添加字符串到文件末尾
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package main
import (
"fmt"
"os"
)
func main() {
// 用读写的方式打开文件
file, err := os.OpenFile("input.txt", os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
panic(err)
}
defer file.Close()
if _, err = file.WriteString(" 这是添加的内容"); err != nil {
panic(err)
}
fmt.Println("已成功添加")
}
golang http://golang.org/src/pkg/os/file.go 里定义的相关参数：
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const (
O_RDONLY int = syscall.O_RDONLY // open the file read-only.
O_WRONLY int = syscall.O_WRONLY // open the file write-only.
O_RDWR int = syscall.O_RDWR // open the file read-write.
O_APPEND int = syscall.O_APPEND // append data to the file when writing.
O_CREATE int = syscall.O_CREAT // create a new file if none exists.
O_EXCL int = syscall.O_EXCL // used with O_CREATE, file must not exist
O_SYNC int = syscall.O_SYNC // open for synchronous I/O.
O_TRUNC int = syscall.O_TRUNC // if possible, truncate file when opened.
)
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