diff --git a/beike/Shop/Http/Controllers/CartController.php b/beike/Shop/Http/Controllers/CartController.php
index b03098fb..0217f994 100644
--- a/beike/Shop/Http/Controllers/CartController.php
+++ b/beike/Shop/Http/Controllers/CartController.php
@@ -4,40 +4,51 @@ namespace Beike\Shop\Http\Controllers;
 
 use Beike\Models\ProductSku;
 use Illuminate\Http\Request;
+use Illuminate\Contracts\View\View;
 use Beike\Shop\Services\CartService;
 
 class CartController extends Controller
 {
-    public function index()
+    /**
+     * @return View
+     */
+    public function index(): View
     {
-        $carts = CartService::list(current_customer());
-        $amount = collect($carts)->sum('subtotal');
-        $data = [
-            'carts' => $carts,
-            'quantity' => collect($carts)->sum('quantity'),
-            'amount' => $amount,
-            'amount_format' => currency_format($amount)
-        ];
+        $data = CartService::reloadData();
         return view("cart", $data);
     }
 
     /**
+     * 选中购物车商品
+     *
      * POST /carts/select {sku_ids:[product_sku_id, product_sku_id]}
      * @param Request $request
+     * @return View
      */
-    public function select(Request $request)
+    public function select(Request $request): View
     {
+        $productSkuIds = $request->get('sku_ids');
+        $customer = current_customer();
+        CartService::select($customer, $productSkuIds);
 
+        $data = CartService::reloadData();
+        return view("cart", $data);
     }
 
-
     /**
      * PUT /carts/{cart_id} {quantity: 123}
      * @param Request $request
+     * @param $cartId
+     * @return View
      */
-    public function update(Request $request)
+    public function update(Request $request, $cartId): View
     {
+        $customer = current_customer();
+        $quantity = $request->get('quantity');
+        CartService::updateQuantity($customer, $cartId, $quantity);
 
+        $data = CartService::reloadData();
+        return view("cart", $data);
     }
 
 
diff --git a/beike/Shop/Services/AccountService.php b/beike/Shop/Services/AccountService.php
index d0c0dfa8..8a81fa41 100644
--- a/beike/Shop/Services/AccountService.php
+++ b/beike/Shop/Services/AccountService.php
@@ -18,10 +18,12 @@ use Illuminate\Support\Facades\Hash;
 class AccountService
 {
     /**
+     * 注册用户
+     *
      * @param array $data // ['email', 'password']
      * @return int
      */
-    public static function register(array $data)
+    public static function register(array $data): int
     {
         $data['password'] = Hash::make($data['password']);
         $data['customer_group_id'] = setting('default_customer_group_id', 1); // default_customer_group_id为默认客户组名称
diff --git a/beike/Shop/Services/CartService.php b/beike/Shop/Services/CartService.php
index 6619257f..24e1b6f8 100644
--- a/beike/Shop/Services/CartService.php
+++ b/beike/Shop/Services/CartService.php
@@ -11,11 +11,18 @@
 
 namespace Beike\Shop\Services;
 
+use Exception;
 use Beike\Models\Cart;
 use Beike\Shop\Http\Resources\CartList;
 
 class CartService
 {
+    /**
+     * 获取购物车商品列表
+     *
+     * @param $customer
+     * @return array
+     */
     public static function list($customer): array
     {
         if (empty($customer)) {
@@ -30,6 +37,10 @@ class CartService
     }
 
 
+    /**
+     * 创建购物车或者更新购物车数量
+     * @throws Exception
+     */
     public static function add($sku, int $quantity, $customer = null)
     {
         $customerId = $customer->id ?? 0;
@@ -37,7 +48,7 @@ class CartService
         $skuId = $sku->id;
 
         if (empty($sku)) {
-            throw new \Exception("无效的SKU ID");
+            throw new Exception("无效的SKU ID");
         }
         $cart = Cart::query()
             ->where('customer_id', $customerId)
@@ -59,4 +70,51 @@ class CartService
         }
         return $cart;
     }
+
+
+    /**
+     * 选择购物车商品
+     *
+     * @param $customer
+     * @param $productSkuIds
+     */
+    public static function select($customer, $productSkuIds)
+    {
+        Cart::query()->where('customer_id', $customer->id)
+            ->whereIn('product_sku_id', $productSkuIds)
+            ->update(['selected', 1]);
+    }
+
+
+    /**
+     * 更新购物车数量
+     */
+    public static function updateQuantity($customer, $cartId, $quantity)
+    {
+        Cart::query()->where('customer_id', $customer->id)
+            ->where('id', $cartId)
+            ->update(['quantity', $quantity]);
+    }
+
+
+    /**
+     * 获取购物车相关数据
+     *
+     * @param array $carts
+     * @return array
+     */
+    public static function reloadData(array $carts = []): array
+    {
+        if (empty($carts)) {
+            $carts = CartService::list(current_customer());
+        }
+        $amount = collect($carts)->sum('subtotal');
+        $data = [
+            'carts' => $carts,
+            'quantity' => collect($carts)->sum('quantity'),
+            'amount' => $amount,
+            'amount_format' => currency_format($amount)
+        ];
+        return $data;
+    }
 }