如果您的工具使用的引擎是C#正则表达式引擎，那么您可以尝试以下表达式:

If the engine used by your tool is the C# regular expression engine, then you can try the following expression:

(?<!,\s*"(?:[^\\"]|\\")*)\s+(?!(?:[^\\"]|\\")*"\s*,)

替换为空字符串.

伙计们的答案假设报价是平衡的，并使用计数来确定空格是否是报价值的一部分.

The guys answers assumed the quotes are balanced and used counting to determine if the space is part of a quoted value or not.

我的表达式查找不属于引号值的所有空格.

My expression looks for all spaces that are not part of a quoted value.

RegexHero演示