将Base64编码的图像写入文件 [英] Write Base64-encoded image to file

问题描述

如何将Base64编码的图像写入文件？

How to write a Base64-encoded image to file?

我已使用Base64将图像编码为字符串。
首先，我读取文件，然后将其转换为字节数组，然后应用Base64编码将图像转换为字符串。

I have encoded an image to a string using Base64. First, I read the file, then convert it to a byte array and then apply Base64 encoding to convert the image to a string.

现在我的问题是如何解码它。

Now my problem is how to decode it.

byte dearr[] = Base64.decodeBase64(crntImage);
File outF = new File("c:/decode/abc.bmp");
BufferedImage img02 = ImageIO.write(img02, "bmp", outF); 

变量 crntImage 包含字符串表示形式图像。

The variable crntImage contains the string representation of the image.

推荐答案

假设图像数据已经是你想要的格式，你不需要图像 ImageIO - 你只需要将数据写入文件：

Assuming the image data is already in the format you want, you don't need image ImageIO at all - you just need to write the data to the file:

// Note preferred way of declaring an array variable
byte[] data = Base64.decodeBase64(crntImage);
try (OutputStream stream = new FileOutputStream("c:/decode/abc.bmp")) {
    stream.write(data);
}

（我假设你在这里使用Java 7 - 如果没有，你需要编写一个手动的try / finally语句来关闭流。）

(I'm assuming you're using Java 7 here - if not, you'll need to write a manual try/finally statement to close the stream.)

如果图像数据不是的格式你想要的，你需要提供更多细节。

If the image data isn't in the format you want, you'll need to give more details.

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