1. 程式人生 > >8、生鮮電商平臺-購物車模組的設計與架構

8、生鮮電商平臺-購物車模組的設計與架構

說明:任何一個電商無論是B2C還是B2B都有一個購物車模組,其中最重要的原因就是客戶需要的東西放在一起,形成一個購物清單,確認是否有問題,然後再進行下單與付款.

 

1. 購物車資料庫設計:

 

 

說明:業務需求:

         1》購物車裡面應該存放,那個買家,買了那個菜品的什麼規格,有多少數量,然後這個菜品的加工方式如何。(如果存在加工方式的話,就會在這裡顯示處理。)

          2》買家存在購物起送價。也就是使用者放入購物車的商品的總價格如果低於配置的起送價,那麼這個提交按鈕就是灰色的。(不可能你點一個洋蔥我們就送過去,成本太高。)

         

           系統設計:

       1. 購物車在買家APP上進行,這個時候是不需要跟後端API互動的,因為體驗很差勁,使用者在APP頁面中不停的點選加菜以及菜的數量,如果根據後端進行互動,哪怕是每次請求是100ms,頁面會存在很嚴重的抖動行為,速度快的話會出現卡頓,這個是不行的。

                         2.    在使用者確定完成後,確認下單的時候,提交購物車,讓後端可以儲存使用者購物車的資料。(確認下單過程)

                         3.    在使用者去付款的時候,也就是提交了訂單。這個時候再清理購物車。

 

相關後端程式碼如下:

                  

複製程式碼
/**
 * 購物車
 */
@RestController
@RequestMapping("/buyer/goodsCart")
public class GoodsCartController extends BaseController{
    
private static final Logger logger = LoggerFactory.getLogger(GoodsCartController.class);
    
    @Autowired
    private GoodsCartService goodsCartService;
    
    @Autowired
    private GoodsFormatService goodsFormatService;

    
    /**
     * 生成購物車;
     * 1:先刪除歷史購物車;
     * 2:新增購物車資料;
     */
    @RequestMapping(value="/commitCart",method={RequestMethod.GET,RequestMethod.POST})
    public JsonResult commitCar(HttpServletRequest request, HttpServletResponse response,@RequestBody GoodsListVo goodsListVo) 
    {
        try
        {
            List<GoodsCart> list = goodsListVo.getList();
            
            if(null == goodsListVo.getUserId() || null == list){
                
                return new JsonResult(JsonResultCode.FAILURE, "請求引數異常", "");
            }
            
            for (int i = 0; i < list.size(); i++) {
                
                if(null ==list.get(i).getBuyerId()  || null == list.get(i).getFormatId()){
                    
                    return new JsonResult(JsonResultCode.FAILURE, "請求引數異常", "");
                }
            }
            
            int result = goodsCartService.commitCart(list,goodsListVo.getUserId());
            
            //更新購物車為空    則直接返回;
            if(list.size()<1){
                
                return new JsonResult(JsonResultCode.SUCCESS, "更新成功", new ArrayList<>());
            }
            
            Long buyerId = list.get(0).getBuyerId();
            
            List<GoodsCartVo> goodsCartBuyers = goodsCartService.getGoodsCartBuyerId(buyerId);
            
            if (result == list.size()) 
            {
                return new JsonResult(JsonResultCode.SUCCESS, "新增成功", goodsCartBuyers);
            } 
                return new JsonResult(JsonResultCode.SUCCESS, "有下架商品", goodsCartBuyers);
                
        }catch(Exception e){
            
            logger.error("[GoodsCartController][commitCart]",e);
            
            return new JsonResult(JsonResultCode.FAILURE, "系統錯誤,請稍後重試","");
        }
    }
    
    /**
     * 對單個數據進行修改 新增 刪除;
     * @param request
     * @param response
     * @param goodsCart
     * @return
     */
    @RequestMapping(value="/updateCart",method={RequestMethod.GET,RequestMethod.POST})
    public JsonResult updateCart(HttpServletRequest request, HttpServletResponse response,@RequestBody GoodsCart goodsCart) 
    {
        try
        {
            
            BigDecimal goodsNumber=goodsCart.getGoodsNumber();
            
            Long formartId=goodsCart.getFormatId();
            
