nodejs批量裁剪图片尺寸大小

使用

$ node resetImage.js

依赖第三方库

$ npm install --save-dev sharp dotenv

代码

.env

# 图片存放的文件夹位置
AVATAR_PATH=./avatars/

# 裁剪图片存放的文件夹位置
SMALL_AVATAR_PATH=./small_avatars/

# 裁剪图片尺寸大小
SHARP_IMAGE_SIZE=200

# 非法图片汇总的文件
SURPLUS_IMAGE_PATH=surplusImage.txt

resetImage.js

const fs = require('fs')
const path = require('path')
const sharp = require('sharp')
require('dotenv').config()

// 忽略的文件
const IGNORE_FILE = ['.DS_Store']
const PNG_EXT = '.png'
const JPG_EXT = '.jpg'

const { AVATAR_PATH, SMALL_AVATAR_PATH, SHARP_IMAGE_SIZE, SURPLUS_IMAGE_PATH } = process.env

const fileList = fs.readdirSync(AVATAR_PATH)

if (!fs.existsSync(SMALL_AVATAR_PATH)) fs.mkdirSync(SMALL_AVATAR_PATH)

const savePngFile = (file, fileName) => sharp(`${AVATAR_PATH}${file}`).resize(Number(SHARP_IMAGE_SIZE)).png().toFile(`${SMALL_AVATAR_PATH}${fileName || file}`)

const surplusList = fileList.filter(file => {
  if (path.extname(file) === PNG_EXT) {
    savePngFile(file)
    // sharp(`${AVATAR_PATH}${file}`).resize(Number(SHARP_IMAGE_SIZE)).png().toFile(`${SMALL_AVATAR_PATH}${file}`)
  } else if (path.extname(file) === JPG_EXT) {
    // jpg格式转png格式保存
    const name = path.basename(file, JPG_EXT)
    savePngFile(file, `${name}${PNG_EXT}`)
    // sharp(`${AVATAR_PATH}${file}`).resize(Number(SHARP_IMAGE_SIZE)).jpeg().toFile(`${SMALL_AVATAR_PATH}${file}`)
  } else {
    // 不包括忽略文件并且不是文件夹，记录下来
    return !IGNORE_FILE.includes(file) && !fs.statSync(file).isDirectory()
  }
})

if (surplusList.length) fs.writeFileSync(SURPLUS_IMAGE_PATH, surplusList.join('\n'))