使用 replaceAll 你将不得不使用 .replaceAll("\\\\r", "\r"); 因为

With replaceAll you would have to use .replaceAll("\\\\r", "\r"); because

• 要在正则表达式中表示 \ 您需要对其进行转义，因此您需要使用 pass \\ 到正则表达式引擎
• 但是要为单个 \ 创建字符串文字，您需要将其写为 "\\".

• to represent \ in regex you need to escape it so you need to use pass \\ to regex engine
• but and to create string literal for single \ you need to write it as "\\".

更清晰的方法是使用 replace("\\r", "\r"); 它将自动转义所有正则表达式元字符.

Clearer way would be using replace("\\r", "\r"); which will automatically escape all regex metacharacters.