Close()

# 示例：旋轉(zhuǎn)sample.pdf的第2頁180度
rotate_single_page("sample.pdf", "rotated_page.pdf", 1, 180)

def rotate_incrementally(input_path, output_path, page_index):
    doc = PdfDocument()
    try:
        doc.LoadFromFile(input_path)
        if page_index < 0 or page_index >= doc.Pages.Count:
            return
            
        page = doc.Pages[page_index]
        current = page.Rotation.value  # 獲取當(dāng)前角度值（0-3）
        new_angle = (current + 1) % 4  # 計算新角度（0→1→2→3→0循環(huán)）
        
        angle_map = {
            0: PdfPageRotateAngle.RotateAngle0,
            1: PdfPageRotateAngle.RotateAngle90,
            2: PdfPageRotateAngle.RotateAngle180,
            3: PdfPageRotateAngle.RotateAngle270
        }
        page.Rotation = angle_map[new_angle]
        
        doc.SaveToFile(output_path)
        print(f"第{page_index+1}頁從{current*90}°旋轉(zhuǎn)到{new_angle*90}°")
    except Exception as e:
        print(f"處理失?。簕e}")
    finally:
        doc.Close()

# 示例：將第1頁順時針旋轉(zhuǎn)90度（無論當(dāng)前角度如何）
rotate_incrementally("sample.pdf", "increment_rotated.pdf", 0)

from PyPDF2 import PdfReader, PdfWriter

def rotate_with_pypdf2(input_path, output_path, page_index, angle):
    reader = PdfReader(input_path)
    writer = PdfWriter()
    
    if page_index < 0 or page_index >= len(reader.pages):
        print("頁面索引錯誤")
        return
        
    page = reader.pages[page_index]
    page.rotate(angle)  # 直接旋轉(zhuǎn)（角度需為90的倍數(shù)）
    writer.add_page(page)
    
    with open(output_path, "wb") as f:
        writer.write(f)
    print(f"使用PyPDF2旋轉(zhuǎn)第{page_index+1}頁完成")

# 示例：旋轉(zhuǎn)第3頁90度
rotate_with_pypdf2("sample.pdf", "pypdf2_rotated.pdf", 2, 90)

def batch_rotate_all(input_path, output_path, angle):
    doc = PdfDocument()
    try:
        doc.LoadFromFile(input_path)
        for i in range(doc.Pages.Count):
            page = doc.Pages[i]
            if angle == 90:
                page.Rotation = PdfPageRotateAngle.RotateAngle90
            elif angle == 180:
                page.Rotation = PdfPageRotateAngle.RotateAngle180
            elif angle == 270:
                page.Rotation = PdfPageRotateAngle.RotateAngle270
        doc.SaveToFile(output_path)
        print(f"全部{doc.Pages.Count}頁旋轉(zhuǎn)完成")
    except Exception as e:
        print(f"處理失?。簕e}")
    finally:
        doc.Close()

# 示例：將整個文檔旋轉(zhuǎn)90度
batch_rotate_all("sample.pdf", "all_rotated.pdf", 90)

def smart_rotate_mixed(input_path, output_path):
    doc = PdfDocument()
    try:
        doc.LoadFromFile(input_path)
        for i in range(doc.Pages.Count):
            page = doc.Pages[i]
            current = page.Rotation.value
            # 假設(shè)我們需要所有頁面為0度（縱向）
            if current != 0:
                page.Rotation = PdfPageRotateAngle.RotateAngle0
        doc.SaveToFile(output_path)
        print("已統(tǒng)一所有頁面方向")
    except Exception as e:
        print(f"處理失?。簕e}")
    finally:
        doc.Close()

# 示例：將所有頁面強制設(shè)為縱向
smart_rotate_mixed("mixed_pages.pdf", "unified_pages.pdf")

doc = PdfDocument()
doc.LoadFromFile("large_file.pdf", FileFormat.Automatic, PdfDocumentLoadMode.Deferred)

def rotate_with_metadata(input_path, output_path, page_index, angle):
    doc = PdfDocument()
    try:
        doc.LoadFromFile(input_path)
        # 保存原始文檔信息
        info = doc.DocumentInformation.Clone()
        
        # 執(zhí)行旋轉(zhuǎn)操作...
        if 0 <= page_index < doc.Pages.Count:
            page = doc.Pages[page_index]
            # 設(shè)置旋轉(zhuǎn)角度...
            
        # 恢復(fù)元數(shù)據(jù)
        doc.DocumentInformation = info
        doc.SaveToFile(output_path)
    except Exception as e:
        print(f"處理失?。簕e}")
    finally:
        doc.Close()

from spire.pdf.security import *

def rotate_encrypted_pdf(input_path, output_path, page_index, angle, password):
    doc = PdfDocument()
    try:
        # 加載加密文件
        load_option = PdfLoadOptions()
        load_option.Password = password
        doc.LoadFromFile(input_path, load_option)
        
        # 執(zhí)行旋轉(zhuǎn)...
        if 0 <= page_index < doc.Pages.Count:
            page = doc.Pages[page_index]
            # 設(shè)置旋轉(zhuǎn)角度...
            
        doc.SaveToFile(output_path)
    except Exception as e:
        print(f"處理失敗：{e}")
    finally:
        doc.Close()

# 示例：旋轉(zhuǎn)加密PDF的第1頁
rotate_encrypted_pdf("encrypted.pdf", "decrypted_rotated.pdf", 0, 90, "your_password")

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

class PDFRotator:
    def __init__(self):
        self.doc = PdfDocument()
    
    def load_pdf(self, file_path):
        try:
            self.doc.LoadFromFile(file_path)
            print(f"成功加載文件：{file_path}")
            return True
        except Exception as e:
            print(f"加載失?。簕e}")
            return False
    
    def rotate_page(self, page_index, angle):
        if 0 <= page_index < self.doc.Pages.Count:
            angle_map = {
                90: PdfPageRotateAngle.RotateAngle90,
                180: PdfPageRotateAngle.RotateAngle180,
                270: PdfPageRotateAngle.RotateAngle270
            }
            if angle in angle_map:
                self.doc.Pages[page_index].Rotation = angle_map[angle]
                return True
        return False
    
    def save_pdf(self, output_path):
        try:
            self.doc.SaveToFile(output_path)
            print(f"文件已保存至：{output_path}")
            return True
        except Exception as e:
            print(f"保存失?。簕e}")
            return False
    
    def close(self):
        self.doc.Close()

# 使用示例
if __name__ == "__main__":
    rotator = PDFRotator()
    if rotator.load_pdf("input.pdf"):
        # 旋轉(zhuǎn)第1頁90度，第3頁180度
        rotator.rotate_page(0, 90)
        rotator.rotate_page(2, 180)
        
        # 保存結(jié)果
        output_path = "output_rotated.pdf"
        if rotator.save_pdf(output_path):
            print("處理完成！")
        rotator.close()