Go language file renaming guide

How to rename files in Go language? Use the os.Rename function, which accepts the old filename and the new filename as parameters. Use filepath.Join to join path elements and create a new file path. Practical case: Use the os.Rename function to rename the file named file1.txt to file2.txt, located in the data directory.

Go Language File Renaming Guide

Renaming files is a common task for file operations in the Go language. This guide will introduce several effective ways to rename files, including practical examples.

Method 1: Using os.Rename

The os.Rename function is the primary method for renaming files. It accepts two parameters: old filename and new filename.

package main

import (
    "fmt"
    "os"
)

func main() {
    err := os.Rename("old-file.txt", "new-file.txt")
    if err != nil {
        fmt.Println(err)
    }
}

Method 2: Using filepath.Join

In some cases, you need to use the file path to rename the file. The filepath.Join function can be used to join path elements and create a new file path.

package main

import (
    "fmt"
    "os"
    "path/filepath"
)

func main() {
    oldPath := "data/old-file.txt"
    newPath := "data/new-file.txt"
    err := os.Rename(oldPath, newPath)
    if err != nil {
        fmt.Println(err)
    }
}

Practical case

The following is a practical case showing how to use os.Rename to rename a file:

package main

import (
    "fmt"
    "os"
)

func main() {
    dir := "data"
    oldName := "file1.txt"
    newName := "file2.txt"

    // 检查是否存在要重命名的文件
    if _, err := os.Stat(filepath.Join(dir, oldName)); err != nil {
        fmt.Println("File not found")
        return
    }

    // 执行重命名操作
    err := os.Rename(filepath.Join(dir, oldName), filepath.Join(dir, newName))
    if err != nil {
        fmt.Println(err)
        return
    }

    fmt.Println("File successfully renamed")
}

By following this guide, you can easily rename files in Go language.

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