java中特殊字符（除数字和字母之外的所有内容）的正则表达式是什么

Question

I wish to convert all the special characters(everything except digits & alphabets) to the character '*' by using replaceAll()

string2=string1.replaceAll("[RegX]", "*")

What shall I write in place of RegX ?

Answer 1

The following should work : \\W . It matches anything other than a letter, digit or underscore.

We just need to add the _ to pick it up also.

string2 = string1.replaceAll("[\\W_]", "*")

Demo

Answer 2

正则表达式"[^\\\\p{IsLatin}\\\\p{Digit}]"还将识别特定于语言的字符，例如œŒŸÉÑÜÚÓöÄß 。