diff --git a/str.go b/str.go
index 72c8661..6e097b2 100644
--- a/str.go
+++ b/str.go
@@ -3,6 +3,8 @@
 package str
 
 import (
+	"encoding/json"
+	"fmt"
 	"math/rand"
 	"strings"
 	"time"
@@ -89,14 +91,24 @@ func MapsKeysString(imap interface{}) string {
 	return strings.Join(keys, ",")
 }
 
-//// CHARSTRING   string = "" //will initialize by init function
-//// func init() {
-//// 	NUMBERSTRING = "0123456789"
-//// 	CHARSTRING = NUMBERSTRING
-//// 	for i := 'a'; i <= 'z'; i++ {
-//// 		CHARSTRING = CHARSTRING + string(i)
-//// 	}
-//// 	for i := 'A'; i <= 'Z'; i++ {
-//// 		CHARSTRING = CHARSTRING + string(i)
-//// 	}
-//// }
+// string json to string map to string
+func JsonstrToStrMap(jsonstr string) (m map[string]string) {
+	err := json.Unmarshal([]byte(jsonstr), &m)
+	if err != nil {
+		panic(fmt.Sprintf("Jsonstr[%s] To MapString failed:%s", jsonstr, err.Error()))
+	}
+	return m
+}
+
+// string to string map to string
+//   example: "K1:V1;K2:V2"
+//         => {K1:V1, K2:V2}
+func StringToStrMap(str string, sep1, sep2 string) (m map[string]string) {
+	m = map[string]string{}
+	for _, kvstr := range strings.Split(str, sep1) {
+		if kv := strings.SplitN(kvstr, sep2, 2); len(kv) == 2 {
+			m[kv[0]] = kv[1]
+		}
+	}
+	return m
+}