feat: query_parser + stringcase.

stringcase/camel_case.go

@@ -0,0 +1,65 @@
+package stringcase
+
+import (
+	"strings"
+	"unicode"
+)
+
+func UpperCamelCase(input string) string {
+	return camelCase(input, true)
+}
+
+func LowerCamelCase(input string) string {
+	return camelCase(input, false)
+}
+
+// ToPascalCase 把字符转换为 帕斯卡命名/大驼峰命名法（CamelCase）
+func ToPascalCase(input string) string {
+	return camelCase(input, true)
+}
+
+func camelCase(input string, upper bool) string {
+	input = strings.TrimSpace(input)
+	if input == "" {
+		return input
+	}
+
+	// 分割字符串
+	words := Split(input)
+	if len(words) == 0 {
+		return ""
+	}
+
+	filteredWords := make([]string, 0, len(words))
+	for _, word := range words {
+		if strings.TrimSpace(word) != "" {
+			filteredWords = append(filteredWords, word)
+		}
+	}
+	words = filteredWords
+	if len(words) == 0 {
+		return ""
+	}
+
+	for i, word := range words {
+		if word == "" {
+			continue
+		}
+
+		runes := []rune(word)
+		if len(runes) > 0 {
+			if i == 0 && !upper {
+				runes[0] = unicode.ToLower(runes[0]) // LowerCamelCase首单词首字母小写
+			} else {
+				runes[0] = unicode.ToUpper(runes[0]) // UpperCamelCase或后续单词首字母大写
+			}
+			for j := 1; j < len(runes); j++ {
+				runes[j] = unicode.ToLower(runes[j]) // 其余字母统一小写
+			}
+			words[i] = string(runes)
+		}
+	}
+
+	// 合并结果
+	return strings.Join(words, "")
+}