GO字符串练习题实例代码

package main

import "fmt"

func main() {
	s := "110101199001011234"
	fmt.Print(s[6:10], s[14:18])
}

package main

import "fmt"

func main() {
	s := "忠诚铸魂，勤奋立业，创新强国，奉献为民"
	s1 := []rune(s)
	fmt.Print(string(s1[0:2]), string(s1[5:7]), string(s1[10:12]), string(s1[15:17]))
}

package main

import (
	"fmt"
	"strings"
)

func main() {
	// 定义订单编号组成部分
	prefix := "ORD"
	date := "20260310"
	randomNum := 8899
    // 1. 加号方式拼接
    fmt.Println(prefix + "-" + date + "-" + strconv.Itoa(randomNum))

	// 2. Sprintf方式拼接订单号
	orderIdSprintf := fmt.Sprintf("%s-%s-%d", prefix, date, randomNum)
	fmt.Printf("Sprintf生成订单号：%s\n", orderIdSprintf)

	// 3. Builder方式逐段拼接
	var builder strings.Builder
	builder.WriteString(prefix)
	builder.WriteString("-")
	builder.WriteString(date)
	builder.WriteString("-")
	builder.WriteString(fmt.Sprintf("%d", randomNum))
	orderIdBuilder := builder.String()
	fmt.Printf("Builder生成订单号：%s\n", orderIdBuilder)
}

package main

import (
	"fmt"
	"strings"
)

func main() {
	// 定义日志片段
	logPart1 := "【INFO】"
	logPart2 := "服务启动："
	logPart3 := "api-server"
	logPart4 := "端口：8080"

	// 1. Sprintf方式拼接长文本
	logSprintf := fmt.Sprintf("%s%s%s %s", logPart1, logPart2, logPart3, logPart4)
	fmt.Printf("Sprintf拼接日志：%s\n", logSprintf)

	// 2. Builder方式逐段拼接
	var builder strings.Builder
	builder.WriteString(logPart1)
	builder.WriteString(logPart2)
	builder.WriteString(logPart3)
	builder.WriteString(" ")
	builder.WriteString(logPart4)
	logBuilder := builder.String()
	fmt.Printf("Builder拼接日志：%s\n", logBuilder)
}

package main

import (
	"fmt"
	"strings"
)

func main() {
	tags := "基础,进阶,实战"
	// 分割
	tagSlice := strings.Split(tags, ",")
	// 拼接
	joinTags := strings.Join(tagSlice, "|")
	
	fmt.Printf("拼接后标签：%s\n", joinTags)
}

package main

import (
	"fmt"
	"strings"
)

func main() {
	text := "学习Go，用好Go"
	// 判断包含
	hasGo := strings.Contains(text, "Go")
	// 替换所有（n=-1）
	replaceText := strings.Replace(text, "Go", "Go语言", -1)
	
	fmt.Printf("包含\"Go\"：%t\n", hasGo)
	fmt.Printf("替换后：%s\n", replaceText)
}