商品类``

  1. public class Product {
  2.     private String pId;
  3.     private String pName;
  4.     private String pSpecification;
  6.     public Product() {
  8.     }
  9.     public Product(String pId, String pName, String pSpecification) {
  10.         this.pId = pId;
  11.         this.pName = pName;
  12.         this.pSpecification = pSpecification;
  13.     }
  15.     public String getpId() {
  16.         return pId;
  17.     }
  19.     public void setpId(String pId) {
  20.         this.pId = pId;
  21.     }
  23.     public String getpName() {
  24.         return pName;
  25.     }
  27.     public void setpName(String pName) {
  28.         this.pName = pName;
  29.     }
  31.     public String getpSpecification() {
  32.         return pSpecification;
  33.     }
  35.     public void setpSpecification(String pSpecification) {
  36.         this.pSpecification = pSpecification;
  37.     }
  38. }

卖家类

  1. public class Seller {
  2.     private String sName;
  4.     public Seller() {
  6.     }
  7.     public Seller(String sName) {
  8.         this.sName = sName;
  9.     }
  11.     public String getsName() {
  12.         return sName;
  13.     }
  15.     public void setsName(String sName) {
  16.         this.sName = sName;
  17.     }
  18. }

买家类

  1. public class Buyer {
  2.     private String bId;
  3.     private String bName;
  5.     public Buyer() {
  7.     }
  8.     public Buyer(String bId, String bName) {
  9.         this.bId = bId;
  10.         this.bName = bName;
  11.     }
  13.     public String getbId() {
  14.         return bId;
  15.     }
  17.     public void setbId(String bId) {
  18.         this.bId = bId;
  19.     }
  21.     public String getbName() {
  22.         return bName;
  23.     }
  25.     public void setbName(String bName) {
  26.         this.bName = bName;
  27.     }
  28. }

收货者类

  1. public class Receiver {
  2.     private String rName;
  3.     private String rPhone;
  4.     private String rAddress;
  6.     public Receiver() {
  8.     }
  10.     public Receiver(String rName, String rPhone, String rAddress) {
  11.         this.rName = rName;
  12.         this.rPhone = rPhone;
  13.         this.rAddress = rAddress;
  14.     }
  16.     public String getrName() {
  17.         return rName;
  18.     }
  20.     public void setrName(String rName) {
  21.         this.rName = rName;
  22.     }
  24.     public String getrPhone() {
  25.         return rPhone;
  26.     }
  28.     public void setrPhone(String rPhone) {
  29.         this.rPhone = rPhone;
  30.     }
  32.     public String getrAddress() {
  33.         return rAddress;
  34.     }
  36.     public void setrAddress(String rAddress) {
  37.         this.rAddress = rAddress;
  38.     }
  39. }

