multer/express/node.js图片上传实例

前端

<form enctype="multipart/form-data" method="post">
    <input type="file" id="avatar" name="avatar" />
    <button>提交</button>
</form>
<script>
    $(‘button‘).click(function () {
        var files = $(‘#avatar‘).prop(‘files‘);
        var data = new FormData();
        data.append(‘avatar‘, files[0]);
        $.ajax({
            url: ‘http://localhost:3000/uploadImg‘,
            type: ‘POST‘,
            data: data,
            cache: false,
            processData: false,
            contentType: false
        });
        return false;
    });
</script>

后台

首先要npm install multer --save

文件 /router/uploadImg.js

const path = require("path")

let multer = require(‘multer‘)

let storage = multer.diskStorage({
    destination : (req,file,cb)=>{
        //保存在public文件夹的upload文件夹里
        cb(null,path.join(__dirname, ‘../public/upload/‘))
    },
    filename:(req,file,cb)=>{
        cb(null,file.originalname)
    }
})

let upload = multer({ storage: storage })

router.post(‘/‘, upload.single(‘avatar‘), function (req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.send({
        code: 1, message: ‘successs‘
    })
})