1、文件拷贝:
package main
import (
"fmt"
"io"
"os"
)
func main() {
list := os.Args
if len(list) != 3 {
fmt.Println("输入给谁错误,格式为:xxx.go 源文件名 目标文件名")
return
}
w, err := CopyFile(list[1], list[2])
if err != nil {
fmt.Println(err)
return
}
fmt.Println("复制文件完成,文件大小为:", w)
}
func CopyFile(srcFileName, dstFileName string) (written int64, err error) {
srcFile, err := os.Open(srcFileName)
if err != nil {
return
}
defer srcFile.Close()
dstFile, err := os.OpenFile(dstFileName, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
return
}
defer dstFile.Close()
return io.Copy(dstFile, srcFile)
}
执行结果:
d:\goprojects\src\day1\练习>go run main.go d:\深入理解并行编程V1.0.pdf d:\test.pdf
复制文件完成,文件大小为: 4146835
d:\goprojects\src\day1\练习>