Split by whitespace and newline 好用的一种，如果分割是空白
Use the strings.Fields function to split a string into substrings removing any space characters, including newlines.
s := strings.Fields(" a \t b \n")
fmt.Println(s)
// Output: [a b]
Split on comma or other substring
Use the strings.Split function to split a string into its comma separated values.
s := strings.Split("a,b,c", ",")
fmt.Println(s)
// Output: [a b c]
