Java工具类实现校验邮箱地址的有效性

Pattern pattern = Pattern.compile("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$");

Matcher matcher = pattern.matcher("a@aa.com");

System.out.println(matcher.matches());