nodejs上传图片功能

var express = require('express');
var router = express.Router();
var fs=require("fs")

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});




router.get("/upload",(req,res)=>{
    res.render("upload");
})

router.post("/upload",(req,res)=>{
    console.log(req.files);
    //传一张
    // var file = req.files[0];
    
    // var oldPath = "public/"+file.filename;
    // var newPath = "public/"+file.filename +".jpg";
    // fs.rename(oldPath,newPath,(err,data)=>{
    //  if(err){
    //      console.log("修改名称失败");
    //      res.send("上传成功 修改失败");
    //  }else {
    //      console.log("修改成功");
    //      res.send("上传加修改名称成功");
    //  }
    // })

    // 传多张
    "use strict";
    for(let i=0;i<req.files.length;i++){        
        var file=req.files[i];
        var oldPath = "public/"+file.filename;
        var newPath = "public/"+file.filename +".jpg";
        var result=fs.renameSync(oldPath,newPath);
        if(result==undefined){
            if(i==req.files.length-1){
                res.send("所有图片上传成功")
              }
           }else{
                res.send(`第${i}图片上传成功`);
            }
                
        }
    

})

module.exports = router;