feat[golang]: 添加一些go的常用工具类

net/src/test/go/util/stringutil/string.go

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2020 The zfoo Authors
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and limitations under the License.
+ */
+package stringutil
+
+import (
+	"bytes"
+	"net/url"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+// Reverse 反转字符串
+func Reverse(s string) string {
+	r := []rune(s)
+	for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
+		r[i], r[j] = r[j], r[i]
+	}
+	return string(r)
+}
+
+// UcFirst 首字母大写
+func UcFirst(s string) string {
+	for i, v := range s {
+		return string(unicode.ToUpper(v)) + s[i+1:]
+	}
+	return s
+}
+
+// LcFirst 首字母小写
+func LcFirst(s string) string {
+	for i, v := range s {
+		return string(unicode.ToLower(v)) + s[i+1:]
+	}
+	return s
+}
+
+// CamelToSnake camel => snake 简单实现
+func CamelToSnake(s string) string {
+	buffer := new(bytes.Buffer)
+	for i, r := range s {
+		if unicode.IsUpper(r) {
+			if i != 0 {
+				buffer.WriteRune('_')
+			}
+			buffer.WriteRune(unicode.ToLower(r))
+		} else {
+			buffer.WriteRune(r)
+		}
+	}
+	return buffer.String()
+}
+
+// SnakeToCamel snake => camel 简单实现
+func SnakeToCamel(s string) string {
+	s = strings.Replace(s, "_", " ", -1)
+	s = strings.Title(s)
+	return strings.Replace(s, " ", "", -1)
+}
+
+func SnakeToSpinal(s string) string {
+	return strings.Replace(s, "_", "-", -1)
+}
+
+func SpinalToSnake(s string) string {
+	return strings.Replace(s, "-", "_", -1)
+}
+
+// UrlEncode 空格被编码为+，+被编码为%2B
+func UrlEncode(s string) string {
+	return url.QueryEscape(s)
+}
+
+// UrlDecode URL解码
+func UrlDecode(s string) string {
+	u, _ := url.QueryUnescape(s)
+	return u
+}
+
+// Substr 字符串切割
+func Substr(s string, pos, length int) string {
+	r := []rune(s)
+	sl := len(r)
+	if pos >= sl {
+		return ""
+	}
+	idx := pos + length
+	if length == 0 || idx > sl {
+		idx = sl
+	} else if length < 0 {
+		idx = sl + length
+	}
+
+	return string(r[pos:idx])
+}
+
+// InString 判断子字符串是否存在
+func InString(sub, str string) bool {
+	if str != "" && strings.Contains(str, sub) {
+		return true
+	}
+	return false
+}
+
+// RegexpReplace ...
+func RegexpReplace(src, expr, repl string) (string, error) {
+	reg, err := regexp.Compile(expr)
+	return reg.ReplaceAllString(src, repl), err
+}
+
+// TrimSpace 去除字符串前后空格、换行等
+func TrimSpace(s string) string {
+	s = strings.TrimSpace(s)
+	s = strings.Trim(s, "\r")
+	s = strings.Trim(s, "\n")
+	s = strings.Trim(s, "\t")
+	return s
+}