diff --git a/utils/convert.go b/utils/convert.go
index 95b160a..763673b 100644
--- a/utils/convert.go
+++ b/utils/convert.go
@@ -2,21 +2,21 @@ package utils
 
 import (
 	"math"
-	"reflect"
 	"strconv"
 	"strings"
-	"unsafe"
 )
 
 // 字符串转Int
-//    intStr：数字的字符串
+//
+//	intStr：数字的字符串
 func String2Int(intStr string) (intNum int) {
 	intNum, _ = strconv.Atoi(intStr)
 	return
 }
 
 // 字符串转Int64
-//    intStr：数字的字符串
+//
+//	intStr：数字的字符串
 func String2Int64(intStr string) (int64Num int64) {
 	intNum, _ := strconv.Atoi(intStr)
 	int64Num = int64(intNum)
@@ -24,14 +24,16 @@ func String2Int64(intStr string) (int64Num int64) {
 }
 
 // 字符串转Float64
-//    floatStr：小数点数字的字符串
+//
+//	floatStr：小数点数字的字符串
 func String2Float64(floatStr string) (floatNum float64) {
 	floatNum, _ = strconv.ParseFloat(floatStr, 64)
 	return
 }
 
 // 字符串转Float32
-//    floatStr：小数点数字的字符串
+//
+//	floatStr：小数点数字的字符串
 func String2Float32(floatStr string) (floatNum float32) {
 	floatNum64, _ := strconv.ParseFloat(floatStr, 32)
 	floatNum = float32(floatNum64)
@@ -39,14 +41,16 @@ func String2Float32(floatStr string) (floatNum float32) {
 }
 
 // Int转字符串
-//    intNum：数字字符串
+//
+//	intNum：数字字符串
 func Int2String(intNum int) (intStr string) {
 	intStr = strconv.Itoa(intNum)
 	return
 }
 
 // Int64转字符串
-//    intNum：数字字符串
+//
+//	intNum：数字字符串
 func Int642String(intNum int64) (int64Str string) {
 	//10, 代表10进制
 	int64Str = strconv.FormatInt(intNum, 10)
@@ -54,8 +58,9 @@ func Int642String(intNum int64) (int64Str string) {
 }
 
 // Float64转字符串
-//    floatNum：float64数字
-//    prec：精度位数（不传则默认float数字精度）
+//
+//	floatNum：float64数字
+//	prec：精度位数（不传则默认float数字精度）
 func Float64ToString(floatNum float64, prec ...int) (floatStr string) {
 	if len(prec) > 0 {
 		floatStr = strconv.FormatFloat(floatNum, 'f', prec[0], 64)
@@ -66,8 +71,9 @@ func Float64ToString(floatNum float64, prec ...int) (floatStr string) {
 }
 
 // Float32转字符串
-//    floatNum：float32数字
-//    prec：精度位数（不传则默认float数字精度）
+//
+//	floatNum：float32数字
+//	prec：精度位数（不传则默认float数字精度）
 func Float32ToString(floatNum float32, prec ...int) (floatStr string) {
 	if len(prec) > 0 {
 		floatStr = strconv.FormatFloat(float64(floatNum), 'f', prec[0], 32)
@@ -90,15 +96,6 @@ func BinaryToDecimal(bit string) (num int) {
 	return
 }
 
-// BytesToString 0 拷贝转换 slice byte 为 string
-func BytesToString(b []byte) (s string) {
-	_bptr := (*reflect.SliceHeader)(unsafe.Pointer(&b))
-	_sptr := (*reflect.StringHeader)(unsafe.Pointer(&s))
-	_sptr.Data = _bptr.Data
-	_sptr.Len = _bptr.Len
-	return s
-}
-
 // interface to string
 func AnyToString(in any) (s string) {
 	if in == nil {
diff --git a/utils/random.go b/utils/random.go
index 6a28462..176bb2b 100644
--- a/utils/random.go
+++ b/utils/random.go
@@ -2,7 +2,6 @@ package utils
 
 import (
 	"math/rand/v2"
-	"time"
 )
 
 // 随机生成字符串
@@ -10,11 +9,10 @@ func RandomString(l int) string {
 	str := "0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
 	bytes := []byte(str)
 	var result []byte = make([]byte, 0, l)
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	for i := 0; i < l; i++ {
-		result = append(result, bytes[r.Intn(len(bytes))])
+		result = append(result, bytes[rand.IntN(len(bytes))])
 	}
-	return BytesToString(result)
+	return string(result)
 }
 
 // 随机生成纯字符串
@@ -22,11 +20,21 @@ func RandomPureString(l int) string {
 	str := "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
 	bytes := []byte(str)
 	var result []byte = make([]byte, 0, l)
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	for i := 0; i < l; i++ {
-		result = append(result, bytes[r.Intn(len(bytes))])
+		result = append(result, bytes[rand.IntN(len(bytes))])
 	}
-	return BytesToString(result)
+	return string(result)
+}
+
+// 随机生成纯大写字符串
+func RandomPureUpString(l int) string {
+	str := "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	bytes := []byte(str)
+	var result []byte = make([]byte, 0, l)
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[rand.IntN(len(bytes))])
+	}
+	return string(result)
 }
 
 // 随机生成数字字符串
@@ -34,9 +42,8 @@ func RandomNumber(l int) string {
 	str := "0123456789"
 	bytes := []byte(str)
 	var result []byte
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	for i := 0; i < l; i++ {
-		result = append(result, bytes[r.Intn(len(bytes))])
+		result = append(result, bytes[rand.IntN(len(bytes))])
 	}
-	return BytesToString(result)
+	return string(result)
 }