原文地址：http://www.cjavaphp.com/q/answers-how-to-get-rid-of-connect-3-0-deprecation-alert-19581146.html
step 1: use each parser directly instead of app.use(express.bodyParser());
app.use(express.json());
app.use(express.urlencoded());
step 2: use a different multipart parser, for e.g: connect-multiparty can be used
app.use(require('connect-multiparty')())
work on connect 3 and express 4 hasn't begun yet because node 0.12 is taking a while to be released. there's nothing to update, yet.
原文地址：http://expressjs-book.com/forums/topic/replacement-for-bodyparser-connect-multipart/
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var multer = require('multer');
app.use(express.json());
app.use(express.urlencoded());
app.use(multer({ dest: './uploads/' }));