~~~ const koa = require('koa'); const router = require('koa-router')(); const app = new koa(); router.get('/',async ctx=>{ ctx.body="hello world" }).get('/detail/:id',async ctx=>{ //动态获取前台的传参 console.log(ctx.params) ctx.body = "detail" }) app.use(router.routes()).use(router.allowedMethods()); app.listen(8080) ~~~