我有一个node-js服务器，其中包括bodyparser和所有内容：
var express = require('express');
var dbcon = require('./app/db/databaseconnection');
var bodyParser = require('body-parser');
var app = express();
var router = express.Router();
var filepath = __dirname + '/views/';
app.set('view engine', 'ejs');
app.use(express.static(__dirname + '/public'));
app.use('/', router);
app.use(bodyParser);
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
app.use('*', (request, response) => response.render(filepath + '404', { page_name: '404' }));
// var results = dbcon.getProducts().then(results => {
// return results;
// }).catch(err => { console.log(err) })
//ejs.render(store , { results });
router.get('/', (request, response) => response.render(filepath + 'index', { page_name: 'home' }));
router.get('/store', (request, response) => {
return dbcon.getProducts().then(results => {
return response.render(filepath + 'store', { page_name: 'store', products: results });
});
});
router.get('/product', (request, response) => {
return dbcon.getProductDetails().then(results => {
return response.render(filepath + 'product', { page_name: 'product', products: results, req: request });
});
});
router.get('/purchase', (request, response) => {
return dbcon.getProductDetails().then(results => {
response.render(filepath + 'purchase', { page_name: 'purchase', products: results, req: request, res: response });
});
});
router.post('/purchase', (request, response) => {
//return dbcon.createCustomer(request.body.fname, request.body.lname, request.body.address, request.body.city, request.body.state, request.body.country, request.body.zip, request.body.phone, request.body.cardnumber, request.body.cardtype, request.body.expirationdate, request.body.securitycode, request.body.cardaddress, request.body.productID);
console.log(request.body.name);
response.redirect('/receipt');
});
router.get('/receipt', (request, response) => response.render(filepath + 'receipt', { page_name: 'receipt' }));
router.get('/about', (request, response) => response.render(filepath + 'about', { page_name: 'about' }));
router.get('/contact', (request, response) => response.render(filepath + 'contact', { page_name: 'contact' }));
router.get('/build', (request, response) => response.render(filepath + 'build/build'));
router.get('/learn', (request, response) => response.render(filepath + 'learn/learn'));
app.listen(3000, () => console.log("Server running at Port 3000"));
我还有一个ejs页面，其中包含以下形式：
<!DOCTYPE html>
<html>
<head>
<title>PC Store | Purchase</title>
<% include partials/header %>
<link rel="stylesheet" link="/css/purchaseCanvas.css" />
<script src="/js/toggleCountries.js"></script>
</head>
<body>
<header>
<% include partials/navbar %>
</header>
<main>
<div class="container">
<h1 align="center">Order</h1>
<div class="orderproduct center">
<% for (var i = 0; i < products.length; i++) {
//console.log(products[i]);
if (products[i].model == req.query.product) { %>
<h4>Product: </h4>
<img src="/img/productImages/<%= products[i].image01 %>" width="100">
<h5>Brand: <%= products[i].brand %></h5>
<h5>Model: <%= products[i].model %></h5>
<h5>Series: <%= products[i].series %></h5>
<h5>Price: $<%= products[i].price %></h5>
<input type="hidden" id="productID" name="productID" value="<%= products[i].productID %>">
<hr>
<% }} %>
</div>
<form action="/purchase" method="post">
<div class="canvas">
<br><br>
<div class="center">
<input type="text" class="form-control" id="fname" name="fname" placeholder="First Name" required>
<p id="fnameError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="lname" name="lname" placeholder="Last Name" required>
<p id="lnameError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="address" name="address" placeholder="Shipping Address" required>
<p id="addressError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="city" name="city" placeholder="City" required>
<p id="cityError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id="country" name="country"></select>
<p id="countryError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id ="state" name="state">
<option value="-1">Select State</option>
</select>
<p id="stateError" class="errorText"></p>
</div> <br>
<script>populateCountries("country", "state");</script>
<div class="center">
<input type="text" class="form-control" id="zip" name="zip" placeholder="Zip Code" required>
<p id="zipError" class="errorText"></p>
</div><br>
<div class="center">
<input type="tel" class="form-control" id="phone" name="phone" placeholder="Phone Number" required>
<p id="phoneError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="cardnumber" name="cardnumber" placeholder="Card Number" required>
<p id="cardnumberError" class="errorText"></p>
</div><br>
<div class="center">
<select class="form-control" id="cardtype" name="cardtype">
<option value="-1">Select Card Type</option>
<option value="Visa">Visa</option>
<option value="MasterCard">MasterCard</option>
<option value="American Express">American Express</option>
<option value="Discover">Discover</option>
</select>
<p id="cardtypeError" class="errorText"></p>
</div> <br>
<div class="center">
<input type="date" class="form-control" id="expirationdate" name="expirationdate" placeholder="Expiration Date" required>
<p id="expirationdateError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="securitycode" name="securitycode" placeholder="Security Code" required>
<p id="securitycodeError" class="errorText"></p>
</div><br>
<div class="center">
<input type="text" class="form-control" id="cardaddress" name="cardaddress" placeholder="Billing Address" required>
<p id="cardaddressError" class="errorText"></p>
</div><br>
<div class="center">
<input type="submit" class="btn btn-primary" value="Order">
</div>
</div>
</form>
</div>
</main>
<footer>
<% include partials/footer %>
</footer>
</body>
</html>
从一则帖子中我读到，您可以使用request.body从表单中的输入获取值。因此，我尝试这样做，但是没有用。 当我执行request.body时，它表示未定义；当我尝试执行request.body.fname时，它表示错误，并且该名称不存在。有人知道可能是什么问题吗？人们说这是因为app.use的顺序，但是我尝试更改它，但仍然无法正常工作。请帮忙！
答案 0 :(得分：4)
好像您在任何解析中间件之前 之前都已连接了路由，这可以解释为什么您没有 any 主体（通常，如果正确地连接了它，您会至少得到一个空对象。
app.use('/', router);
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
需要成为
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({ extended: false })); // support encoded bodies
app.use('/', router);