需要使用io包的Copy方法
package mainimport (
"fmt"
"io"
"os"
)//自己编写一个函数,接收两个文件路径 srcFileName dstFileName
func CopyFile(dstFileName string,srcFileName string) (written int64,err error) {srcFile,err := os.Open(srcFileName) if err != nil { fmt.Printf("open file err = %v\n",err) return } defer srcFile.Close() //打开dstFileName dstFile,err := os.OpenFile(dstFileName,os.O_WRONLY | os.O_CREATE,0755) if err != nil { fmt.Printf("open file err = %v\n",err) return } defer dstFile.Close() return io.Copy(dstFile,srcFile)
}
func main() {
result,err := CopyFile("./src/main/dst.png","./src/main/file.png") if err == nil { fmt.Println("拷贝成功!,拷贝的字节数为: ",result) }
}
还可以使用下面的方法
package mainimport (
"bufio"
"fmt"
"io"
"os"
)//自己编写一个函数,接收两个文件路径 srcFileName dstFileName
func CopyFile(dstFileName string,err)
return
}defer srcFile.Close() //通过srcFile,获取到Reader reader := bufio.NewReader(srcFile) //打开dstFileName dstFile,0666) if err != nil { fmt.Printf("open file err = %v\n",err) return } writer := bufio.NewWriter(dstFile) defer func() { writer.Flush() //把缓冲区的内容写入到文件 dstFile.Close() }() return io.Copy(writer,reader)
}
func main() {
result,"./src/main/file.png") if err == nil { fmt.Println("拷贝成功!拷贝的字节大写为: ",result) }
}