kv := strings.Split(authString, " ")

	if len(kv) != 2 || kv[0] != "Bearer" {

		beego.Debug("AuthString invalid:"+authString)

		base.ReturnError(errors.New("AuthString invalid:"+authString))

		return ""

	}

	tokenString := kv[1]

kov := strings.Split(cond, ":")

		if len(kov) != 3 {

			return queryVal, queryOp, errors.New("Query format != k:o:v")

		}

prefixemail := strings.Split(email, "@")[0]

 s = strings.Split("abc,abc", "")

    fmt.Println(s, len(s))

    s = strings.Split("", ",")

    fmt.Println(s, len(s))

    s = strings.Split("abc,abc", ",")

    fmt.Println(s, len(s))

    s = strings.Split("abc,abc", "|")

    fmt.Println(s, len(s))

    fmt.Println(len(""))

    fmt.Println(len([]string{""}))

    str := ""

    fmt.Println(str[0])

运行结果:

[] 0    //返回空数组

[a b c , a b c] 7  //返回7个数组元素

[] 1  //返回一个包含空字符元素的数组, 数组长度是1

[abc abc] 2

[abc,abc] 1

0

1

panic: runtime error: index out of range