1.修改app.js文件，将其中的user路由去掉。

2.在index路由中配置如下：

 

router.all('*', function(req, res, next) {    res.header("Access-Control-Allow-Origin", "*");    res.header("Access-Control-Allow-Headers", "X-Requested-With");    res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");    res.header("X-Powered-By",' 3.2.1');    res.header("Content-Type", "application/json;charset=utf-8");    next();});//设置允许跨域访问    Var obj = [{name:”zhangsna”,age:11,address:”Shanxi”,time:”2018-10-10"}] router.get(“/”,(requires,next) => {        Let id = req.query.id;        if(id==400) {            res.send({status:0,data:obj})        }    })

 

 

访问：

以上是express下的ejs模版引擎而言

下面是单个的api页面

 

var express=require('express');var app =express();//设置跨域访问app.all('*', function(req, res, next) {   res.header("Access-Control-Allow-Origin", "*");   res.header("Access-Control-Allow-Headers", "X-Requested-With");   res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");   res.header("X-Powered-By",' 3.2.1');   res.header("Content-Type", "application/json;charset=utf-8");   next();});var questions=[{    data:213,    num:444,    age:12},{    data:456,    num:678,    age:13}];//写个接口123app.get('/123',function(req,res){    res.status(200),    res.json(questions)});//配置服务端口var server = app.listen(3000, function () {    var host = server.address().address;    var port = server.address().port;    console.log('Example app listening at http://%s:%s', host, port);