byte型转换十六进制字符串
/**
* byte型转换十六进制
* @param b
* @returns {string}
* @constructor
*/
const Bytes2HexString = (b)=> {
let hexs = ;
for (let i = 0; i < b.length; i++) {
let hex = (b[i]).toString(16);
if (hex.length === 1) {
hexs = '0' + hex;
}
hexs += hex.toUpperCase();
