string》 int
int,err:=strconv.Atoi(string)
string》 int64
int64, err := strconv.ParseInt(string, 10, 64)
int》 string
string:=strconv.Itoa(int)
int64》 string
string:=strconv.FormatInt(int64,10)
int,err:=strconv.Atoi(string)
int64, err := strconv.ParseInt(string, 10, 64)
string:=strconv.Itoa(int)
string:=strconv.FormatInt(int64,10)