把服务的DemoService引入到controller来，get路由对应findAll，post对应create，暂时保存在临时对象

src/posts/posts.controller.ts

@@ -1,17 +1,20 @@
 import { Controller, Get, Post, Req, Query, Headers, Param, Body } from '@nestjs/common';
 import { CreatePostDto } from './post.dto';
+import { DemoService } from './providers/demo/demo.service'
+
 
 @Controller('posts')
 export class PostsController {
+    private readonly demoService;
+
+    constructor(demoService: DemoService) {
+        this.demoService = demoService
+    }
+
+
     @Get()
-    index(@Headers('authorization') headers, @Query() query) {
-        console.log(headers)
-        console.log(query)
-        return [
-            {
-                title: 'hello ~'
-            }
-        ]
+    index() {
+        return this.demoService.findAll();
     }
 
     @Get(':id')
@@ -23,7 +26,6 @@ export class PostsController {
 
     @Post()
     store(@Body() post: CreatePostDto) {
-        console.log(post)
-        return post
+        this.demoService.create(post);
     }
 }