具体使用,请看代码
package main

//需要导入字符串操作包strings
import (
   "fmt"
   "strings"
)

func main() {
   s1 := "stevennamezhao"

   //Contains的使用:判断是否含有字串,在就返回true
   //Contains(s string ,str string)bool
   fmt.Println(strings.Contains(s1, "name"))

   //Join:把字符串通过sep(符号)连接在slice切片后面,返回一个string
   //func Join(a []string, sep string) string
   slice := []string{"qww", "steven", "zhao"}
   s2 := strings.Join(slice, "@")
   fmt.Println(s2) //qww@steven@zhao

   //index:z在主串中查找字串的索引位置
   //func Index(s, substr string) int
   index := strings.Index(s1, "name")
   fmt.Println(index) //6

   //repeat:重复字符串count次,并返回字符串中
   //func Repeat(s string, count int) string
   s3 := "steven is a good person"
   s3 = strings.Repeat(s3, 3)
   fmt.Println(s3) //steven is a good personsteven is a good personsteven is a good person

   //replace:替换字符串的特定字符,n,表示替换的个数,-1表示全部替换
   //func Replace(s, old, new string, n int) string
   s3 = strings.Replace(s3, "steven", "zhao", -1)
   fmt.Println(s3) //zhao is a good personzhao is a good personzhao is a good person

   //split:把字符串按照sep(规则)分割
   //func Split(s, sep string) []string
   s4 := "steven and zhao are good people"
   s5 := strings.Split(s4, " ") //以空格分割,返回的是一个切片
   fmt.Println(s5)

   //trim:在字符串的头部和尾部,去除cutset指定字符串()去除两边含有连续的的cutset字符
   //func Trim(s string, cutset string) string

   s6 := strings.Trim(s4, "stel")
   fmt.Println(s6) //ven and zhao are good peop

   //fields;去除字符串中的空格,并按照空格分隔返回
   //func Fields(s string) []string
   s7 := strings.Fields(s4) //返回的是切片
   fmt.Println(s7)          //[steven and zhao are good people]
}