如何将不同子文件夹中的文件重命名为同名并保留原扩展名？

Got it, let's solve this problem. You need to rename every file in subfolders under C:\Workspace to a consistent base name (like scan) while keeping their original file extensions. Below are a few practical methods tailored for different tools you might prefer:

Method 1: PowerShell (Windows Built-in, No Extra Tools) #

PowerShell is the easiest built-in option for Windows. This script will rename all files in your target subfolders, and includes a safety check to avoid overwriting files if a subfolder has multiple files with the same extension.

Basic Version (Overwrites duplicate extensions) #

Use this only if you're sure each subfolder has exactly one file:

Get-ChildItem -Path "C:\Workspace" -File -Recurse | ForEach-Object {
    $newFileName = "scan$($_.Extension)"
    Rename-Item -Path $_.FullName -NewName $newFileName
}

Safe Version (Avoids Overwrites) #

If subfolders might have multiple files, this adds a counter (e.g., scan-1.jpg, scan-2.jpg) to prevent overwriting:

Get-ChildItem -Path "C:\Workspace" -File -Recurse | ForEach-Object {
    $baseName = "scan"
    $extension = $_.Extension
    $targetPath = Join-Path -Path $_.DirectoryName -ChildPath "$baseName$extension"
    
    # Add counter if file already exists
    $counter = 1
    while (Test-Path -Path $targetPath) {
        $targetPath = Join-Path -Path $_.DirectoryName -ChildPath "$baseName-$counter$extension"
        $counter++
    }
    
    Rename-Item -Path $_.FullName -NewName $targetPath
}

How it works: #

• Get-ChildItem -File -Recurse : Scans all files (not folders) in C:\Workspace and its subfolders
• $_.Extension : Grabs the original file's extension (e.g., .jpg, .doc)
• The loop checks if the new filename already exists, and appends a counter if needed

Method 2: Batch Script (Windows Command Prompt) #

If you prefer using Command Prompt, this batch script does the same job. Again, we'll include a safe version to avoid overwrites.

Basic Version (Overwrites duplicates) #

@echo off
set "root=C:\Workspace"
set "newBase=scan"

for /r "%root%" %%f in (*) do (
    ren "%%f" "%newBase%%%~xf"
)

Safe Version (Avoids Overwrites) #

@echo off
setlocal enabledelayedexpansion
set "root=C:\Workspace"
set "newBase=scan"

for /r "%root%" %%f in (*) do (
    set "ext=%%~xf"
    set "folder=%%~dpf"
    set "newFile=!folder!!newBase!!ext!"
    set "counter=1"
    
    :checkExists
    if exist "!newFile!" (
        set "newFile=!folder!!newBase!-!counter!!ext!"
        set /a counter+=1
        goto checkExists
    )
    
    ren "%%f" "!newFile!"
)
endlocal

How it works: #

• for /r "%root%" %%f in (*) : Recursively loops through all files in the target directory
• %%~xf : Extracts the file's extension
• enabledelayedexpansion : Lets us update variables inside the loop (critical for the counter logic)

Method 3: Python Script (Cross-Platform) #

If you need a solution that works on Windows, Linux, or macOS, a Python script is perfect. It also includes built-in overwrite protection.

import os

# Set your target directory and desired base name
root_directory = r"C:\Workspace"
target_base_name = "scan"

# Walk through all subfolders and files
for dir_path, _, file_names in os.walk(root_directory):
    for file_name in file_names:
        # Split the file name and extension
        _, file_ext = os.path.splitext(file_name)
        new_file_name = f"{target_base_name}{file_ext}"
        old_file_path = os.path.join(dir_path, file_name)
        new_file_path = os.path.join(dir_path, new_file_name)
        
        # Add counter if the file already exists
        counter = 1
        while os.path.exists(new_file_path):
            new_file_name = f"{target_base_name}-{counter}{file_ext}"
            new_file_path = os.path.join(dir_path, new_file_name)
            counter += 1
        
        # Rename the file
        os.rename(old_file_path, new_file_path)

How it works: #

• os.walk(root_directory) : Traverses every subfolder and file in the target directory
• os.path.splitext(file_name) : Separates the file name from its extension
• The while loop checks for existing files and appends a counter until a unique name is found

Important Notes: #

1. Backup first! Always make a copy of your files before running any bulk rename script—mistakes can't be undone easily.
2. Test with a small folder first : Run the script on a test subset of your files to make sure it behaves as expected.

内容的提问来源于stack exchange，提问作者Syafiq Latif