go: Enumeration Algorithm

/* # 版权所有 2026 ©涂聚文有限公司™ ® # 许可信息查看言語成了邀功盡責的功臣還需要行爲每日來值班嗎 # 描述Enumeration Algorithm # Author : geovindu,Geovin Du 涂聚文. # IDE : goLang 2024.3.6 go 26.2 # os : windows 10 # database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j # Datetime : 2026/7/15 20:57 # User : geovindu # Product : GoLand # Project : goalgorithms # File : enumeration.go */ package enumeration import ( fmt sort strings ) // Jewelry 珠宝商品结构体 type Jewelry struct { JID string // 商品编号 Category string // 品类项链/戒指/手镯/耳饰 Material string // 材质黄金/铂金/钻石/K金/银饰 Price float64 // 售价 Stock int // 库存 Sales int // 销量 SceneTags []string // 适用场景婚嫁/日常/送礼 } // String 格式化输出和Python __repr__ 保持一致 func (j Jewelry) String() string { scenes : strings.Join(j.SceneTags, ,) return fmt.Sprintf(【%s】%s | %s | 售价%.0f元 | 库存%d件 | 销量%d | 适用场景%s, j.JID, j.Category, j.Material, j.Price, j.Stock, j.Sales, scenes) } // RecommendItem 带评分的候选商品 type RecommendItem struct { Score int Goods Jewelry } // Combo 套装组合项链戒指 type Combo struct { Necklace Jewelry Ring Jewelry Total float64 } // EnumerateFilter 枚举全商品多条件过滤并打分排序 // maxBudget 最高预算, targetMaterial 指定材质, targetCategory 指定品类, targetScene 指定场景 func EnumerateFilter(goodsList []Jewelry, maxBudget float64, targetMaterial, targetCategory, targetScene string) (mainList []Jewelry, upgradeList []Jewelry) { var candidates []RecommendItem // 枚举全部商品枚举算法核心 for _, item : range goodsList { // 约束1无库存直接跳过 if item.Stock 1 { continue } // 约束2超出预算120%直接过滤 if item.Price maxBudget*1.2 { continue } // 约束3材质匹配非空才校验 if targetMaterial ! item.Material ! targetMaterial { continue } // 约束4品类匹配非空才校验 if targetCategory ! item.Category ! targetCategory { continue } // 开始计算推荐得分 score : 0 priceRatio : item.Price / maxBudget // 价格分预算70%-90%最优 if priceRatio 0.7 priceRatio 0.9 { score 50 } else if priceRatio 1.0 { score 30 } else { score 10 // 小幅超预算升级款 } // 场景匹配加分 if targetScene ! { for _, s : range item.SceneTags { if s targetScene { score 30 break } } } // 销量加分上限20分 saleScore : item.Sales / 10 if saleScore 20 { saleScore 20 } score saleScore candidates append(candidates, RecommendItem{ Score: score, Goods: item, }) } // 按分数降序排序 sort.Slice(candidates, func(i, j int) bool { return candidates[i].Score candidates[j].Score }) // 拆分主推款预算内、升级款小幅超预算 for _, c : range candidates { if c.Goods.Price maxBudget { mainList append(mainList, c.Goods) } else { upgradeList append(upgradeList, c.Goods) } } return mainList, upgradeList } // EnumerateCombo 枚举项链戒指成套组合总价不超预算 func EnumerateCombo(goodsList []Jewelry, totalBudget float64) []Combo { var combos []Combo // 筛选项链、戒指 var necklaces []Jewelry var rings []Jewelry for _, g : range goodsList { if g.Stock 1 { continue } if g.Category 项链 { necklaces append(necklaces, g) } if g.Category 戒指 { rings append(rings, g) } } // 双层枚举所有搭配组合 for _, n : range necklaces { for _, r : range rings { sum : n.Price r.Price if sum totalBudget { combos append(combos, Combo{ Necklace: n, Ring: r, Total: sum, }) } } } return combos } // InitStoreData 初始化门店珠宝库存数据 func InitStoreData() []Jewelry { return []Jewelry{ { JID: N001, Category: 项链, Material: 黄金, Price: 5280, Stock: 12, Sales: 120, SceneTags: []string{婚嫁, 送礼}, }, { JID: N002, Category: 项链, Material: 铂金, Price: 7600, Stock: 3, Sales: 60, SceneTags: []string{求婚, 日常}, }, { JID: N003, Category: 项链, Material: 钻石, Price: 12800, Stock: 5, Sales: 45, SceneTags: []string{纪念日}, }, { JID: N004, Category: 