形容
应用 express.Router 类来创立可装置的模块化路由处理程序。Router 实例是残缺的中间件和路由零碎；因而，经常将其称为“微型应用程序”。以下示例将路由器创立为模块，在其中装入中间件，定义一些路由，而后装置在主应用程序的门路中。在应用程序目录中创立名为 user.js 的路由器文件，其中蕴含以下内容：我的项目目录
我的项目中应用
app.js
const express = require('express');const path = require('path');const logger = require('morgan');const cookieParser = require('cookie-parser');const bodyParser = require('body-parser');const cookieSession = require('cookie-session');const apiRoutes = require('./routes/api');const cors = require('cors');const app = express();// view engine setupapp.set('views', path.join(__dirname, 'views'));app.set('view engine', 'ejs');// uncomment after placing your favicon in /publicapp.use(logger('dev'));app.use(bodyParser.json());app.use(bodyParser.urlencoded({ extended: false }));app.use(cookieParser());app.use( cookieSession({ name: 'session', secret: 'sdfasd@d34sdf@', maxAge: 24 * 60 * 60 * 1000 * 7, }));app.use(cors());app.use(express.static(path.join(__dirname, 'public')));// 相当于拼接门路app.use('/api', apiRoutes);// catch 404 and forward to error handlerapp.use(function (req, res, next) { const err = new Error('Not Found'); err.status = 404; next(err);});app.all('*', function (req, res, next) { // 相当于域名白名单, 不能写 * ,因为*是通配符 所有网站都能够拜访 本人为了玩 用着 也行 // 不是本公司网站也能拜访 ,那就扯了 // res.setHeader('Access-Control-Allow-Origin', '*'); // 所以能够独自配置白名单,也就是能进行跨域拜访的网址 res.setHeader('Access-Control-Allow-Origin', ['http://127.0.0.1:8000']); //...Headers必须的固定值,"content-type" res.setHeader('Access-Control-Allow-Headers', 'X-request-With,content-type'); // res.setHeader("Access-Control-Allow-Headers","X-request-With"); res.setHeader('Access-Control-Allow-Methods', 'GET,POST,DELETE,PUT,OPTIONS'); // 放行/下一步 不能省 next();});// error handlerapp.use(function (err, req, res, next) { // set locals, only providing error in development res.locals.message = err.message; res.locals.error = req.app.get('env') === 'development' ? err : {}; // render the error page res.status(err.status || 500); res.render('error');});module.exports = app;routes/api.js
const express = require('express');const router = express.Router();const userController = require('../controllers/user.js');const testController = require('../controllers/test.js');/* 增加用户列表 */router.post('/user', userController.add);router.post('/test', testController.add);module.exports = router;controllers/user.js
const express = require('express');const router = express.Router();// middleware that is specific to this routerrouter.use(function timeLog(req, res, next) { console.log('Time: ', Date.now()); next();});// define the about routerouter.post('/user', function(req, res) { res.send('用户列表api');});// define the home page routerouter.post('/test', function(req, res) { res.send('测试api');});module.exports = router;models/user.js
const mongoose = require('../utils/database.js');const User = mongoose.model('user', { age: Number, email: String,});module.exports = { add(age, email, cb) { const user = new User({ age: age, email: email, }); user.save((err) => cb(err)); },};utils/database.js
const mongoose = require('mongoose');// mongoose.connect('mongodb://数据库门路（包含端口）/数据库名字');mongoose.connect('mongodb://127.0.0.1:27017/xveZhi');mongoose.Promise = global.Promise;module.exports = mongoose;