diff --git a/util/string.go b/util/string.go
new file mode 100644
index 0000000..ae4cde5
--- /dev/null
+++ b/util/string.go
@@ -0,0 +1,48 @@
+// Package util...
+//
+// Description : 字符串相关的工具
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-03-09 6:00 下午
+package util
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"math/rand"
+	"time"
+)
+
+// GenRandomString 获取随机长度的字符串
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 6:01 下午 2021/3/9
+func GenRandomString(source string, length uint) string {
+	if length == 0 {
+		return ""
+	}
+	if len(source) == 0 {
+		//字符串为空，默认字符源为如下:
+		source = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	}
+	strByte := []byte(source)
+	var genStrByte = make([]byte, 0)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < int(length); i++ {
+		genStrByte = append(genStrByte, strByte[r.Intn(len(strByte))])
+	}
+	return string(genStrByte)
+}
+
+// Md5 对字符串进行md5加密
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 6:01 下午 2021/3/9
+func Md5(str string) string {
+	h := md5.New()
+	h.Write([]byte(str))
+	return hex.EncodeToString(h.Sum(nil))
+}