Question

我尝试使用express将代码拆分为两个。这就是我做的事情

app.js

var express = require('express');
var app = express();
var stud = require('./grades');

var port = process.env.PORT || 3000;

stud.excellence;

app.listen(port);

grades.js

var text = '{ "students" : [' +
'{ "name":"Elsa" , "grade":"70" , "course":"ws" , "year":"2015" },' +
'{ "name":"Anna" , "grade":"80" , "course":"ws" , "year":"2016" },' +
'{ "name":"Anna" , "grade":"86" , "course":"math" , "year":"2014" },' +
'{ "name":"Ron" , "grade":"92" , "course":"math" , "year":"2016" } ]}';


module.exports = function excellence() {
    app.get('/getAllExcellenceStudent', function(req, res) {
        res.json(text);

    })

};

当我试图在我的loclhost中编写http://localhost:3000/getAllExcellenceStudent时，我得到了无法获取/ getAllExcellenceStudent

我做错了什么？

Answer 1

Your app.js should be like this. Actually you are missing app.use() to define routes

var express = require('express');
var app = express();
var stud = require('./grades');

var port = process.env.PORT || 3000;

app.use('/students', stud);

app.listen(port);

Your grades.js file should be like this.

var express = require('express');
var router = express.Router();

var text = '{ "students" : [' +
    '{ "name":"Elsa" , "grade":"70" , "course":"ws" , "year":"2015" },' +
    '{ "name":"Anna" , "grade":"80" , "course":"ws" , "year":"2016" },' +
    '{ "name":"Anna" , "grade":"86" , "course":"math" , "year":"2014" },' +
    '{ "name":"Ron" , "grade":"92" , "course":"math" , "year":"2016" } ]}';



        router.get('/getAllExcellenceStudent', function(req, res) {
            res.json(text);

        });
module.exports = router;

Now you can access it using this route http://localhost:3000/students/getAllExcellenceStudent

Answer 2

您的代码中有几处错误。

1 - stud.excellence;和module.exports = function excellence() {在这种情况下，您应该将其用作var stud = require('./grades')(); 或

var stud = require('./grades'); 
var excellence = new stud();

2 - 它不起作用，cos grade.js不知道变量app。因此，作为解决方案，您可以将其作为参数传递：

    module.exports = function excellence(app) {
        app.get('/getAllExcellenceStudent', function(req, res) {
            res.json(text);

        })

    };

//index.js

var stud = require('./grades')(app);

你可以，但这是完全错误的做法。 @bilalmetla先生给出正确的答案，你应该使用express.Router。

将快速节点js拆分为两个

2 个答案: