Using Node to Implement a Batch Rename File Function

Preface

The other day, while having lunch, I suddenly remembered that when I was taking the JS course at the New Great University, the teacher mentioned when talking about node that node can rename files in batches, so I thought about whether I could implement this feature.

After reading the official documentation of node, I found that the fs module has a readdir API, which reads the contents of a directory, tested it, and the returned result is an array, with the elements being the names of the folders. For more details, please refer to: https://www.oldtoolbag.com/article/58609.htm

There is also an API, rename, which is related to renaming. For more details, please refer to: https://www.oldtoolbag.com/article/58548.htm

Implementation idea

It's simple to organize the thoughts, just read the original file name into an array first, and then take the new name as an array, use renameAPI to implement it, but the names for batch renaming can only follow the number +1 I wrote the following function according to the rule

Example code

//rename.js
const fs = require('fs') //Introduce the built-in file system of node
function rename() {
 let newName = []
 fs.readdir('.',/file/', (err, oldName) => { //Read the names of the files in the file folder, oldName is an array
 if (err) {
  console.log(err)
 }
 for (let i = 0; i < oldName.length; i++) {
  let name = `new${i}.jpg` // Take the picture as an example
  newName[i] = name  // Assign the name to a new array
 }
 for (var i = 0; i < oldName.length; i++) {
  let oldPath = `./file/${oldName[i]}` //Original Path
  let newPath = `./file/${newName[i]}` //New Path
  fs.rename(oldPath, newPath, (err) => { //Rename
  if (err) {
   console.log(err)
  }
  console.log('done!')
  }
 }
 }
}
rename()

File Directory

Place the files to be renamed in the file folder.

Open the terminal, cd to the rename folder, and execute node rename.js.

This is just a simple implementation, and there are still many shortcomings. Better methods are welcome for discussion.

Summary

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