Shulou(Shulou.com)06/02 Report--

This article will explain in detail how golang implements file operation. Xiaobian thinks it is quite practical, so share it with you for reference. I hope you can gain something after reading this article.

1. Copy of documents:

package mainimport ( "fmt" "io" "os" "strings")func main() { list := os.Args if len(list) != 3 { fmt.Println("Wrong input for whom, format: xxx.go source filename destination filename") return } fmt.Println("Source file path:", list[1], " ", "Destination file path:", list[2]) fmt.Println("Please confirm press Yy to continue: ") str := "" fmt.Scanln(&str) if strings.ToLower(str) == "y" { w, err := CopyFile(list[1], list[2]) if err != nil { fmt.Println(err) return } fmt.Println("Copy file complete, file size: ", w) } else { fmt.Println("User terminated action! ") }}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)}

Implementation results:

d:\goprojects\src\day1\Exercise>go run main.go d:\Understanding Parallel Programming V1.0.pdf d:\test.pdf Source file path: d:\Understanding Parallel Programming V1.0.pdf Target file path: d:\test. pdfPlease confirm press Yy to continue: y Copy file completed, file size: 4146835d:\goprojects\src\day1\Exercise>go run main.go d:\Deep understanding parallel programming V1.0.pdf d:\test. pdfSource file path: d:\Deep understanding parallel programming V1.0.pdf Destination file path: d:\test. pdfPlease confirm press Yy to continue: nUser terminated operation! d:\goprojects\src\day1\Exercise> About "golang how to achieve file operation" This article is shared here, I hope the above content can be of some help to everyone, so that you can learn more knowledge, if you think the article is good, please share it to let more people see.

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