POJO属性转为数据库属性 (加下划线)

function convert2DbProp(prop){
    var retVal = prop;
    var prefix = prop.substr(0,prop.search("[A-Z]"))
    if(''===prefix) {
        return retVal.toUpperCase();
    } else {
        var suffix = prop.replace(prefix,"");
        var tempVal = prefix + "_" + suffix.charAt(0).toLowerCase().concat(suffix.substring(1));
        return convert2DbProp(tempVal);
    }
}