How to copy or move files using Golang?-Golang-php.cn

How to copy or move files using Golang?

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Release： 2024-06-05 13:46:56

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In Golang, you can use the os package to copy or move files: Copy files: Use io.Copy to copy the contents of the source file to the target file. Moving files: Use os.Rename to rename a source file to a target file, essentially moving the file.

如何使用 Golang 复制或移动文件？

How to copy or move files using Golang?

In Golang, files can be copied or moved by using the os package. Here is a code example of how to do it:

1. Copy file

package main

import (
    "io"
    "os"
)

func main() {
    srcFile, err := os.Open("source.txt")
    if err != nil {
        panic(err)
    }
    defer srcFile.Close()

    dstFile, err := os.Create("destination.txt")
    if err != nil {
        panic(err)
    }
    defer dstFile.Close()

    _, err = io.Copy(dstFile, srcFile)
    if err != nil {
        panic(err)
    }
}

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2. Move file

package main

import (
    "os"
)

func main() {
    err := os.Rename("source.txt", "destination.txt")
    if err != nil {
        panic(err)
    }
}

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Practical Case

In actual use, you can use the following code example to copy or move files:

package main

import (
    "context"
    "fmt"
    "io"
    "io/ioutil"
    "os"
)

func copyFile(src, dst string) error {
    srcFile, err := os.Open(src)
    if err != nil {
        return err
    }
    defer srcFile.Close()

    dstFile, err := os.Create(dst)
    if err != nil {
        return err
    }
    defer dstFile.Close()

    if _, err := io.Copy(dstFile, srcFile); err != nil {
        return err
    }

    return nil
}

func moveFile(src, dst string) error {
    if err := copyFile(src, dst); err != nil {
        return err
    }
    return os.Remove(src)
}

func main() {
    srcData := "Hello World!"
    err := ioutil.WriteFile("source.txt", []byte(srcData), 0644)
    if err != nil {
        panic(err)
    }

    // 复制文件
    if err := copyFile("source.txt", "destination1.txt"); err != nil {
        panic(err)
    }

    // 移动文件
    if err := moveFile("destination1.txt", "destination2.txt"); err != nil {
        panic(err)
    }

    // 检查是否成功
    dstData, err := ioutil.ReadFile("destination2.txt")
    if err != nil {
        panic(err)
    }
    fmt.Println(string(dstData)) // 输出："Hello World!"
}

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