public R detail(@PathVariable("id") Long id) { Commodity detail = commodityService.getById(id);//查询商品详情 CommodityVO commodityVO = CommodityWrapper.build().entityVO(detail); //将detail赋值给entityVO,返回一个commodityVO对象 //查询满足条件的商品 List<CommodityAttribute> items = commodityAttributeService.list(Wrappers.<CommodityAttribute>lambdaQuery() .eq(CommodityAttribute::getCommodityId, id).eq(CommodityAttribute::getSpec, false)); //将ParentId赋值给attributeIds List<Long> attributeIds = items.stream().map(item -> item.getParentId()).collect(Collectors.toList()); commodityVO.setAttributeId(attributeIds); commodityVO.setAttribute(items); commodityVO.setCommoditySpec(commodityService.commoditySpec(id));//属性IDcommoditySpec return R.ok(commodityVO); }
时间: 2023-06-26 16:10:31 浏览: 57
这段代码是一个基于Spring框架的Java后端接口,用于获取商品详情。接口通过传入商品ID,查询商品详情,并将详情封装为一个CommodityVO对象返回。在查询商品详情之后,接口还会根据商品ID查询满足特定条件的商品属性,并将这些属性封装到CommodityVO对象中返回。最后,接口还会调用commodityService.commoditySpec方法,获取属性ID为commoditySpec的商品规格,并将其设置到CommodityVO对象中。
相关问题
帮我改写以下代码,不要用servlet.代码为:@Controller public class CartController { @Autowired private UserService userService; @Autowired private CommodityService commodityService; @Autowired private CartService cartService; @GetMapping("/cart") public String cart(Model model, HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return "redirect:/login"; } List<Cart> cartList = cartService.findByUid(user.getUid()); model.addAttribute("cartList", cartList); return "cart"; } @PostMapping("/cart/add") public String addCart(Integer cid, Integer cnum, HttpServletRequest request) { HttpSession session = request.getSession(); User user = (User)session.getAttribute("user"); if (user == null) { return "redirect:/login"; } Commodity commodity = commodityService.findById(cid); if (commodity == null) { return "redirect:/commodity"; } Cart cart = new Cart(); cart.setUid(user.getUid()); cart.setCid(cid); cart.setCnum(cnum); cartService.save(cart); return "redirect:/cart"; } @PostMapping("/cart/delete") public String deleteCart(Integer cartid) { cartService.deleteById(cartid); return "redirect:/cart"; }
以下是改写后的代码,使用了Spring Boot的@RestController注解和@ResponseBody注解来实现API风格的接口:
@RestController
public class CartController {
@Autowired
private UserService userService;
@Autowired
private CommodityService commodityService;
@Autowired
private CartService cartService;
@GetMapping("/cart")
public List<Cart> getCart(HttpServletRequest request) {
HttpSession session = request.getSession();
User user = (User)session.getAttribute("user");
if (user == null) {
return null;
}
List<Cart> cartList = cartService.findByUid(user.getUid());
return cartList;
}
@PostMapping("/cart/add")
public String addCart(Integer cid, Integer cnum, HttpServletRequest request) {
HttpSession session = request.getSession();
User user = (User)session.getAttribute("user");
if (user == null) {
return "redirect:/login";
}
Commodity commodity = commodityService.findById(cid);
if (commodity == null) {
return "redirect:/commodity";
}
Cart cart = new Cart();
cart.setUid(user.getUid());
cart.setCid(cid);
cart.setCnum(cnum);
cartService.save(cart);
return "success";
}
@PostMapping("/cart/delete")
public String deleteCart(Integer cartid) {
cartService.deleteById(cartid);
return "success";
}
}
这里将原来的@Controller注解改为@RestController注解,表示这是一个API控制器,不需要返回视图,而是直接返回数据。同时,将原来的Model和视图名称改为了List<Cart>,表示返回一个购物车列表。为了让返回的数据能够被前端页面接收到,我们使用@ResponseBody注解将返回值转为JSON格式。最后,将原来的重定向操作改为返回字符串"success",表示操作成功。
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.example.flower.mapper.OrderMapper"> <!-- 通用查询映射结果 --> <resultMap id="OrderMap" type="com.example.flower.pojo.Order"> <id column="id" property="id" /> <result column="create_user_id" property="createUserId" /> <result column="status" property="status" /> <result column="payment" property="payment" /> <result column="pay_time" property="payTime" /> <result column="address" property="address" /> <collection property="commodityList" ofType="com.example.flower.pojo.Commodity"> <result column="name" property="name" /> </collection> </resultMap> <!-- 通用查询结果列 --> <sql id="Base_Column_List"> id, status, payment, pay_time, address, create_user_id, commodity_id </sql> <insert id="insertOrder"> insert into `order`(id, status, payment, pay_time, address, create_user_id, commodity_id) value (#{id},#{status},#{payment},#{payTime},#{address},#{createUserId},#{commodityId}) </insert> <select id="listAll" resultType="order"> select `order`.*, commodity.name from `order`, commodity where `order`.commodity_id = commodity.id; </select> </mapper>
这是 MyBatis 的 Mapper XML 配置文件示例,其中定义了一个名为 OrderMapper 的命名空间。该文件包含了一个 resultMap 标签,用于将查询结果映射为 Order 对象。其中,使用了 collection 标签来表示 Order 对象中包含了一个 Commodity 对象集合。另外,也定义了一个 id 为 Base_Column_List 的 sql 标签,用于存放通用查询结果列。最后,该文件还包含了两个 sql 语句,一个 insert 语句用于插入 Order 对象,一个 select 语句用于查询所有 Order 对象,并且将其中的 commodityList 集合属性也一并查询出来。