企业官网建设流程全解析

打折网站模板,dw网页模板素材,认证网站所有权要添加代码,晋城建设网站一、实现思路 模板方法#xff1a;固定推荐流程 策略模式#xff1a;听阈规则 / 价格规则可替换 二、整体设计结构 AbstractProductRecommendTemplate↓filterByThreshold() ← 策略①↓groupByBrand()↓selectByPriceLevel() ← 策略②↓buildResult()三、第一步固定推荐流程策略模式听阈规则 / 价格规则可替换二、整体设计结构AbstractProductRecommendTemplate ↓ filterByThreshold() ← 策略① ↓ groupByBrand() ↓ selectByPriceLevel() ← 策略② ↓ buildResult()三、第一步定义“推荐模板”流程写死public abstract class AbstractProductRecommendTemplate { public final ListProduct recommend(ListProduct products, UserProfile user) { // 1、 听阈过滤最关键 ListProduct available filterByThreshold(products, user); if (available.isEmpty()) { return Collections.emptyList(); } // 2、 按品牌分组 MapString, ListProduct brandMap groupByBrand(available); // 3、 每个品牌选高 / 中 / 低 3种价格的产品对应不同价格需求的用户群体 return selectByPriceLevel(brandMap, user); } protected abstract ListProduct filterByThreshold( ListProduct products, UserProfile user); protected MapString, ListProduct groupByBrand(ListProduct products) { return products.stream() .collect(Collectors.groupingBy(Product::getBrand)); } protected abstract ListProduct selectByPriceLevel( MapString, ListProduct brandMap, UserProfile user); }四、第二步听阈匹配策略1、 策略接口public interface ThresholdMatchStrategy { boolean match(Product product, UserProfile user); }2、实现类Component(DEFAULT_THRESHOLD) public class DefaultThresholdStrategy implements ThresholdMatchStrategy { Override public boolean match(Product p, UserProfile user) { return p.getMinHz() user.getMinHz() p.getMaxHz() user.getMaxHz(); } }五、第三步价格选择策略1、 策略接口public interface PriceSelectStrategy { ListProduct select(ListProduct products); }2、 高 / 中 / 低 价格策略Component(HIGH_MID_LOW) public class HighMidLowPriceStrategy implements PriceSelectStrategy { Override public ListProduct select(ListProduct products) { if (products.size() 3) { return products; } products.sort(Comparator.comparing(Product::getPrice)); Product low products.get(0); Product mid products.get(products.size() / 2); Product high products.get(products.size() - 1); return List.of(low, mid, high); } }六、模板的实现类组合使用上面的2个策略Autowired private ThresholdMatchStrategy thresholdStrategy; Autowired private PriceSelectStrategy priceSelectStrategy; Override protected ListProduct filterByThreshold(ListProduct products, UserProfile user) { return products.stream() .filter(p - thresholdStrategy.match(p, user)) .collect(Collectors.toList()); } Override protected ListProduct selectByPriceLevel( MapString, ListProduct brandMap, UserProfile user) { ListProduct result new ArrayList(); brandMap.forEach((brand, list) - { result.addAll(priceSelectStrategy.select(list)); }); return result; }七、Controller / Service 使用方式Autowired private ProductRecommendService recommendService; public ListProduct recommend(Long userId) { UserProfile user userService.getProfile(userId); ListProduct products productRepository.findAll(); return recommendService.recommend(products, user); }这套设计特别适用于以下场景听力产品推荐活动商品推荐套餐组合分档定价