Teach you step by step how to use node.js to batch rename files/directories (practical combat)

How to batch rename files in Node.js project? This article will introduce to you how to batch rename files and folders using Node.js.

Node.js batch rename files/folders

In work and life, we often encounter the need to rename files. , it can still be done manually for a small number of files, but it is not that simple if there are too many files. [Recommended learning: "nodejs Tutorial"]

In the process of learning Node.js, I learned the file system module of Node.js, so let’s write one Tool function, one command, batch rename files and folders

Let’s briefly learn the built-in module of Node.js: File system

The file system module of Node.js

Node.js's built-in module: fs module, is a tool function used to process files and directories (folders), that is, File system

1. readFile function

fs module's readFile function: used to read the file content, call the callback function to transfer the parsed content

const { readFile } = require('fs')

readFile('iwin621.txt', 'utf8', (error, txt) => {
  if(error) throw error
  console.log('iwin621 的文本为: ', txt)
})

The first parameter of readFile is the file path, and the second parameter is the character encoding used to decode the file into a string.

If no encoding parameter is passed, Node.js will assume it is Buffer The object

Buffer is an array-like object that contains numbers representing the bytes in the file

2. writeFile function

The writeFile function is used to write the file Write to disk,

const { writeFile } = require('fs')

writeFile('iwin621.txt', '这是一串文本内容', err => {
  if(err) {
    console.log('写入文件错误: ', err)
  } else {
    console.log('File written..')
})

3. readdir function

readdir function is used to return the files in the directory, in the form of a string array

4. rename function

As the name suggests, the rename function is used to rename files

4. unlink function

The unlink function is used To delete a file

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