订单类

  1. import java.time.LocalDate;
  2. import java.time.LocalDateTime;
  3. import java.util.Objects;
  5. public class Order {
  6.     private String oId;
  7.     private LocalDate oTime;
  8.     private String oNotes;
  9.     private Buyer buyer;
  10.     private Product product;
  11.     private Seller seller;
  12.     private Receiver receiver;
  13.     private double payMoney;
  14.     private LocalDateTime payTime;
  16.     public Order() {
  18.     }
  20.     public Order(String oId, LocalDate oTime, String oNotes, Buyer buyer, Product product, Seller seller, Receiver receiver, double payMoney, LocalDateTime payTime) {
  21.         this.oId = oId;
  22.         this.oTime = oTime;
  23.         this.oNotes = oNotes;
  24.         this.buyer = buyer;
  25.         this.product = product;
  26.         this.seller = seller;
  27.         this.receiver = receiver;
  28.         this.payMoney = payMoney;
  29.         this.payTime = payTime;
  30.     }
  32.     public String getoId() {
  33.         return oId;
  34.     }
  36.     public void setoId(String oId) {
  37.         this.oId = oId;
  38.     }
  40.     public LocalDate getoTime() {
  41.         return oTime;
  42.     }
  44.     public void setoTime(LocalDate oTime) {
  45.         this.oTime = oTime;
  46.     }
  48.     public String getoNotes() {
  49.         return oNotes;
  50.     }
  52.     public void setoNotes(String oNotes) {
  53.         this.oNotes = oNotes;
  54.     }
  56.     public Buyer getBuyer() {
  57.         return buyer;
  58.     }
  60.     public void setBuyer(Buyer buyer) {
  61.         this.buyer = buyer;
  62.     }
  64.     public Product getProduct() {
  65.         return product;
  66.     }
  68.     public void setProduct(Product product) {
  69.         this.product = product;
  70.     }
  72.     public Seller getSeller() {
  73.         return seller;
  74.     }
  76.     public void setSeller(Seller seller) {
  77.         this.seller = seller;
  78.     }
  80.     public Receiver getReceiver() {
  81.         return receiver;
  82.     }
  84.     public void setReceiver(Receiver receiver) {
  85.         this.receiver = receiver;
  86.     }
  88.     public double getPayMoney() {
  89.         return payMoney;
  90.     }
  92.     public void setPayMoney(double payMoney) {
  93.         this.payMoney = payMoney;
  94.     }
  96.     public LocalDateTime getPayTime() {
  97.         return payTime;
  98.     }
  100.     public void setPayTime(LocalDateTime payTime) {
  101.         this.payTime = payTime;
  102.     }
  104.     @Override
  105.     public boolean equals(Object o) {
  106.         if (this == o) return true;
  107.         if (o == null || getClass() != o.getClass()) return false;
  109.         Order order = (Order) o;
  111.         if (Double.compare(order.payMoney, payMoney) != 0) return false;
  112.         if (!Objects.equals(oId, order.oId)) return false;
  113.         if (!Objects.equals(oTime, order.oTime)) return false;
  114.         if (!Objects.equals(oNotes, order.oNotes)) return false;
  115.         if (!Objects.equals(buyer, order.buyer)) return false;
  116.         if (!Objects.equals(product, order.product)) return false;
  117.         if (!Objects.equals(seller, order.seller)) return false;
  118.         if (!Objects.equals(receiver, order.receiver)) return false;
  119.         return Objects.equals(payTime, order.payTime);
  120.     }
  122.     @Override
  123.     public int hashCode() {
  124.         int result;
  125.         long temp;
  126.         result = oId != null ? oId.hashCode() : 0;
  127.         result = 31 * result + (oTime != null ? oTime.hashCode() : 0);
  128.         result = 31 * result + (oNotes != null ? oNotes.hashCode() : 0);
  129.         result = 31 * result + (buyer != null ? buyer.hashCode() : 0);
  130.         result = 31 * result + (product != null ? product.hashCode() : 0);
  131.         result = 31 * result + (seller != null ? seller.hashCode() : 0);
  132.         result = 31 * result + (receiver != null ? receiver.hashCode() : 0);
  133.         temp = Double.doubleToLongBits(payMoney);
  134.         result = 31 * result + (int) (temp ^ (temp >>> 32));
  135.         result = 31 * result + (payTime != null ? payTime.hashCode() : 0);
  136.         return result;
  137.     }
  138. }

