修改一下string.replaceAll("[^a-zA-Z\\u4e00-\\u9fa5,,]|[,,]$","").replaceAll("[,,]{2,}",",").replaceAll("[,,]$","")
string.replaceAll("[^a-zA-Z\\u4e00-\\u9fa5,,]|[,,]$","").replaceAll("[,,]{2,}",",").replaceAll("[,,]$","")
string.replaceAll("[^a-zA-Z\\u4e00-\\u9fa5,,]","").replaceAll("[,,]$","")
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