📅  最后修改于: 2022-03-11 14:52:18.961000             🧑  作者: Mango
//Ther are three type of REGULAR EXPRESSION
//first
^(.+)@(.+)$ "^(.+)@(.+)$\""
//second
^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}$
//third
^[\\w!#$%&'*+/=?`{|}~^-]+(?:\\.[\\w!#$%&'*+/=?`{|}~^-]+)*@(?!-)(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,6}$