            BigDecimal count = goodsFormatService.getGoodsFormatById(formartId).getFormatPrice().multiply(goodsNumber);
            
            goodsCart.setCreateTime(new Date());
            
            int result = goodsCartService.updateGoodsCart(goodsCart);
            
            if (result > 0) 
            {
                return new JsonResult(JsonResultCode.SUCCESS, "操作成功", count);
            }
                return new JsonResult(JsonResultCode.FAILURE, "操作失敗", count);
        }catch(Exception e){
            
            logger.error("[GoodsCartController][updateCart]",e);
            
            return new JsonResult(JsonResultCode.FAILURE, "系統錯誤,請稍後重試","");
        }
    }
    
    
    /**
     * 
     * @param request
     * @param response
     * @param goodsCart
     * @return
     */
    @RequestMapping(value="/insertCart",method={RequestMethod.GET,RequestMethod.POST})
    public JsonResult insertCart(HttpServletRequest request, HttpServletResponse response,@RequestBody GoodsCart goodsCart) 
    {
        try
        {
            BigDecimal goodsNumber=goodsCart.getGoodsNumber();
            
            Long formartId=goodsCart.getFormatId();
            
            BigDecimal count = goodsFormatService.getGoodsFormatById(formartId).getFormatPrice().multiply(goodsNumber);
            
            goodsCart.setCreateTime(new Date());
            
            int result = goodsCartService.insertGoodsCart(goodsCart);
            
            if (result > 0) 
            {
                return new JsonResult(JsonResultCode.SUCCESS, "操作成功", count);
            } 
                return new JsonResult(JsonResultCode.FAILURE, "操作失敗", count);
        }catch(Exception e){
            
            logger.error("[GoodsCartController][insertCart]",e);
            
            return new JsonResult(JsonResultCode.FAILURE, "系統錯誤,請稍後重試","");
        }
    }
    
    
    /**
     * 根據cartId 刪除單個購物車項;
     * @param request
     * @param response
     * @param cartId
     * @return
     */
    @RequestMapping(value="/deleteCart",method={RequestMethod.GET,RequestMethod.POST})
    public JsonResult deleteCar(HttpServletRequest request, HttpServletResponse response, Long cartId) 
    {
        
        try
        {
            if(null == cartId){
                
                return new JsonResult(JsonResultCode.FAILURE, "請求引數異常", "");
            }
            
            int result = goodsCartService.deleteGoodsCart(cartId);
            
            if (result > 0) 
            {
                return new JsonResult(JsonResultCode.SUCCESS, "刪除成功", "");
            } else 
            {
                return new JsonResult(JsonResultCode.FAILURE, "資料已不存在", "");
                
            }
        }catch(Exception e){
            
            logger.error("[GoodsCartController][deleteCart]",e);
            
            return new JsonResult(JsonResultCode.FAILURE, "系統錯誤,請稍後重試","");
        }
    }
    
    @RequestMapping(value="/showCart",method={RequestMethod.GET,RequestMethod.POST})
    public JsonResult showCart(HttpServletRequest request, HttpServletResponse response,@RequestBody GoodsListVo goodsListVo) {
        try
        {
            List<GoodsCart> list = goodsListVo.getList();
            Long buyerId = goodsListVo.getUserId();
            Long sellerId = goodsListVo.getSellerId();
                if(null == buyerId ||null == sellerId){
                
                return new JsonResult(JsonResultCode.FAILURE, "請求引數異常", "");
                }
                goodsCartService.commitCartByBuyerIdSellerId(list,buyerId, sellerId);
                
            List<ProductVo> productVos = goodsCartService.getGoodsCartListBySellerId(buyerId, sellerId);
            
            return new JsonResult(JsonResultCode.SUCCESS, "查詢成功", productVos);
        }catch(Exception e){
            logger.error("[GoodsCartController][showCart]",e);
            
            return new JsonResult(JsonResultCode.FAILURE, "系統錯誤,請稍後重試","");
        }
        }
}
複製程式碼

基本業務功能:

1.購物車可以清空。

2. 購物車可以提交。

3. 購物車可以更新。

4. 購物車也可以查詢。

 

補充說明:那麼APP端提交給後端的API的物件應該是怎麼樣的呢?

