來(lái)源：https://github.com/xg-wang/gobyexample/tree/master/examples
package main
import (
"bufio"
"fmt"
"io/ioutil"
"os"
)
func check(e error) {
if e != nil {
panic(e)
}
}
func main() {
//寫入一個(gè)字符串（或者只是一些字節(jié)）到一個(gè)文件
d1 := []byte("hello\ngo\n")
err := ioutil.WriteFile("D:/goworkspace/src/gobyexample/writing-files/dat1.txt", d1, 0644)
check(err)
//對(duì)于更細(xì)粒度的寫入蒸矛，先打開(kāi)一個(gè)文件
f, err := os.Create("D:/goworkspace/src/gobyexample/writing-files/dat2.txt")
check(err)
//打開(kāi)文件后叠赐，習(xí)慣立即使用 defer 調(diào)用文件的`Close`操作
defer f.Close()
//可以寫入字節(jié)切片
d2 := []byte{115, 111, 109, 101, 10} //some\n
n2, err := f.Write(d2)
check(err)
fmt.Printf("wrote %d bytes\n", n2)
n3, err := f.WriteString("writes\n")
fmt.Printf("wrote %d bytes\n", n3)
//調(diào)用 `Sync` 來(lái)將緩沖區(qū)的信息寫入磁盤
f.Sync()
w := bufio.NewWriter(f)
n4, err := w.WriteString("buffered\n")
fmt.Printf("wrote %d bytes\n", n4)
//使用`Flush`來(lái)確保所有緩存的操作已寫入底層寫入器
w.Flush()
}
輸出結(jié)果
wrote 5 bytes
wrote 7 bytes
wrote 9 bytes
