package main
import (
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
)
func dome01() {
file, err := os.Open("E:\\GOGO\\GOE\\dome01\\main.go")
if err != nil {
fmt.Println("das", err)
return
}
defer file.Close()
//var tmp = make([]byte, 128)
for {
var tmp [128]byte
//Read 只读
n, errors := file.Read(tmp[:])
if errors != nil {
fmt.Println("为二", errors)
return
}
fmt.Printf("读取了%d个字节", n)
fmt.Println()
fmt.Println(string(tmp[:n]))
if n < 128 {
return
}
}
}
// 利用bufio
func deme02() {
fileObj, err := os.Open("E:\\GOGO\\GOE\\dome01\\main.go")
if err != nil {
fmt.Println("第一", err)
return
}
defer fileObj.Close()
reder := bufio.NewReader(fileObj)
for {
line, errorr := reder.ReadString('\n')
if err == io.EOF {
return
}
if errorr != nil {
fmt.Printf("read err %d", errorr)
return
}
fmt.Println(line)
}
}
func dome03() {
ret, err := ioutil.ReadFile("E:\\GOGO\\GOE\\dome01\\main.go")
if err != nil {
fmt.Printf("123123", err)
}
fmt.Println(string(ret))
}
func main() {
dome03()
}