使用FileReader在readAsBinaryString和readAsText之间的区别 [英] Difference between readAsBinaryString and readAsText using FileReader

问题描述

举个例子，当我使用FileReader API从文件中读取π字符（ \ u03C0 ）时，我将pi字符带回给我使用预期的 FileReader.readAsText（blob）读取它。但是当我使用 FileReader.readAsBinaryString（blob）时，我得到结果 \ xcf \ x80 ，而不是似乎与pi字符没有任何明显的相关性。这是怎么回事？ （这可能与编码UTF-8/16的方式有关...）

So as an example, when I read the π character (\u03C0) from a File using the FileReader API, I get the pi character back to me when I read it using FileReader.readAsText(blob) which is expected. But when I use FileReader.readAsBinaryString(blob), I get the result \xcf\x80 instead, which doesn't seem to have any visible correlation with the pi character. What's going on? (This probably has something to do with the way UTF-8/16 is encoded...)

推荐答案

哦，好吧，如果这就是你所需要的...... :)

Oh well, if that's all you needed... :)

CF80 是π的UTF-8编码。

CF80 is the UTF-8 encoding for π.

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