UCS2和UTF16有区别

UCS2是定长的,固定2个字节,所以不能支持扩展字符,而UTF16是变长的。
 
UCS2是落伍的。
 
msdn里有这样一段描述:
UCS-2 is a predecessor of UTF-16. UCS-2 differs from UTF-16 in that UCS-2 is a fixed-length encoding that represents all characters as a 16-bit value (2 bytes), and therefore does not support supplementary characters. UCS-2 is frequently confused with UTF-16, which is used to internally represent text in the Microsoft Windows operating systems (Windows NT, Windows 2000, Windows XP, and Windows CE), but UCS-2 is more limited.

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