diff --git a/string.go b/string.go
index 1b5220e..47c5a83 100644
--- a/string.go
+++ b/string.go
@@ -12,10 +12,35 @@ import (
 	"errors"
 	"git.zhangdeman.cn/zhangdeman/serialize"
 	"git.zhangdeman.cn/zhangdeman/util"
+	"github.com/axgle/mahonia"
 	"io"
+	"math/rand"
 	"strings"
+	"time"
 )
 
+// StringFromRandom 从随机字符串生成String
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:50 2023/8/11
+func StringFromRandom(length int, sourceCharList string) String {
+	if length == 0 {
+		return ""
+	}
+	if len(sourceCharList) == 0 {
+		//字符串为空，默认字符源为如下(去除易混淆的i/l):
+		sourceCharList = "0123456789abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ"
+	}
+	strByte := []byte(sourceCharList)
+	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(string(genStrByte))
+}
+
 // String 字符串类型包装
 //
 // Author : go_developer@163.com<白茶清欢>
@@ -987,3 +1012,111 @@ func (str String) Md5() StringResult {
 func (str String) Value() string {
 	return string(str)
 }
+
+// GetLetterList 获取字母列表
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:53 2023/8/11
+func (str String) GetLetterList() []string {
+	return []string{
+		"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n",
+		"o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
+	}
+}
+
+// SnakeCaseToCamel 蛇形字符串转换为驼峰
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 4:58 下午 2021/10/25
+func (str String) SnakeCaseToCamel() string {
+	if len(str) == 0 {
+		return ""
+	}
+	builder := strings.Builder{}
+	index := 0
+	if str[0] >= 'a' && str[0] <= 'z' {
+		builder.WriteByte(str[0] - ('a' - 'A'))
+		index = 1
+	}
+	for i := index; i < len(str); i++ {
+		if str[i] == '_' && i+1 < len(str) {
+			if str[i+1] >= 'a' && str[i+1] <= 'z' {
+				builder.WriteByte(str[i+1] - ('a' - 'A'))
+				i++
+				continue
+			}
+		}
+		// 将ID转为大写
+		if str[i] == 'd' && i-1 >= 0 && (str[i-1] == 'i' || str[i-1] == 'I') && (i+1 == len(str) || i+1 < len(str) && str[i+1] == '_') {
+			builder.WriteByte('d' - ('a' - 'A'))
+			continue
+		}
+		builder.WriteByte(str[i])
+	}
+	return builder.String()
+}
+
+// Convert 字符串编码转换
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:38 2022/7/9
+func (str String) Convert(sourceCode string, targetCode string) String {
+	sourceCoder := mahonia.NewDecoder(sourceCode)
+	sourceResult := sourceCoder.ConvertString(str.Value())
+	targetCoder := mahonia.NewDecoder(targetCode)
+	_, cdata, _ := targetCoder.Translate([]byte(sourceResult), true)
+	return String(string(cdata))
+}
+
+// ClearChar 清理指定字符
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:59 2023/8/11
+func (str String) ClearChar(charList ...string) String {
+	if len(charList) == 0 {
+		return str
+	}
+	formatStr := str.Value()
+	for _, item := range charList {
+		formatStr = strings.ReplaceAll(formatStr, item, "")
+	}
+	return String(formatStr)
+}
+
+// ReplaceChineseChar 替换常见的中文符号
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 16:59 2023/4/4
+func (str String) ReplaceChineseChar() String {
+	charTable := map[string]string{
+		"（": "(",
+		"）": ")",
+		"：": ":",
+		"，": ",",
+		"。": ".",
+		"【": "]",
+		"】": "]",
+	}
+	return str.ReplaceChar(charTable)
+}
+
+// ReplaceChar 替换指定字符
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 15:01 2023/8/11
+func (str String) ReplaceChar(charTable map[string]string) String {
+	if len(charTable) == 0 {
+		return str
+	}
+	formatStr := str.Value()
+	for k, v := range charTable {
+		formatStr = strings.ReplaceAll(formatStr, k, v)
+	}
+	return String(formatStr)
+}