1import base64
2from PIL import Image
3from io import BytesIO
4
5# 将图像文件转换为 base64
6def image_to_base64(image_path):
7    with open(image_path, "rb") as image_file:
8        encoded_string = base64.b64encode(image_file.read())
9        return encoded_string.decode('utf-8')
10
11# 将 base64 转换为图像并保存
12def base64_to_image(base64_string, output_path):
13    # 如果存在数据 URL 前缀，则移除
14    if ',' in base64_string:
15        base64_string = base64_string.split(',')[1]
16    
17    image_data = base64.b64decode(base64_string)
18    image = Image.open(BytesIO(image_data))
19    image.save(output_path)
20
21# 示例用法
22base64_str = image_to_base64("input.jpg")
23print(f"data:image/jpeg;base64,{base64_str[:30]}...") # 打印字符串开头
24
25base64_to_image(base64_str, "output.jpg")
26

1<?php
2// 在 PHP 中将图像文件转换为 base64
3function imageToBase64($path) {
4    $type = pathinfo($path, PATHINFO_EXTENSION);
5    $data = file_get_contents($path);
6    return 'data:image/' . $type . ';base64,' . base64_encode($data);
7}
8
9// 将 base64 转换为图像并保存
10function base64ToImage($base64String, $outputPath) {
11    // 提取 base64 编码的二进制数据
12    $imageData = explode(',', $base64String);
13    $imageData = isset($imageData[1]) ? $imageData[1] : $imageData[0];
14    
15    // 解码并保存
16    $data = base64_decode($imageData);
17    file_put_contents($outputPath, $data);
18}
19
20// 示例用法
21$base64Image = imageToBase64('input.jpg');
22echo substr($base64Image, 0, 50) . "...\n"; // 打印字符串开头
23
24base64ToImage($base64Image, 'output.jpg');
25?>
26

1import java.io.File;
2import java.io.FileOutputStream;
3import java.io.IOException;
4import java.nio.file.Files;
5import java.util.Base64;
6
7public class Base64ImageUtil {
8    
9    // 将图像文件转换为 base64
10    public static String imageToBase64(String imagePath) throws IOException {
11        File file = new File(imagePath);
12        byte[] fileContent = Files.readAllBytes(file.toPath());
13        String extension = imagePath.substring(imagePath.lastIndexOf(".") + 1);
14        String base64String = Base64.getEncoder().encodeToString(fileContent);
15        
16        return "data:image/" + extension + ";base64," + base64String;
17    }
18    
19    // 将 base64 转换为图像并保存
20    public static void base64ToImage(String base64String, String outputPath) throws IOException {
21        // 如果存在数据 URL 前缀，则移除
22        if (base64String.contains(",")) {
23            base64String = base64String.split(",")[1];
24        }
25        
26        byte[] decodedBytes = Base64.getDecoder().decode(base64String);
27        
28        try (FileOutputStream fos = new FileOutputStream(outputPath)) {
29            fos.write(decodedBytes);
30        }
31    }
32    
33    public static void main(String[] args) throws IOException {
34        String base64Image = imageToBase64("input.jpg");
35        System.out.println(base64Image.substring(0, 50) + "..."); // 打印字符串开头
36        
37        base64ToImage(base64Image, "output.jpg");
38    }
39}
40

1using System;
2using System.IO;
3using System.Text.RegularExpressions;
4
5class Base64ImageConverter
6{
7    // 将图像文件转换为 base64
8    public static string ImageToBase64(string imagePath)
9    {
10        byte[] imageBytes = File.ReadAllBytes(imagePath);
11        string base64String = Convert.ToBase64String(imageBytes);
12        
13        string extension = Path.GetExtension(imagePath).TrimStart('.').ToLower();
14        return $"data:image/{extension};base64,{base64String}";
15    }
16    
17    // 将 base64 转换为图像并保存
18    public static void Base64ToImage(string base64String, string outputPath)
19    {
20        // 如果存在数据 URL 前缀，则移除
21        if (base64String.Contains(","))
22        {
23            base64String = base64String.Split(',')[1];
24        }
25        
26        byte[] imageBytes = Convert.FromBase64String(base64String);
27        File.WriteAllBytes(outputPath, imageBytes);
28    }
29    
30    static void Main()
31    {
32        string base64Image = ImageToBase64("input.jpg");
33        Console.WriteLine(base64Image.Substring(0, 50) + "..."); // 打印字符串开头
34        
35        Base64ToImage(base64Image, "output.jpg");
36    }
37}
38

1require 'base64'
2
3# 将图像文件转换为 base64
4def image_to_base64(image_path)
5  extension = File.extname(image_path).delete('.')
6  base64_data = Base64.strict_encode64(File.read(image_path))
7  "data:image/#{extension};base64,#{base64_data}"
8end
9
10# 将 base64 转换为图像并保存
11def base64_to_image(base64_string, output_path)
12  # 如果存在数据 URL 前缀，则移除
13  if base64_string.include?(',')
14    base64_string = base64_string.split(',')[1]
15  end
16  
17  File.open(output_path, 'wb') do |file|
18    file.write(Base64.decode64(base64_string))
19  end
20end
21
22# 示例用法
23base64_image = image_to_base64('input.jpg')
24puts base64_image[0, 50] + '...' # 打印字符串开头
25
26base64_to_image(base64_image, 'output.jpg')
27

1' Excel VBA 函数将文件编码为 base64
2Function FileToBase64(filePath As String) As String
3    Dim fileNum As Integer
4    Dim fileData() As Byte
5    Dim objXML As Object
6    Dim objNode As Object
7    
8    fileNum = FreeFile
9    Open filePath For Binary Access Read As fileNum
10    ReDim fileData(LOF(fileNum) - 1)
11    Get fileNum, , fileData
12    Close fileNum
13    
14    Set objXML = CreateObject("MSXML2.DOMDocument")
15    Set objNode = objXML.createElement("b64")
16    
17    objNode.DataType = "bin.base64"
18    objNode.nodeTypedValue = fileData
19    
20    FileToBase64 = objNode.Text
21    
22    Set objNode = Nothing
23    Set objXML = Nothing
24End Function
25
26' 在 Excel 中使用：
27' =FileToBase64("C:\path\to\image.jpg")
28