Base64可以将任何二进制文件以可打印字符的方式表示,也就是说,任何二进制文件都可以通过Base64编码技术转成字符串。在Java中,可以使用Base64类实现。

1、图片(二进制文件)转字符串

import base64

f = open('E://cc.jpg','rb')
imagebytes = base64.b64encode(f.read())
f.close()

imagestr = str(imagebytes)

##转成base64后的字符串格式为 b'图片base64字符串',前面多了 b',末尾多了 ',所以需要截取一下
realimagestr = imagestr[2:len(imagestr)-1]

print(realimagestr)

 

2、字符串转图片(二进制文件)

import base64

## 图片的base64字符串
imagestr = "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"

## 新图片保存路径
imagepath = "E://aabb.jpg"

file = open(imagepath, 'wb')

file.write(base64.b64decode(imagestr))