 

以下貼出程式碼與講解:

 

複製程式碼
public class GoodsCart implements Serializable{
    
    private static final long serialVersionUID = 7078019879911908296L;

    /**
     * 
     */
    private Long cartId;
    /**
     * 買家ID
     */
    private Long buyerId;

    /**
     * 商品規格id
     */
    private Long formatId;

    /**
     * 所屬賣家ID
     */
    private Long sellerId;
    
    /**
     * 店鋪名稱
     */
    private String sellerName;


    /**
     * 商品數量
     */
    private BigDecimal goodsNumber;


    /**
     * 加工方式ID
     */
    private Long methodId;
    
    /**
     * 是否選擇 (1是 -1否)
     */
    private Integer isSelected;

    /**
     * 建立時間
     */
    private Date createTime;
    
    /**
     * 查詢建立時間
     */
    private String queryTime;

    /**
     * 買家 
     */
    private Buyer buyer;
    
    /**
     * 賣家
     */
    private Seller seller;
    
    /**
     *sku
     */
    private GoodsFormat goodsFormat;
    
    /**
     * 加工方式
     */
    private ProcessMethod processMethod;
    
    public String getSellerName() {
        return sellerName;
    }

    public void setSellerName(String sellerName) {
        this.sellerName = sellerName;
    }

    public Long getCartId() {
        return cartId;
    }

    public void setCartId(Long cartId) {
        this.cartId = cartId;
    }

    public Long getBuyerId() {
        return buyerId;
    }

    public void setBuyerId(Long buyerId) {
        this.buyerId = buyerId;
    }

    public Long getFormatId() {
        return formatId;
    }

    public void setFormatId(Long formatId) {
        this.formatId = formatId;
    }

    public Long getSellerId() {
        return sellerId;
    }

    public void setSellerId(Long sellerId) {
        this.sellerId = sellerId;
    }

    public BigDecimal getGoodsNumber() {
        return goodsNumber;
    }

    public void setGoodsNumber(BigDecimal goodsNumber) {
        this.goodsNumber = goodsNumber;
    }

    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public Buyer getBuyer() {
        return buyer;
    }

    public void setBuyer(Buyer buyer) {
        this.buyer = buyer;
    }

    public Seller getSeller() {
        return seller;
    }

    public void setSeller(Seller seller) {
        this.seller = seller;
    }

    public GoodsFormat getGoodsFormat() {
        return goodsFormat;
    }

    public void setGoodsFormat(GoodsFormat goodsFormat) {
        this.goodsFormat = goodsFormat;
    }

    public String getQueryTime() {
        return queryTime;
    }

    public void setQueryTime(String queryTime) {
        this.queryTime = queryTime;
    }

    public Long getMethodId() {
        return methodId;
    }

    public void setMethodId(Long methodId) {
        this.methodId = methodId;
    }

    public Integer getIsSelected() {
        return isSelected;
    }

    public void setIsSelected(Integer isSelected) {
        this.isSelected = isSelected;
    }

    public ProcessMethod getProcessMethod() {
        return processMethod;
    }

    public void setProcessMethod(ProcessMethod processMethod) {
        this.processMethod = processMethod;
    }

    
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講解:

            1.這個菜品的規格,以及所屬賣家,買家,包括是否需要加工等等。(比如買家買了魚,這個魚到底是需要怎麼樣處理呢?活魚,肚殺,背殺),特別說明:這個跟實際的業

務有關,如果不是做生鮮這塊的話,可能很難體會。

            2. 買家肯定會買多個菜品,而不是一個,所以需要有一個List<GoodsCart> list;

 

相關實際程式碼如下:

     

複製程式碼
public class GoodsListVo implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = -2024011567608945523L;

    private List<GoodsCart> list;
    
    private Long userId;
    
    private Long sellerId;

    public List<GoodsCart> getList() {
        return list;
    }

    public void setList(List<GoodsCart> list) {
        this.list = list;
    }

    public Long getUserId() {
        return userId;
    }

    public void setUserId(Long userId) {
        this.userId = userId;
    }

    public Long getSellerId() {
        return sellerId;
    }

    public void setSellerId(Long sellerId) {
        this.sellerId = sellerId;
    }
    
}
複製程式碼

Java開源生鮮電商平臺-購物車模組的設計與架構(原始碼可下載),如果需要下載的話,可以在我的github下面進行下載。 

 

相關的運營截圖如下:

 

 

          

 

 

 

 

 

      

 

 

 

 

 

轉載自-- https://www.cnblogs.com/jurendage/p/9039195.html