手机号隐藏4位

1.mssql中 SELECT INSERT(mobile, 4, 4, '****')AS Mobile from Users ; 2.正则 s.replaceAll("(\d{3})\d{4}(\d{4})", "$1****$2"); 3.js var tel = 18810399133; tel = "" + tel; var tel1 = tel.substr(0,3) + "****" + tel.substr(7) console.log(tel1);