var arry = [21, 23, 0, 0, 0, 0, 21, 255, 43, 154, 87, 32, 4, 13, 64, 7, 86, 52, 1, 23, 16, 57, 73, 1];
            var str = base64Encode(arry);//转换字符串
            console.log(str);
            var arry2= base64Decode(str).split(',');
            console.log(arry2);//转回数组

            function base64Encode(input) {
                var rv;
                rv = encodeURIComponent(input);
                rv = unescape(rv);
                rv = window.btoa(rv);
                return rv;
            }
            function base64Decode(input) {
                rv = window.atob(input);
                rv = escape(rv);
                rv = decodeURIComponent(rv);
                return rv;
            }

先 json stringify 最后再 parse