示例

package main
import (
	"fmt"
	"strings"
)
 
func main() {
	var str1 string = "hello"
	var str2 string = "world"
 
	fmt.Println(strings.Compare(str1,str2)) // -1
	fmt.Println(strings.Compare(str2,str1)) // 1
	fmt.Println(strings.Compare(str1,str1)) // 0
}
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检测字符串是否包含子串-Contains

func Contains(s,substr string) bool
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示例

package main
import (
	"fmt"
	"strings"
)
 
func main() {
	fmt.Println(strings.Contains("lxx is nb","lxx")) // true
	fmt.Println(strings.Contains("lxx is nb","pyy")) // false
}
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大小写转换

func ToUpper(substr string) string
func ToLower(substr string) string
func ToTitle(substr string) string //将字符修改为其Title格式，大部分字符的Title格式就是Upper格式，只有少数字符的Title格式是特殊字符
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示例

package main
 
import (
	"fmt"
	"strings"
)
 
func main() {
	var str1 string = "hello,lxx"
	fmt.Println(strings.ToUpper(str1)) // HELLO, GOLANG
	fmt.Println(strings.ToLower(str1)) // hello, golang
	fmt.Println(strings.ToTitle(str1)) // HELLO, GOLANG
}
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统计子字符串出现的次数

func Count(str,substr string) int
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示例

package main
 
import (
	"fmt"
	"strings"
)
 
func main() {
	var str1 string = "lxx is Nb, lxx is big，lxx is handsome"
	var str2 string = "lxx"
	fmt.Println(strings.Count(str1,str2))  //3 
}
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判断字符串的前后缀

func HasPrefix(str,substr string) bool
func HasSuffix(str,substr string) bool
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示例

package main

import (
	"fmt"
	"strings"
)

func main() {
	var str1 string = "lxx is handsome"
	var str2 string = "l"
	var str3 string = "lxx"
	var str4 string = "lxxi"
	fmt.Println(strings.HasPrefix(str1, str2)) // true
	fmt.Println(strings.HasPrefix(str1, str3)) // ture
	fmt.Println(strings.HasSuffix(str1, str4)) // false

}
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分割和连接

func Split(str,separator string) []string
func Join(strs []string) string
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示例

package main

import (
	"fmt"
	"strings"
)

func main() {
	var str1 string = "lxx is Nb,lxx is handsome"
	fmt.Println(strings.Split(str1, ",")) // [lxx is Nb      lxx is handsome]
	for _,v := range strings.Split(str1, ",") {
		fmt.Println(v)
	}
	fmt.Println(strings.Join([]string{"lxx","is","NB"}, " ")) // lxx is NB
}
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索引

这个操作能获取指定字符首次出现的位置，通常用来判断子字符串在对应字符串中的位置。

func Index(str,substr string) int
1

示例

package main

import (
	"fmt"
	"strings"
)

func main() {
	var str1 string = "lxx is Nb"
	fmt.Println(strings.Index(str1, "Nb")) // 7
}
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清洗

清洗操作可以将字符串两端的一些字符删掉，常用来删除字符串两端的空格。

func Trim(s, cutset string) string
func TrimLeft(s, cutset string) string
func TrimRight(s, cutset string) string
func TrimPrefix(s, prefix string) string
func TrimSuffix(s, suffix string) string
func TrimSpace(str string) string
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示例

package main

import (
	"fmt"
	"strings"
)

func main() {
	var str1 string = "   lxx is Nb  "
	var str2 string = "***lxx is Nb***"
	fmt.Println(strings.Trim(str1, " ")) // lxx is Nb
	fmt.Println(strings.Trim(str2, "*")) //lxx is Nb
	// 专门用来清除两端空格的函数
	fmt.Println(strings.TrimSpace(str1)) // lxx is Nb
	fmt.Println(strings.TrimRight(str1," ")) //    lxx is Nb
}
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替换

清洗操作只能完成首尾的空格或者指定字符的替换，要完成更为复杂的操作则要调用NewReplacer()函数。

func Replace(s, old, new string, n int) string {}
func NewReplacer(oldnew ...string) *Replacer 
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示例

package main

import (
	"fmt"
	"strings"
)

func main() {
	var str1 string = "www.cnblogs.com/lxx/p/15996060.html"
	newReplacer1 := strings.NewReplacer("/",":")
	fmt.Println(newReplacer1.Replace(str1)) //www.cnblogs.com:lxx:p:15996060.html

}
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