项链, Material: K金, Price: 3680, Stock: 8, Sales: 150, SceneTags: []string{日常}, }, { JID: R001, Category: 戒指, Material: 黄金, Price: 2150, Stock: 15, Sales: 200, SceneTags: []string{日常, 婚嫁}, }, { JID: R002, Category: 戒指, Material: 钻石, Price: 9999, Stock: 2, Sales: 88, SceneTags: []string{求婚}, }, { JID: R003, Category: 戒指, Material: 银饰, Price: 599, Stock: 30, Sales: 320, SceneTags: []string{日常}, }, { JID: B001, Category: 手镯, Material: 黄金, Price: 8600, Stock: 4, Sales: 80, SceneTags: []string{婚嫁, 送礼}, }, { JID: B002, Category: 手镯, Material: 银饰, Price: 1280, Stock: 22, Sales: 260, SceneTags: []string{日常}, }, { JID: E001, Category: 耳饰, Material: K金, Price: 1680, Stock: 18, Sales: 190, SceneTags: []string{日常, 纪念日}, }, { JID: E002, Category: 耳饰, Material: 铂金, Price: 4200, Stock: 6, Sales: 72, SceneTags: []string{求婚}, }, { JID: E003, Category: 耳饰, Material: 钻石, Price: 6500, Stock: 0, // 无库存过滤 Sales: 30, SceneTags: []string{纪念日}, }, } } /* # 版权所有 2026 ©涂聚文有限公司™ ® # 许可信息查看言語成了邀功盡責的功臣還需要行爲每日來值班嗎 # 描述Enumeration Algorithm # Author : geovindu,Geovin Du 涂聚文. # IDE : goLang 2024.3.6 go 26.2 # os : windows 10 # database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j # Datetime : 2026/7/15 20:58 # User : geovindu # Product : GoLand # Project : goalgorithms # File : enumerationbll.go */ package bll import ( fmt goalgorithms/enumeration strings ) func EnumerationMain() { allJewelry : enumeration.InitStoreData() // 1. 打印全店所有商品 fmt.Println( 珠宝门店全部商品枚举全集 ) for _, item : range allJewelry { fmt.Println(item) } fmt.Println(strings.Repeat(-, 90)) // 场景1预算6000不限材质、不限品类、不限场景 fmt.Println(\n【顾客需求1】预算≤6000元任意品类任意材质有库存) main1, up1 : enumeration.EnumerateFilter(allJewelry, 6000, , , ) if len(main1) 0 { fmt.Println(无符合条件首饰) } else { for _, g : range main1 { fmt.Println(g) } } // 场景2预算10000材质黄金品类手镯场景婚嫁 fmt.Println(\n【顾客需求2】预算≤10000元仅黄金手镯婚嫁场景) main2, up2 : enumeration.EnumerateFilter(allJewelry, 10000, 黄金, 手镯, 婚嫁) if len(main2) 0 { fmt.Println(无符合条件首饰) } else { for _, g : range main2 { fmt.Println(g) } } if len(up2) 0 { fmt.Println(\n [升级备选款]) for _, g : range up2 { fmt.Println(g) } } // 场景3预算5000铂金、耳饰、求婚场景 fmt.Println(\n【顾客需求3】预算≤5000元铂金耳饰求婚场景) main3, up3 : enumeration.EnumerateFilter(allJewelry, 5000, 铂金, 耳饰, 求婚) if len(main3) 0 { fmt.Println(无符合条件首饰) } else { for _, g : range main3 { fmt.Println(g) } } if len(up3) 0 { fmt.Println(\n [升级备选款]) for _, g : range up3 { fmt.Println(g) } } // 场景4预算8000钻石戒指求婚场景无匹配 fmt.Println(\n【顾客需求4】预算≤8000元钻石戒指求婚场景) main4, up4 : enumeration.EnumerateFilter(allJewelry, 8000, 钻石, 戒指, 求婚) if len(main4) 0 { fmt.Println(无符合条件首饰) } else { for _, g : range main4 { fmt.Println(g) } } if len(up4) 0 { fmt.Println(\n [升级备选款]) for _, g : range up4 { fmt.Println(g) } } if len(main4) 0 len(up4) 0 { fmt.Println(无匹配首饰) } // 打印小幅超预算升级款示例 fmt.Println(\n【升级备选款示例预算6000】) for _, g : range up1 { fmt.Println(g) } // 枚举配套组合项链戒指总价≤10000 fmt.Println(\n 项链戒指组合套装总价≤10000元 ) comboList : enumeration.EnumerateCombo(allJewelry, 10000) if len(comboList) 0 { fmt.Println(无可用套装) } else { for _, c : range comboList { fmt.Printf(套装组合\n %s\n %s\n 合计总价%.0f元\n, c.Necklace, c.Ring, c.Total) fmt.Println(----------------------------------------) } } }代码实现了一个珠宝商品推荐系统主要包含两个核心功能单品推荐算法根据预算、材质、品类和场景等多条件筛选珠宝商品并基于价格匹配度、销量和场景适用性进行智能评分排序输出预算内主推款和超预算升级款。套装组合算法枚举所有项链戒指的组合筛选总价不超过预算的可行搭配方案。系统还包含完整的珠宝商品数据结构含ID、品类、材质、价格等属性和初始化数据方法支持格式化输出商品信息。通过条件过滤和智能推荐算法帮助用户快速找到符合需求的珠宝商品或套装组合。输出