5.2 购物车 - 未登录已登录加入购物车业务代码讲解

在 foodie-dev-pojo 模块中的 com.imooc.pojo.bo 包内创建 ShopcartBO 类

package com.imooc.pojo.bo;
/**
 * Created by 92578 on 2020/8/16 13:57
 **/
public class ShopcartBO {
    private String itemId;
    private String itemImgUrl;
    private String itemName;
    private String specId;
    private String specName;
    private Integer buyCounts;
    private String priceDiscount;
    private String priceNormal;
    public String getItemId() {
        return itemId;
    }
    public void setItemId(String itemId) {
        this.itemId = itemId;
    }
    public String getItemImgUrl() {
        return itemImgUrl;
    }
    public void setItemImgUrl(String itemImgUrl) {
        this.itemImgUrl = itemImgUrl;
    }
    public String getItemName() {
        return itemName;
    }
    public void setItemName(String itemName) {
        this.itemName = itemName;
    }
    public String getSpecId() {
        return specId;
    }
    public void setSpecId(String specId) {
        this.specId = specId;
    }
    public String getSpecName() {
        return specName;
    }
    public void setSpecName(String specName) {
        this.specName = specName;
    }
    public Integer getBuyCounts() {
        return buyCounts;
    }
    public void setBuyCounts(Integer buyCounts) {
        this.buyCounts = buyCounts;
    }
    public String getPriceDiscount() {
        return priceDiscount;
    }
    public void setPriceDiscount(String priceDiscount) {
        this.priceDiscount = priceDiscount;
    }
    public String getPriceNormal() {
        return priceNormal;
    }
    public void setPriceNormal(String priceNormal) {
        this.priceNormal = priceNormal;
    }
    @Override
    public String toString() {
        return "ShopcartBO{" +
                "itemId='" + itemId + '\'' +
                ", itemImgUrl='" + itemImgUrl + '\'' +
                ", itemName='" + itemName + '\'' +
                ", specId='" + specId + '\'' +
                ", specName='" + specName + '\'' +
                ", buyCounts=" + buyCounts +
                ", priceDiscount='" + priceDiscount + '\'' +
                ", priceNormal='" + priceNormal + '\'' +
                '}';
    }
}

在 foodie-dev-api 模块中的 com.imooc.controller 包内创建 ShopcartController 类

package com.imooc.controller;

import com.imooc.pojo.bo.ShopcartBO;
import com.imooc.utils.IMOOCJSONResult;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author 92578
 * @since 1.0
 */
@Api(value = "购物车接口 controller", tags = {"购物车接口相关的 api"})
@RequestMapping("shopcart")
@RestController
public class ShopcartController {

    @ApiOperation(value = "添加商品到购物车", notes = "添加商品到购物车", httpMethod = "POST")
    @PostMapping("/add")
    public IMOOCJSONResult add(@RequestParam String userId,
                               @RequestBody ShopcartBO shopcartBO,
                               HttpServletRequest request,
                               HttpServletResponse response) {
        if (StringUtils.isBlank(userId)) {
            return IMOOCJSONResult.errorMsg("");
        }

        System.out.println(shopcartBO);

        // TODO 前端用户在登录的情况下，添加商品到购物车，会同时在后端同步购物车到 redis 缓存

        return IMOOCJSONResult.ok();
    }
}

启动项目，打开浏览器，访问 http://localhost:8080/foodie-shop/
登录账户“imooc”，密码“123123”
访问 http://localhost:8080/foodie-shop/item.html?itemId=cake-1006
挑选一些商品，将商品添加到购物车

打开浏览器的调试工具，查看 cookie，出现了 shopcart

查看 idea 控制台，发现添加的商品信息已经打印出来