UTF-8是可以表示任何Unicode字符的多字节编码。 ISO 8859-1是一个单字节编码，可以表示前256个Unicode字符。两者以完全相同的方式编码ASCII。

UTF-8 is a multibyte encoding that can represent any Unicode character. ISO 8859-1 is a single-byte encoding that can represent the first 256 Unicode characters. Both encode ASCII exactly the same way.