feat 初始化

utils/string.go

@@ -0,0 +1,49 @@
+package utils
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"math/rand"
+)
+
+// GetMD5Encode 获取Md5编码
+func GetMD5Encode(data string) string {
+	h := md5.New()
+	h.Write([]byte(data))
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+const (
+	StringChars1 = "0123456789"
+	StringChars2 = "abcdefghijklmnopqrstuvwxyz"
+	StringChars3 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	StringChars4 = "0123456789abcdefghijklmnopqrstuvwxyz"
+	StringChars5 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	StringChars6 = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	StringChars7 = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+)
+
+// RandomString 获取随机字符串
+func RandomString(chars string, length int8) string {
+	result := make([]byte, length)
+	for i := int8(0); i < length; i++ {
+		result[i] = chars[rand.Intn(len(chars))]
+		if i == 0 && result[i] == '0' {
+			i--
+		}
+	}
+	return string(result)
+}
+
+// GetDisplayWidth 获取字符串长度
+func GetDisplayWidth(text string) int {
+	width := 0
+	for _, r := range text {
+		if r <= 0x7F {
+			width += 1 // ASCII，半角
+		} else {
+			width += 2 // CJK、日文假名等，全角
+		}
+	}
+	return width
+}