Go语言学习笔记之文件读写操作详解

package main
 
import (
    "bufio"
    "fmt"
    "io"
    "os"
)
 
//写文件
func DoWriteFile() error {
    _filePath := "./test.txt"
    _file, _err := os.OpenFile(_filePath, os.O_WRONLY|os.O_CREATE, 0666)
    if _err != nil {
        fmt.Printf("打开文件错误=%v\n", _err)
        return _err
    }
    //提前关闭文件
    defer _file.Close()
    //写入文件
    _writer := bufio.NewWriter(_file)
    _writer.WriteString("hahaha!\n")
    _writer.Flush()
    return nil
}
 
 
func main() {
    DoWriteFile()
}

package main
 
import (
    "bufio"
    "fmt"
    "io"
    "os"
)
 
//读文件
func DoReadFile() error {
    _filePath := "./test.txt"
    _file, _err := os.Open(_filePath)
    if _err != nil {
        fmt.Printf("打开文件错误=%v\n", _err)
        return _err
    }
    defer _file.Close()
    _reader := bufio.NewReader(_file)
    for true {
        str, err := _reader.ReadString('\n')
        if err == io.EOF {
            break
        }
        fmt.Println(str)
    }
    return _err
}
 
func main() {
    DoReadFile()
}