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                [TOC] # 編寫API接口 ## 控制器 > 創建Book控制器`app/controller/Book.php` 輸入控制器的內容,通過Db類的靜態方法檢索數據庫表book中的全部記錄并以json格式輸出。 > 我們編寫前后端分離的接口程序都以json格式返回數據結果。 ~~~ <?php namespace app\controller; use app\BaseController; use think\facade\Db; class Book extends BaseController { public function getBookList() { // 獲取數據集 $books = Db::name('book')->select(); $response = [ 'errno' => 0, 'errmsg' => '', 'data' => $books ]; return json($response); } public function getBookInfo($id=0) { $book = Db::name('book')->where(['id'=>$id])->find(); if ($book){ $response = [ 'errno' => 0, 'errmsg' => '', 'data' => $book ]; }else{ $response = [ 'errno' => 1000, 'errmsg' => '沒有滿足條件的數據', 'data' => null ]; } return json($response); } } ~~~ 代碼說明: 門面為容器中的(動態)類提供了一個靜態調用接口,相比于傳統的靜態方法調用, 帶來了更好的可測試性和擴展性,你可以為任何的非靜態類庫定義一個`facade`類。 ## 使用RESTer工具測試接口 在FireFox瀏覽器中安裝RESTer擴展插件,啟動插件輸入 ~~~ http://localhost:8000/index.php?s=book/getBookInfo/id/1 ~~~ ![](https://img.kancloud.cn/25/a0/25a0839a7e6494ea02b9398d1e800fde_818x565.png) 如圖所示,我們看到檢索到的數據以JSON對象的形式返回。 ~~~ { "errno": 0, "errmsg": "", "data": { "id": 1, "title": "ThinkPHP 5框架原理與實戰 ", "author": "黑馬程序員", "publisher": "中國鐵道出版社", "pub_year": 2019, "isbn": "9787113259716", "price": "55.00" } } ~~~
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