1、匹配域名/ip地址+图片的地址：/^((((http|https)(\:\/\/)|[A-Z-a-z-0-9])(([A-Z-a-z-0-9]+?[\.](com|cn|org|net|name))|([0-9]+?[\.])+[0-9]|([A-Z-a-z-0-9]+?[\.])+[A-Z-a-z-0-9])+?[\/])|[A-Z-a-z-0-9])([A-Za-z0-9\/]+\.(png|gif|jpeg|jpg))+?/
