^(\d{1,3}((((,|，)\d{3})*)|\d+))(\.\d+)?$
分隔符适配半角、全角逗号
匹配 32,324.0000 123,456.1234 123,456 123456 123456.000
不匹配 1234,00.00 1244,123.00 1234,1234.00
REGEX链接