字符串 转 int
string to int
intNum, _ = strconv.Atoi(intStr)
----------------------------------

字符串 转 int64
string to int64
intNum, _ := strconv.Atoi(intStr)
int64Num = int64(intNum)
----------------------------------

字符串 转 uint64
string to unint64
intNum, _ := strconv.Atoi(intStr)
int64Num = uint64(intNum)