文件server_files.js：
const express = require('express')
const bodyParser = require('body-parser')
const multer = require('multer')
const path = require('path')
var fs = require('fs')
var server = express();
server.listen(8080)
var objMulter = multer({dest:'./www/upload/'});//文件存的位置
server.use( bodyParser.urlencoded({extended:false}))//使用bodyParser解析
server.use(objMulter.any())//any代表所有文件
server.post('/',function(req,res){
var newName = req.files[0].path + path.parse(req.files[0].originalname).ext;//获得需要更换成的name
console.log(newName)
fs.rename(req.files[0].path,newName,function(err){
if(err){ res.send('失败') }else{ res.send('成功') }
})
})
html上传文件：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="http://localhost:8080" method="post" enctype="multipart/form-data">
文件:<input type="file" name="f1"value="选择文件">
<input type="submit" value="tijoa">
</form>
</body>
</html>