go ioutil.ReadFile 和ioutil.WriteFile

ioutil.WriteFile

package main

import (
	"fmt"
	"io/ioutil"
)

func main(){
	str := "hello world \n世界和平"
	err := ioutil.WriteFile("./test.txt",[]byte(str),0755)
	if err != nil {
		fmt.Println("open file failed err",err)
		return
	}
}

ioutil.ReadFile

package main

import (
	"fmt"
	"io/ioutil"
)

func main(){
	// ioutil封装了for{}循环,可以直接读取整个文件,返回整个文件内容到切片中
	//content,err := ioutil.ReadFile("./main.go")
	content,err := ioutil.ReadFile("D:\\GOPATH\\src\\MyProject\\pingguoxueyuan\\gostudy\\listen15\\ioutil\\main.go")
	if err != nil {
		fmt.Println("read file failed ,err: err")
		return
	}
	fmt.Println(content) // 字节的切片[]uint8
	fmt.Printf("content的类型:%T\n",content) // content的类型:[]uint8
	fmt.Println(string(content))  // string 把[]uint8切片转化为 string
}

标签：ioutil,err,fmt,ReadFile,content,WriteFile,go,main
来源： https://www.cnblogs.com/heris/p/16030261.html