重要的事情说三遍，拒绝加班！拒绝加班！拒绝加班！
分享一些日常积累的实用golang工具小方法，从此拒绝加班～
结构体转json字符串
func DumpString(v interface{}) (str string) {bs, err := json.Marshal(v)b := bytes.Buffer{}if err != nil {b.WriteString("{err:\"json format error.")b.WriteString(err.Error())b.WriteString("\"}")} else {b.Write(bs)}str = b.String()return str
}获取指定长度指定前缀的uuid
import ("crypto/rand""fmt""math/big"mathrandom "math/rand""time"
)func GenerateUUID(prefex string, uuidLen int) string {var character = []byte("abcdefgijklmnopqrstuvwxyz0123456789")var chLen = len(character)buf := make([]byte, uuidLen, uuidLen)max := big.NewInt(int64(chLen))for i := 0; i < uuidLen; i++ {random, err := rand.Int(rand.Reader, max)if err != nil {mathrandom.Seed(time.Now().UnixNano())buf[i] = character[mathrandom.Intn(chLen)]continue}buf[i] = character[random.Int64()]}return fmt.Sprintf("%s-%s", prefex, string(buf))
}深克隆结构体
func Clone(i interface{}) interface{} {typ := reflect.TypeOf(i)for typ.Kind() == reflect.Ptr {typ = typ.Elem()}vl := reflect.ValueOf(i)if vl.IsNil() {return reflect.New(typ)}for vl.Kind() == reflect.Ptr {vl = vl.Elem()}el := reflect.New(typ).Elem()el.Set(vl)return el.Addr().Interface()
}浅拷贝结构体
func Copy(dst interface{}, src interface{}) error {if dst == nil {return fmt.Errorf("dst cannot be nil")}if src == nil {return fmt.Errorf("src cannot be nil")}bytes, err := json.Marshal(src)if err != nil {return fmt.Errorf("Unable to marshal src: %s", err)}err = json.Unmarshal(bytes, dst)if err != nil {return fmt.Errorf("Unable to unmarshal into dst: %s", err)}return nil
}url是否合法
func IsValidHttpUrl(urlPath string) bool {u := urlPathvar httpPre = regexp.MustCompile(`^https?://`)// 协议校验if !httpPre.Match([]byte(u)) {return false}// url format校验r, err := url.Parse(urlPath)if err != nil {return false}//必须为可解析的ip或域名if net.ParseIP(r.Hostname()) == nil {ips, err := net.LookupIP(r.Hostname())if err != nil || len(ips) == 0 {return false}}return true
}是否为ipv6
func IsIPV6(target string) bool {ip := net.ParseIP(target)if ip != nil {if ip.To4() == nil && ip.To16() != nil {return true}}return false
}是否为ipv4
func ValidIP4(ipAddress string) bool {ipAddress = strings.Trim(ipAddress, " ")re, _ := regexp.Compile(`^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$`)if re.MatchString(ipAddress) {return true}return false
}base64编码
func Base64Encode(s string) string {return base64.StdEncoding.EncodeToString([]byte(s))
}base64解码
func Base64Decode(s string) (string, error) {r, err := base64.StdEncoding.DecodeString(s)if err != nil {return "", err}return string(r), nil
}md5加密
func MD5Strings(strings ...string) string {h := md5.New()for _, s := range strings {io.WriteString(h, s)}return fmt.Sprintf("%x", h.Sum(nil))
}数组转换为map
func ConvertSliceToMap(s []string) map[string]struct{} {ret := map[string]struct{}{}for _, v := range s {ret[v] = struct{}{}}return ret
}为了减少加班，持续分享中...