diff --git a/maku-server/src/main/java/net/maku/maku/controller/TShoppingTrolleyController.java b/maku-server/src/main/java/net/maku/maku/controller/TShoppingTrolleyController.java
index 65f0753..d5534a7 100644
--- a/maku-server/src/main/java/net/maku/maku/controller/TShoppingTrolleyController.java
+++ b/maku-server/src/main/java/net/maku/maku/controller/TShoppingTrolleyController.java
@@ -112,8 +112,14 @@ public class TShoppingTrolleyController {
     }
     @PostMapping("/add")
     @Operation(summary = "添加购物车")
-    public Result<String> add(@RequestBody TShoppingTrolleyEntity entity){
-        tShoppingTrolleyService.add(entity);
+    public Result<String> add(HttpServletRequest request, @RequestParam Integer bookId){
+        String token = request.getHeader("token");
+        TUserEntity user = (TUserEntity) redisCache.get(token);
+        if(ObjectUtils.isNull(user)){
+            throw new ServerException(ErrorCode.REFRESH_TOKEN_INVALID);
+        }
+        Integer userId=user.getId();
+        tShoppingTrolleyService.add(userId,bookId);
         return Result.ok("加入购物车成功");
     }
 }
\ No newline at end of file
diff --git a/maku-server/src/main/java/net/maku/maku/service/TShoppingTrolleyService.java b/maku-server/src/main/java/net/maku/maku/service/TShoppingTrolleyService.java
index 012b86c..1c4f6d0 100644
--- a/maku-server/src/main/java/net/maku/maku/service/TShoppingTrolleyService.java
+++ b/maku-server/src/main/java/net/maku/maku/service/TShoppingTrolleyService.java
@@ -28,5 +28,5 @@ public interface TShoppingTrolleyService extends BaseService<TShoppingTrolleyEnt
     void save(Integer userId, Integer bookId, Date date);
 
 
-    TShoppingTrolleyEntity add(TShoppingTrolleyEntity entity);
+    TShoppingTrolleyEntity add(Integer userId, Integer bookId);
 }
\ No newline at end of file
diff --git a/maku-server/src/main/java/net/maku/maku/service/impl/TShoppingTrolleyServiceImpl.java b/maku-server/src/main/java/net/maku/maku/service/impl/TShoppingTrolleyServiceImpl.java
index 48d085e..a19b37c 100644
--- a/maku-server/src/main/java/net/maku/maku/service/impl/TShoppingTrolleyServiceImpl.java
+++ b/maku-server/src/main/java/net/maku/maku/service/impl/TShoppingTrolleyServiceImpl.java
@@ -79,28 +79,34 @@ public class TShoppingTrolleyServiceImpl extends BaseServiceImpl<TShoppingTrolle
     }
 
     @Override
-    public TShoppingTrolleyEntity add(TShoppingTrolleyEntity entity) {
+    public TShoppingTrolleyEntity add(Integer userId, Integer bookId) {
         LambdaQueryWrapper<TShoppingTrolleyEntity> queryWrapper = new LambdaQueryWrapper<>();
-        queryWrapper.eq(TShoppingTrolleyEntity::getUserId, entity.getUserId());
+        queryWrapper.eq(TShoppingTrolleyEntity::getUserId, userId);
+        queryWrapper.eq(TShoppingTrolleyEntity::getBookId, bookId);
         TShoppingTrolleyEntity existingEntity = baseMapper.selectOne(queryWrapper);
+
         if (existingEntity != null) {
+            // 如果购物车中已存在该记录，则增加数量
             Integer number = existingEntity.getNumber();
-            if (number != null) {
-                existingEntity.setNumber(number + 1);
-            } else {
-                existingEntity.setNumber(1);
-            }
+            //为空+1，不为空为1
+            existingEntity.setNumber(number != null ? number + 1 : 1);
             baseMapper.updateById(existingEntity);
-            return existingEntity;
         } else {
+            // 如果购物车中不存在该记录，则创建新记录
             TShoppingTrolleyEntity newEntity = new TShoppingTrolleyEntity();
-            newEntity.setUserId(entity.getUserId());
-            newEntity.setNumber(1);
+            newEntity.setUserId(userId);
+            newEntity.setBookId(bookId);
+            newEntity.setNumber(1); // 初始数量为1
+
             baseMapper.insert(newEntity);
-            return newEntity;
+            existingEntity = newEntity; // 返回新创建的实体
         }
+
+        return existingEntity;
     }
-    }
+}
+
+