add string utils
This commit is contained in:
kenneth
296
pkg/strutil/string.go
Normal file
296
pkg/strutil/string.go
Normal file
@@ -0,0 +1,296 @@
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// Package strutil 实现了一些函数来操作字符串
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package strutil
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import (
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"regexp"
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"strings"
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"unicode"
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"unicode/utf8"
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)
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// CamelCase 转换字符串到驼峰法(CamelCase)
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func CamelCase(s string) string {
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if len(s) == 0 {
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return ""
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}
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res := ""
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blankSpace := " "
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regex, _ := regexp.Compile("[-_&]+")
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ss := regex.ReplaceAllString(s, blankSpace)
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for i, v := range strings.Split(ss, blankSpace) {
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vv := []rune(v)
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if i == 0 {
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if vv[i] >= 65 && vv[i] <= 96 {
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vv[0] += 32
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}
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res += string(vv)
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} else {
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res += Capitalize(v)
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}
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}
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return res
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}
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// Capitalize 将一个字符串的第一个字符转换为大写,其余的转换为小写
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func Capitalize(s string) string {
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if len(s) == 0 {
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return ""
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}
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out := make([]rune, len(s))
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for i, v := range s {
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if i == 0 {
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out[i] = unicode.ToUpper(v)
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} else {
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out[i] = unicode.ToLower(v)
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}
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}
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return string(out)
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}
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// UpperFirst 将字符串的第一个字符转换为大写
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func UpperFirst(s string) string {
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if len(s) == 0 {
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return ""
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}
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r, size := utf8.DecodeRuneInString(s)
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r = unicode.ToUpper(r)
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return string(r) + s[size:]
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}
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// LowerFirst 将字符串的第一个字符转换为小写
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func LowerFirst(s string) string {
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if len(s) == 0 {
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return ""
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}
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r, size := utf8.DecodeRuneInString(s)
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r = unicode.ToLower(r)
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return string(r) + s[size:]
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}
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// PadEnd 如果字符串比尺寸短,则将其垫在右侧
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// 填充字符如果超过大小,将被截断
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func PadEnd(source string, size int, padStr string) string {
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len1 := len(source)
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len2 := len(padStr)
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if len1 >= size {
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return source
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}
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fill := ""
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if len2 >= size-len1 {
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fill = padStr[0 : size-len1]
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} else {
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fill = strings.Repeat(padStr, size-len1)
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}
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return source + fill[0:size-len1]
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}
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// PadStart 如果字符串比尺寸短,则将其垫在左侧
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//填充字符如果超过大小,将被截断
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func PadStart(source string, size int, padStr string) string {
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len1 := len(source)
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len2 := len(padStr)
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if len1 >= size {
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return source
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}
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fill := ""
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if len2 >= size-len1 {
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fill = padStr[0 : size-len1]
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} else {
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fill = strings.Repeat(padStr, size-len1)
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}
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return fill[0:size-len1] + source
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}
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// KebabCase 将字符串转为短横线隔开式(kebab-case)
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func KebabCase(s string) string {
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if len(s) == 0 {
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return ""
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}
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regex := regexp.MustCompile(`[\W|_]+`)
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blankSpace := " "
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match := regex.ReplaceAllString(s, blankSpace)
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rs := strings.Split(match, blankSpace)
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var res []string
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for _, v := range rs {
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splitWords := splitWordsToLower(v)
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if len(splitWords) > 0 {
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res = append(res, splitWords...)
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}
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}
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return strings.Join(res, "-")
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}
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// SnakeCase 将字符串转为蛇形命名(snake_case)
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func SnakeCase(s string) string {
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if len(s) == 0 {
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return ""
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}
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regex := regexp.MustCompile(`[\W|_]+`)
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blankSpace := " "
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match := regex.ReplaceAllString(s, blankSpace)
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rs := strings.Split(match, blankSpace)
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var res []string
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for _, v := range rs {
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splitWords := splitWordsToLower(v)
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if len(splitWords) > 0 {
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res = append(res, splitWords...)
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}
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}
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return strings.Join(res, "_")
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}
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// Before 在字符首次出现的位置之前,在源字符串中创建子串
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func Before(s, char string) string {
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if s == "" || char == "" {
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return s
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}
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i := strings.Index(s, char)
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return s[0:i]
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}
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// BeforeLast 在字符最后出现的位置之前,在源字符串中创建子串
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func BeforeLast(s, char string) string {
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if s == "" || char == "" {
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return s
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}
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i := strings.LastIndex(s, char)
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return s[0:i]
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}
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// After 在字符首次出现的位置后,在源字符串中创建子串
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func After(s, char string) string {
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if s == "" || char == "" {
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return s
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}
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i := strings.Index(s, char)
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return s[i+len(char):]
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}
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// AfterLast 在字符最后出现的位置后,在源字符串中创建子串
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func AfterLast(s, char string) string {
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if s == "" || char == "" {
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return s
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}
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i := strings.LastIndex(s, char)
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return s[i+len(char):]
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}
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// IsString 检查值的数据类型是否为字符串
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func IsString(v any) bool {
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if v == nil {
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return false
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}
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switch v.(type) {
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case string:
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return true
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default:
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return false
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}
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}
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// ReverseStr 返回字符顺序与给定字符串相反的字符串
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func ReverseStr(s string) string {
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r := []rune(s)
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for i, j := 0, len(r)-1; i < j; i, j = i+1, j-1 {
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r[i], r[j] = r[j], r[i]
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}
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return string(r)
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}
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// Wrap 用另一个字符串包住一个字符串
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func Wrap(str string, wrapWith string) string {
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if str == "" || wrapWith == "" {
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return str
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}
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var sb strings.Builder
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sb.WriteString(wrapWith)
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sb.WriteString(str)
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sb.WriteString(wrapWith)
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return sb.String()
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}
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// Unwrap 从另一个字符串中解开一个给定的字符串,将改变str值
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func Unwrap(str string, wrapToken string) string {
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if str == "" || wrapToken == "" {
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return str
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}
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firstIndex := strings.Index(str, wrapToken)
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lastIndex := strings.LastIndex(str, wrapToken)
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if firstIndex == 0 && lastIndex > 0 && lastIndex <= len(str)-1 {
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if len(wrapToken) <= lastIndex {
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str = str[len(wrapToken):lastIndex]
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}
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}
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return str
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}
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// RemoveHTML 去除字符串中的 html, js
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func RemoveHTML(str string) string {
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if len(str) > 0 {
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//删除脚本
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reg := regexp.MustCompile(`([\r\n])[\s]+`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`<script[^>]*?>.*?</script>`)
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str = reg.ReplaceAllString(str, "")
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//删除HTML
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reg = regexp.MustCompile(`<(.[^>]*)>`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`([\r\n])[\s]+`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`-->`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`<!--.*`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(quot|#34);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(amp|#38);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(lt|#60);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(gt|#62);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(nbsp|#160);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(iexcl|#161);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(cent|#162);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(pound|#163);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&(copy|#169);`)
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str = reg.ReplaceAllString(str, "")
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reg = regexp.MustCompile(`&#(\d+);`)
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str = reg.ReplaceAllString(str, "")
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str = strings.ReplaceAll(str, "<", "")
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str = strings.ReplaceAll(str, ">", "")
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str = strings.ReplaceAll(str, "\n", "")
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str = strings.ReplaceAll(str, " ", "")
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str = strings.ReplaceAll(str, " ", "")
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return str
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}
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return ""
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}
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