Next.js 15 App Router深度实践：从CSR到RSC的迁移
Next.js 15 App Router Deep Dive: Migrating from CSR to RSC
| iDev Tech | 2026-08-04T10:00:00
详细讲解Next.js 15 App Router的核心概念和从Pages Router迁移的实战经验。
Detailed guide to Next.js 15 App Router core concepts and practical migration experience from Pages Router.
App Router核心概念App Router基于React Server Components，默认所有组件都是服务端组件。需要客户端交互的组件必须显式添加"use client"指令。文件路由约定：layout.tsx（布局）、page.tsx（页面）、loading.tsx（加载状态）、error.tsx（错误边界）、not-found.tsx（404页面）。数据获取模式服务端组件直接使用async/await获取数据（无需getServerSideProps）；客户端组件使用SWR或React Query。Parallel Routes和Intercepting Routes是App Router独有的高级路由模式，适合模态框和复杂布局。迁移策略推荐渐进式迁移：app/目录和pages/目录可以共存。优先迁移不依赖客户端状态的页面（如文章详情、产品列表）。最后迁移强依赖客户端交互的页面（如表单、仪表板）。
App Router Core ConceptsApp Router is built on React Server Components, where all components are server components by default. Components needing client interactivity must explicitly add the "use client" directive. File routing conventions: layout.tsx (layout), page.tsx (page), loading.tsx (loading state), error.tsx (error boundary), not-found.tsx (404).Data Fetching PatternsServer components fetch data directly with async/await (no getServerSideProps needed); client components use SWR or React Query. Parallel Routes and Intercepting Routes are advanced routing patterns unique to App Router, ideal for modals and complex layouts.Migration StrategyRecommend incremental migration: app/ and pages/ directories can coexist. Prioritize pages without client state dependencies (article details, product listings). Migrate client-heavy pages last (forms, dashboards).