go语言学习例子No.12-从单个文本文件里匹配结果输出到新的文件中

package main

import (
	"fmt"
	"io/ioutil"
	"regexp"
)

func main() {
	result, _ := ioutil.ReadFile("C:\\Users\\Administrator\\Desktop\\sa.txt")     //路径
	reg := `(?U:mfc-[\S\s]{26}@quickstart-1595298797248.iam.gserviceaccount.com)` //正则表达式
	rep := regexp.MustCompile(reg)                                                //匹配正则
	finalslice := rep.FindAllString(string(result), -1)                           //找到结果
	var finalstring string
	for _, v := range finalslice { //遍历切片
		finalstring = finalstring + v + "\n" //字符串拼接+换行
	}
	fmt.Println("获取到", len(finalslice), "条信息")

	ioutil.WriteFile("abc.txt", []byte(finalstring), 0777) //写入到文件
}