code: function (bytes) {
                  var str = '';
                  for (var i = 0, l = bytes.length; i < l; i += 2) {
                      str += String.fromCharCode((bytes[i] << 8) + bytes[i + 1]);
                  }
                  return str;
              }
docs: ucs2字节转字符串
  
  @param {Array} bytes 字节
  @return {string} 字符串