正则规则是:
[A-Za-z0-9.\-+_]+@[a-z0-9.\-+_]+\.[a-z]+
以python为例:
import re
string = "hahah 1332@232.com.cn sdds ss喔喔喔s211@133.com www.baidu.com"
email_list = re.findall(r"[A-Za-z0-9.\-+_]+@[a-z0-9.\-+_]+\.[a-z]+", string) # 邮箱
print(email_list)