const express=require("express");
const path=require("path");
const logger=require("morgan");
const app=express(); //创建Web应用
// app.get("/",(req,res,next)=>{
// res.send("Hello Express!");
// next();
// })
挂载静态资源
app.use("/",express.static(path.join(__dirname,"/public")));
//挂载日子组件
app.use(logger("dev"));
//设置视图文件的路径
app.set('views', path.join(__dirname, 'public'));
//设置视图引擎为ejs
app.set('view engine', 'ejs');
//挂载路由
const indexRouter=require("./router/index")
app.use("/",indexRouter);
const dogRouter=require("./router/dog")
app.use("/dog",dogRouter);
//获取query中的参数
app.get("/cart",(req,res,next)=>{
let id=req.query.id;
res.send("Get,id="+id);
})
//获取路径中的值
app.get("/cart/:id/:type",(req,res,next)=>{
let id=req.params.id;
res.send(req.url+",id="+id+"type="+req.params.type);
})
//挂载中间件函数
//如果不指明路径则匹配根路径
app.use("/",(req,res,next)=>{
console.log("当前时间："+Date.now());
next();
})
module.exports=app;//导出对象
www.js
const app=require("../app.js");
app.listen(3000,"127.0.0.1",()=>{
console.log("Web应用运行中...");
})
./router/dog.js（设置路由）
const express=require("express");
//创建路由对象
const router=express.Router();
const _=require("lodash");
let dogs=[
{id:1,name:"金毛",price:1000},
{id:2,name:"阿拉斯加",price:1000},
{id:3,name:"比熊",price:1000},
{id:4,name:"泰迪",price:1000},
{id:5,name:"旺财",price:1000}
]
router.get('/', function(req, res, next) {
res.render('dog', { title: 'dog',dogs,msg:""});
});
router.get('/delete/:id', function(req, res, next) {
//拿到索引
let index=_.findIndex(dogs,{id:parseInt(req.params.id)});
//删除
dogs.splice(index,1);
//返回消息提示
res.render("dog",{ title: 'dog',dogs,msg:"删除成功"})
});
module.exports=router;
Original: https://www.cnblogs.com/zsbb/p/16706541.html
Author: 最帅爸爸
Title: Node.js（二）express
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