BS1069-基于javaSpringboot的协同过滤推荐算法的商品推荐系统

@GetMapping({"/index", "/", "/index.html"})
    public String indexPage(HttpServletRequest request, HttpSession httpSession) {
        List<NewBeeMallIndexCategoryVO> categories = newBeeMallCategoryService.getCategoriesForIndex();
        if (CollectionUtils.isEmpty(categories)) {
            NewBeeMallException.fail("分类数据不完善");
        }
        List<NewBeeMallIndexCarouselVO> carousels = newBeeMallCarouselService.getCarouselsForIndex(Constants.INDEX_CAROUSEL_NUMBER);
        List<NewBeeMallIndexConfigGoodsVO> hotGoodses = newBeeMallIndexConfigService.getConfigGoodsesForIndex(IndexConfigTypeEnum.INDEX_GOODS_HOT.getType(), Constants.INDEX_GOODS_HOT_NUMBER);
        List<NewBeeMallIndexConfigGoodsVO> newGoodses = newBeeMallIndexConfigService.getConfigGoodsesForIndex(IndexConfigTypeEnum.INDEX_GOODS_NEW.getType(), Constants.INDEX_GOODS_NEW_NUMBER);
        List<NewBeeMallIndexConfigGoodsVO> recommendGoodses = newBeeMallIndexConfigService.getConfigGoodsesForIndex(IndexConfigTypeEnum.INDEX_GOODS_RECOMMOND.getType(), Constants.INDEX_GOODS_RECOMMOND_NUMBER);
        if (!CollectionUtils.isEmpty(recommendGoodses)) {
            NewBeeMallUserVO user = (NewBeeMallUserVO) httpSession.getAttribute(Constants.MALL_USER_SESSION_KEY);
            if (null != user) {
                List<Map<String, Object>> maps = jdbcTemplate.queryForList("SELECT k.goods_name `name`,m.goods_category_id fenlei,count(1) `value` from tb_newbee_mall_order t \n" +
                        "LEFT JOIN tb_newbee_mall_user p ON t.user_id=p.user_id \n" +
                        "LEFT JOIN tb_newbee_mall_order_item k ON t.order_id=k.order_id\n" +
                        "LEFT JOIN tb_newbee_mall_goods_info m ON m.goods_id = k.goods_id\n" +
                        "WHERE t.user_id=? AND !ISNULL(k.goods_name) GROUP BY k.goods_name ORDER BY `value` DESC LIMIT 1", user.getUserId());
                if (!CollectionUtils.isEmpty(maps)) {
                    List<Map<String, Object>> records = jdbcTemplate.queryForList("SELECT p.nick_name `type`,GROUP_CONCAT(k.goods_name, '|') `name`, GROUP_CONCAT(DISTINCT k.goods_category_id) fenlei FROM tb_newbee_mall_order t \n" +
                            "LEFT JOIN tb_newbee_mall_user p ON t.user_id=p.user_id\n" +
                            "LEFT JOIN tb_newbee_mall_order_item l ON t.order_id=l.order_id\n" +
                            "LEFT JOIN tb_newbee_mall_goods_info k ON k.goods_id = l.goods_id GROUP BY p.nick_name");
                    List<TuijianPair<String, List<String>>> userInfos = new ArrayList<>();
                    if (!CollectionUtils.isEmpty(records)) {
                        for (Map<String, Object> record : records) {
                            String cname = String.valueOf(record.get("name"));
                            List<String> goods = Arrays.asList(cname.split("\\|"));
                            userInfos.add(new TuijianPair<>(String.valueOf(record.get("type")), goods));
                        }
                    }
                    List<TuijianPair<String, Double>> gPairs = TuijianCollFilter.xietongguolvMovietuijian(userInfos, user.getNickName());
                    System.out.println(gPairs);
                    if (!CollectionUtils.isEmpty(gPairs)) {
                        List<TuijianPair<String, Double>> collect = gPairs.stream().filter(m -> m.getValue() > 0).collect(Collectors.toList());
                        collect.sort(new Comparator<TuijianPair<String, Double>>() {
                            @Override
                            public int compare(TuijianPair<String, Double> o1, TuijianPair<String, Double> o2) {
                                return (int) (o1.getValue() - o2.getValue());
                            }
                        });
                        Map<String, Object> params = new HashMap<>();
                        params.put("limit", 10);
                        params.put("page", 1);
                        String key = collect.get(0).getKey();
                        params.put("keyword", key.startsWith(",") ? key.substring(1) : key);
                        Map<String, Object> cmap = maps.get(0);
                        params.put("goodsCategoryId", cmap.get("fenlei"));
                        PageQueryUtil pageUtil = new PageQueryUtil(params);
                        PageResult pageResult = newBeeMallGoodsService.tuijianSearchMallGoodsList(pageUtil);
                        List<NewBeeMallSearchGoodsVO> list1 = (List<NewBeeMallSearchGoodsVO>) pageResult.getList();
                        List<NewBeeMallIndexConfigGoodsVO> rmgoods = new ArrayList<>();
                        if (!CollectionUtils.isEmpty(list1)) {
                            for (int i = 0; i < list1.size(); i++) {
                                NewBeeMallIndexConfigGoodsVO v = new NewBeeMallIndexConfigGoodsVO();
                                NewBeeMallSearchGoodsVO goodsVO = list1.get(i);
                                v.setGoodsId(goodsVO.getGoodsId());
                                v.setGoodsIntro(goodsVO.getGoodsIntro());
                                v.setGoodsCoverImg(goodsVO.getGoodsCoverImg());
                                v.setGoodsName(goodsVO.getGoodsName());
                                v.setSellingPrice(goodsVO.getSellingPrice());
                                rmgoods.add(v);
                            }
                        }
                        if (!CollectionUtils.isEmpty(rmgoods)) {
                            if (rmgoods.size() >= 10) {
                                recommendGoodses = rmgoods;
                            } else {
                                List<NewBeeMallIndexConfigGoodsVO> hbgoods = recommendGoodses.subList(0, 10 - rmgoods.size());
                                rmgoods.addAll(hbgoods);
                                recommendGoodses = rmgoods;
                            }

                        }
                    }
                }
            } else {
                Collections.shuffle(recommendGoodses);
            }
        }
        request.setAttribute("categories", categories);//分类数据
        request.setAttribute("carousels", carousels);//轮播图
        request.setAttribute("hotGoodses", hotGoodses);//热销商品
        request.setAttribute("newGoodses", newGoodses);//新品
        request.setAttribute("recommendGoodses", recommendGoodses);//推荐商品
        return "mall/index";
    }