路由模块化

1、创建路由：

在router文件下创建下列文件

login.js

const express = require("express");
const router = express.Router();
router.get("/",function (req,res) {
    res.send("登录页面")
});
router.get("doLogin",function (req,res) {
});
module.exports = router;

products.js

const express = require("express");
const router = express.Router();
router.get("/",function (req,res) {
    res.send("商品首页")
});
router.get("/add",function (req,res) {
    res.send("商品首页")
});
router.get("/delete",function (req,res) {
    res.send("商品首页")
});
module.exports = router;

创建admin.js(或index.js)

将前面创建的路由放到一个公共路由文件中

const express = require("express");
const router = express.Router();
//相当于后台的路由，所有的后台处理都需要从这里经过
const login = require("admin/login");
const product = require("admin/product");
router.use("/login",login);
router.use("/product",product);
module.exports = router;

2、在app.js 中引入

const express = require("express");
const app = new express();
//引入route模块
const admin  = require("./route/admin");
//加载admin模块
app.use("/admin",admin);
app.listen("3001","127.0.0.1");