您要 [\ D] 或 [^ \ d] ，但不需要 [^ \ D] .正则表达式区分大小写， \ d 匹配数字，而 \ D 匹配除数字之外的任何内容.

You want [\D] or [^\d], but not [^\D]. Regex is case-sensitive, \d matches a digit, and \D matches anything but a digit.