解析form表單插件 formidable

例子：

前臺(tái) html:

//form表單提交(頁(yè)面會(huì)刷新)
<form action="http://127.0.0.1:3000/test" method="post" enctype="multipart/form-data">
    <input type="file" id="" name="upload" multiple="multiple"/> <br />
    <input type="text" name="username"/>
    <input type="submit" value="Upload" />
</form>

//ajax提交from表單（無(wú)頁(yè)面刷新）
<form id="uploadForm">
    <input type="file" id="upload" name="upload" multiple="multiple"/> <br />
    <input type="text" name="username"/>
    <input type="button" value="上傳" onclick='shangchuan()'/>
</form>
<script src='http://libs.baidu.com/jquery/2.1.1/jquery.min.js'></script>
<script type="text/javascript">
    function shangchuan(){
        var formData = new FormData($("#uploadForm")[0]);
        $.ajax({
            url: 'http://127.0.0.1:3000/test' ,
            type: 'POST',
            data: formData,
            async: false,
            cache: false,
            contentType: false,
            processData: false,
            success: function (value) {
               console.log(value)
            },
            error: function (err) {
                console.log(err)
            }
        });
    }
</script>

服務(wù)端 node（返回上傳文件路徑名）

exports.test = function (req, res) {
var form = new formidable.IncomingForm();
    form.encoding = 'utf-8'
    form.keepExtensions = true //保留后綴名
    form.uploadDir = "./public/" //上傳路徑
    form.multiples = true; //多圖上傳
//多文件存儲(chǔ)到 files
    var files = []
    form.on('file', function (filed, file) {
        files.push([filed, file]);
    })
//解析form表單 fields為表單中非文件內(nèi)容   files為文件信息
    form.parse(req, function (err, fields, files) {
        console.log(fields)
        var paths = []
//單文件
        if (typeof(files.upload.length) === "undefined") {
           let path = files.upload.path.replace(/public/g, '')
            path = config + path.replace(/\\/g, '/')
            paths.push(path)
            res.json({paths: paths})
        } else {
//多文件
            for (let i = 0; i < files.upload.length; i++) {
               let path = files.upload[i].path.replace(/public/g, '')
                path = config + path.replace(/\\/g, '/')
                paths.push(path)
            }
            res.json({paths: paths})
        }
    })
}

//解析base64,上傳圖片（前臺(tái)向后臺(tái)傳base64數(shù)組）
function upload(req,res){
        var imgs=req.body.imgs
        var paths=[]
        for(var i=0;i<imgs.length;i++){
            //將前臺(tái)傳來(lái)的base64數(shù)據(jù)去掉前綴
            var img = imgs[i].replace(/^data:image\/\w+;base64,/, '');
            var imgBuffer = new Buffer(img, 'base64');
            var path = 'public/images'+ Date.now() +'.png'
            paths.push(path)
            //寫入文件
            fs.writeFile(path, imgBuffer,function(err,date){
                if(err){
                    console.log(err)
                }
                if(paths.length==imgs.length){
                    res.json({code:200,result:paths})
                }
            });
        }
    }

以前用Java寫過(guò)圖片上傳，一對(duì)比，感覺node要比Java寫上傳簡(jiǎn)單點(diǎn)，formidable詳細(xì)配置請(qǐng)看官方文檔