string2

type IStringHelper interface {
	Decode([]byte) []byte
	Encode(raw []byte) []byte
	ToIntArray(s []string) []int64
	RandToken(offset int64) string
	MD5Sum(str string) string
	EqChineseChar(str string) (eq bool)
	EqEmpty(filter ...string) bool
	GetRandomString(l int) string
	CreateFileHash(reader io.Reader) (str string)
}