diff --git a/pkg/conver/conver.go b/pkg/conver/conver.go
index 7fcd53a..b277b11 100644
--- a/pkg/conver/conver.go
+++ b/pkg/conver/conver.go
@@ -1,7 +1,69 @@
 package conver
 
-import "strconv"
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
 
 func FloatToString(val float64) string {
 	return strconv.FormatFloat(val, 'f', 1, 64)
 }
+
+func SliceIntToString(num []int64) string {
+	result := ""
+
+	if len(num) > 0 {
+		for _, item := range num {
+			result = fmt.Sprintf("%s,%d", result, item)
+		}
+		if !strings.HasSuffix(result, ",") {
+			result = fmt.Sprintf("%s,", result)
+		}
+	}
+
+	return result
+}
+
+func SliceStringToString(num []string) string {
+	result := ""
+
+	if len(num) > 0 {
+		for _, item := range num {
+			result = fmt.Sprintf("%s,%s", result, item)
+		}
+		if !strings.HasSuffix(result, ",") {
+			result = fmt.Sprintf("%s,", result)
+		}
+	}
+
+	return result
+}
+
+func StringToSlice(num string) []string {
+	var result []string
+
+	if len(num) > 0 {
+		result = strings.Split(num, ",")
+	}
+
+	return result
+}
+
+func StringToSliceInt(num string) []int64 {
+	var result []int64
+
+	if len(num) > 0 {
+		array := strings.Split(num, ",")
+		if len(array) > 0 {
+			for _, item := range array {
+				i, err := strconv.Atoi(item)
+				if err == nil {
+					result = append(result, int64(i))
+				}
+			}
+		}
+	}
+
+	return result
+}
diff --git a/pkg/snowflake/snowflake.go b/pkg/snowflake/snowflake.go
new file mode 100644
index 0000000..05a8b59
--- /dev/null
+++ b/pkg/snowflake/snowflake.go
@@ -0,0 +1,55 @@
+package snowflake
+
+import (
+	"errors"
+	"sync"
+	"time"
+)
+
+const (
+	workerBits  uint8 = 10
+	numberBits  uint8 = 12
+	workerMax   int64 = -1 ^ (-1 << workerBits)
+	numberMax   int64 = -1 ^ (-1 << numberBits)
+	timeShift   uint8 = workerBits + numberBits
+	workerShift uint8 = numberBits
+	startTime   int64 = 1262275200000 // 如果在程序跑了一段时间修改了epoch这个值 可能会导致生成相同的ID (开始时间-毫秒)
+)
+
+type Worker struct {
+	mu        sync.Mutex
+	timestamp int64
+	workerId  int64
+	number    int64
+}
+
+func NewWorker(workerId int64) (*Worker, error) {
+	if workerId < 0 || workerId > workerMax {
+		return nil, errors.New("worker id excess of quantity")
+	}
+	// 生成一个新节点
+	return &Worker{
+		timestamp: 0,
+		workerId:  workerId,
+		number:    0,
+	}, nil
+}
+
+func (w *Worker) GetId() int64 {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	now := time.Now().UnixNano() / 1e6
+	if w.timestamp == now {
+		w.number++
+		if w.number > numberMax {
+			for now <= w.timestamp {
+				now = time.Now().UnixNano() / 1e6
+			}
+		}
+	} else {
+		w.number = 0
+		w.timestamp = now
+	}
+	ID := int64((now-startTime)<<timeShift | (w.workerId << workerShift) | (w.number))
+	return ID
+}
diff --git a/pkg/st/strings.go b/pkg/st/strings.go
index 6736178..7d3f946 100644
--- a/pkg/st/strings.go
+++ b/pkg/st/strings.go
@@ -1,7 +1,9 @@
 package st
 
 import (
+	"encoding/json"
 	"regexp"
+	"strconv"
 	"strings"
 )
 
@@ -52,3 +54,61 @@ func RemoveHTML(str string) string {
 	}
 	return ""
 }
+
+// Strval 获取变量的字符串值
+// 浮点型 3.0将会转换成字符串3, "3"
+// 非数值或字符类型的变量将会被转换成JSON格式字符串
+func Strval(value interface{}) string {
+	// interface 转 string
+	var key string
+	if value == nil {
+		return key
+	}
+
+	switch value.(type) {
+	case float64:
+		ft := value.(float64)
+		key = strconv.FormatFloat(ft, 'f', -1, 64)
+	case float32:
+		ft := value.(float32)
+		key = strconv.FormatFloat(float64(ft), 'f', -1, 64)
+	case int:
+		it := value.(int)
+		key = strconv.Itoa(it)
+	case uint:
+		it := value.(uint)
+		key = strconv.Itoa(int(it))
+	case int8:
+		it := value.(int8)
+		key = strconv.Itoa(int(it))
+	case uint8:
+		it := value.(uint8)
+		key = strconv.Itoa(int(it))
+	case int16:
+		it := value.(int16)
+		key = strconv.Itoa(int(it))
+	case uint16:
+		it := value.(uint16)
+		key = strconv.Itoa(int(it))
+	case int32:
+		it := value.(int32)
+		key = strconv.Itoa(int(it))
+	case uint32:
+		it := value.(uint32)
+		key = strconv.Itoa(int(it))
+	case int64:
+		it := value.(int64)
+		key = strconv.FormatInt(it, 10)
+	case uint64:
+		it := value.(uint64)
+		key = strconv.FormatUint(it, 10)
+	case string:
+		key = value.(string)
+	case []byte:
+		key = string(value.([]byte))
+	default:
+		newValue, _ := json.Marshal(value)
+		key = string(newValue)
+	}
+	return key
+}