Koa框架路由

安装路由

npm install koa
npm install dotenv
npm install koa-router

代码案例

const Koa = require("koa");
const app = new Koa();

const Router = require("koa-router");
const router = new Router();

let host = 'localhost';
let port = 3000;

app.use(async (ctx, next) => {
  console.log("request url->", ctx.request.url);
  await next();
});

//get路由
router.get('/', async (ctx, next) => {
  ctx.response.body = "首页";
});

router.get('/main', async (ctx, next) => {
  ctx.response.body = "主页";
});


//路由和koa框架关联
app.use(router.routes());

//监听
app.listen(port, host, () => {
  console.log(`http://${host}:${port}`);
});

路由拆分成各个模块

工程结构

.env

APP_PORT=3000

src\config\config.default.js

const dotenv = require('dotenv');
const config = dotenv.config({path:'.env'});

module.exports = process.env;

src\main.js

const Koa = require("koa");
const app = new Koa();
const {APP_PORT} = require('./config/config.default');
const indexRouter = require("./router/index.router");
const userRouter = require("./router/user.router");
const roleRouter = require("./router/role.router");

app.use(indexRouter.routes());
app.use(userRouter.routes());
app.use(roleRouter.routes());

app.listen(APP_PORT,()=>{
  console.log("listen:" ,APP_PORT);
});

src\router\index.router.js

const Router = require("koa-router");
const router = new Router();

router.get('/',(ctx,next)=>{
  ctx.body="/";
});

module.exports=router;

src\router\role.router.js

const Router = require('koa-router');
const router = new Router({ prefix: '/role' });

router.get('/', (ctx, next) => {
  ctx.body = "role";
});

module.exports = router;

src\router\user.router.js

const Router = require('koa-router');
const router = new Router({ prefix: '/user' });

router.get('/', (ctx, next) => {
  ctx.body = "user index";
});

module.exports = router;

路由拆分成各个模块2

工程结构

src\main.js

const app = require('./app/index');
const {APP_PORT} = require('./config/config.default');

app.listen(APP_PORT,()=>{
  console.log("port",APP_PORT);
});

src\app\index.js

const Koa = require('koa');
const app = new Koa();

const indexRouter = require("../router/index.router");
const userRouter = require("../router/user.router");
const roleRouter = require("../router/role.router");

app.use(indexRouter.routes());
app.use(userRouter.routes());
app.use(roleRouter.routes());

module.exports = app;

路由和控制器拆分

工程结构

路由

src\router\index.router.js

const Router = require("koa-router");
const router = new Router();
const { index, main } = require('../controller/index.controller');

router.get('/', index);
router.get('/main', main);

module.exports = router;

src\router\role.router.js

const Router = require('koa-router');
const router = new Router({ prefix: '/role' });
const { get, list } = require('../controller/role.controller');

router.get('/get', get);
router.get('/list', list);

module.exports = router;

src\router\user.router.js

const Router = require('koa-router');
const router = new Router({ prefix: '/user' });
const { page, add } = require('../controller/user.controller');

router.get('/page', page);
router.get('/add', add);

module.exports = router;

控制器

src\controller\index.controller.js

class IndexController {
  async index(ctx, next) {
    ctx.body = '/index';
  }
  async main(ctx, next) {
    ctx.body = '/main';
  }
}

let indexController = new IndexController();

module.exports = indexController;

src\controller\role.controller.js

class RoleController {
  async get(ctx, next) {
    ctx.body = "role get";
  }
  async list(ctx, next) {
    ctx.body = "role list";
  }
}

module.exports = new RoleController();

src\controller\user.controller.js

class UserController {
  async page(ctx, next) {
    ctx.body = "user page";
  }
  async add(ctx, next) {
    ctx.body = 'user add';
  }
}

module.exports = new UserController();