Express 编写后端数据接口

// Student List data/students.json
[
    {
        "id": 1,
        "name": "小红",
        "grade": 1
    },
    {
        "id": 2,
        "name": "小明",
        "grade": 2
    },
    {
        "id": 3,
        "name": "小李",
        "grade": 3
    }
]
// Teacher List data/teachers.json
[
    {
        "id": 1,
        "name": "小野",
        "subject": "语文",
        "like": 0
    },
    {
        "id": 2,
        "name": "小夏",
        "subject": "数学",
        "like": 0
    },
    {
        "id": 3,
        "name": "哈默",
        "subject": "英语",
        "like": 0
    }
]

const express = require('express');
const { readFileSync } = require('fs');
const { resolve } = require('path');
const app = express();
app.all('*', function (req, res, next){
    res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Methods', 'POST,GET');
  next();
});
app.get('/getTeachers', function(req, res){
  const teacherData = JSON.parse(readFileSync(resolve(__dirname, './data/teachers.json'), 'utf8'));
    res.send(teacherData);
});
app.get('/getStudents', function(req, res){
   const studentData = JSON.parse(readFileSync(resolve(__dirname, './data/students.json'), 'utf8'));
    res.send(studentData);
})
app.listen(8080, function(){
    console.log('Welcome to use Express!!!');
})