Golang 的一些常见字符串问题及解决方案

本文总结了 go 语言中对字符串的常见操作示例，这些示例都是在日常开发中经常会遇到的 go 语言字符串操作，也可以更好的理解 go 语言的 strings 包。

Go语言获取字符串长度

package main

import (
	"fmt"
)

func main() {
	s := "Hello,www.02405.com!"
	l := len(s)
	fmt.Println(l)
}

输出：20

Go语言拆分字符串

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "Hello! our site's url is https://www.02405.com"
	a := strings.Split(s, " ")
	for _, value := range a {
		fmt.Println(value)
	}
}

输出：

Hello!
our
site's
url
is
https://www.02405.com

Go语言使用正则表达式拆分字符串

package main

import (
	"fmt"
	"regexp"
)

func main() {
	s := "Hello! our site's url is https://www.02405.com"
	r := regexp.MustCompile("[0-9]+")
	st := r.Split(s, -1)
	fmt.Print(st[1])
}

输出：.com

Go语言检查字符串中是否包含指定字符串

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "Hello! our site's url is https://www.02405.com"
	t := strings.Contains(s, "02405")
	f := strings.Contains(s, "零五网")
	fmt.Println(t, f)
}

输出：true false

Go语言获取字符串中指定字符（串）的索引位置

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "Hello! our site's url is https://www.02405.com"
	i := strings.Index(s, "02405")
	fmt.Println(i)
}

输出：37

Go语言将字符串数组连接成字符串

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := []string{"Hello!", "our", "site's", "url", "is", "https://www.02405.com"}
	l := strings.Join(s, " ")
	fmt.Println(l)
}

输出：Hello! our site's url is https://www.02405.com

Go语言将字符串替换

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "Hello! Our site's url is https://www.02405.com!"
	l := strings.Replace(s, "!", ",", 1)
	l1 := strings.Replace(s, "!", ",", -1)
	fmt.Println(l)
	fmt.Println(l1)
}

输出：

Hello, Our site's url is https://www.02405.com!
Hello, Our site's url is https://www.02405.com,

Go语言字符串大小写转换

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "Hello! Our site's url is https://www.02405.com."
	l := strings.ToLower(s)
	u := strings.ToUpper(s)
	fmt.Println(l)
	fmt.Println(u)
}

输出：

hello! our site's url is https://www.02405.com.
HELLO! OUR SITE'S URL IS HTTPS://WWW.02405.COM.