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字符串除了第一位和最後一位中間用*替換

username subst sub name user bst rim his while

$(".user-name").each(function(){
var userName = $(this).html().trim();
var _name = "";
var nameLength = userName.length;
if (nameLength > 2) {
var nameLength = nameLength - 2;
while (nameLength > 0) {
_name += "*";
nameLength--;
}
userName = userName.substr(0, 1) + _name + userName.substr(userName.length - 1, userName.length);
$(this).html(userName);
}
})

字符串除了第一位和最後一位中間用*替換