main函数

  1. import java.io.FileWriter;
  2. import java.io.IOException;
  3. import java.io.Writer;
  4. import java.time.LocalDate;
  5. import java.time.LocalDateTime;
  6. import java.util.ArrayList;
  7. import java.util.HashMap;
  8. import java.util.List;
  9. import java.util.Map;
  12. public class Test {
  13.     public static void main(String[] args) throws IOException {
  14.         List<Order> orderList = order();
  15.         statistic(orderList);
  16.     }
  18.     public static List<Order> order() {
  19.         Buyer buyer1 = new Buyer("liLei96", "李雷");
  20.         Buyer buyer2 = new Buyer("hmm9822", "韩梅梅");
  21.         Buyer buyer3 = new Buyer("mDongMei", "马冬梅");
  23.         Seller seller1 = new Seller("小米旗舰店");
  24.         Seller seller2 = new Seller("苹果旗舰店");
  25.         Seller seller3 = new Seller("李佳奇优选");
  27.         Receiver receiver1 = new Receiver("李有才", "13666666666", "上海市上海市静安区安心家园2号楼1门501");
  28.         Receiver receiver2 = new Receiver("李雷", "13888888888", "北京市朝阳区望京中国尊86层");
  29.         Receiver receiver3 = new Receiver("韩梅梅", "13999999999", "浙江省杭州市西湖区湖中心小岛");
  30.         Receiver receiver4 = new Receiver("马冬梅", "13777777777", "四川省成都市双流机场T2航站楼206-7");
  32.         Product product1 = new Product("SKU01", "小米手机", "8G+128G");
  33.         Product product2 = new Product("SKU02", "苹果电脑", "2021款");
  34.         Product product3 = new Product("SKU03", "MAC口红", "红色");
  36.         Order order1 = new Order("D202101", LocalDate.of(2021, 1, 2), "蓝色", buyer1, product1, seller1, receiver1, 3999, LocalDateTime.of(2021, 1, 2, 12, 8, 28));
  37.         Order order2 = new Order("D202102", LocalDate.of(2021, 1, 2), "银色", buyer1, product2, seller2, receiver2, 13999, LocalDateTime.of(2021, 1, 2, 10, 12, 21));
  38.         Order order3 = new Order("D202103", LocalDate.of(2021, 1, 2), "银色", buyer2, product2, seller2, receiver3, 13999, LocalDateTime.of(2021, 2, 2, 11, 51, 37));
  39.         Order order4 = new Order("D202104", LocalDate.of(2021, 1, 8), null, buyer2, product3, seller3, receiver3, 139.9, LocalDateTime.of(2021, 1, 8, 9, 46, 33));
  40.         Order order5 = new Order("D202105", LocalDate.of(2021, 1, 31), null, buyer3, product3, seller3, receiver4, 139.9, LocalDateTime.of(2021, 2, 1, 1, 22, 6));
  42.         List<Order> list = new ArrayList<>();
  43.         list.add(order1);
  44.         list.add(order2);
  45.         list.add(order3);
  46.         list.add(order4);
  47.         list.add(order5);
  49.         return list;
  50.     }
  51.     public static void statistic(List<Order> orderList) throws IOException {
  52.         try (Writer output = new FileWriter("./file1")) {
  53.             int num = 0;
  54.             double money = 0;
  56.             //将商品编号和名称存进map集合
  57.             Map<String, String> map = new HashMap<>();
  58.             for (Order o : orderList) {
  59.                 if (!map.containsKey(o.getProduct().getpId())) {
  60.                     map.put(o.getProduct().getpId(), o.getProduct().getpName());
  61.                 }
  62.             }
  64.             output.write("月份|商品编号|商品名称|销量|销售额\n");
  66.             for (Map.Entry<String, String> me : map.entrySet()) {
  67.                 for (Order o : orderList) {
  68.                     if (o.getoTime().getMonthValue() == 1) {
  69.                         if (o.getProduct().getpId().equals(me.getKey())) {
  70.                             num++;
  71.                             money += o.getPayMoney();
  72.                         }
  73.                     }
  74.                 }
  75.                 output.write("2021年01月|" + me.getKey() + "|" + me.getValue() + "|" + num + "|" + money + "\n");
  77.                 //统计完一轮，将购买数和消费金额清零，进行下一轮循环
  78.                 num = 0;
  79.                 money = 0;
  80.             }
  81.         }
  83.         try (Writer output = new FileWriter("./file2")) {
  84.             int num = 0;
  85.             double money = 0;
  87.             //将买家id和姓名存储到map集合
  88.             Map<String, String> map = new HashMap<>();
  89.             for (Order o : orderList) {
  90.                 if (!map.containsKey(o.getBuyer().getbId())) {
  91.                     map.put(o.getBuyer().getbId(), o.getBuyer().getbName());
  92.                 }
  93.             }
  95.             output.write("月份|买家ID|买家名称|购买商品数量|消费总额\n");
  97.             //将订单的用户id和map的key值比较，相同则进行统计
  98.             for (Map.Entry<String, String> me : map.entrySet()) {
  99.                 for (Order o : orderList) {
  100.                     if (o.getoTime().getMonthValue() == 1) {
  101.                         if (o.getBuyer().getbId().equals(me.getKey())) {
  102.                             num++;
  103.                             money += o.getPayMoney();
  104.                         }
  105.                     }
  106.                 }
  107.                 output.write("2021年01月|" + me.getKey() + "|" + me.getValue() + "|" + num + "|" + money + "\n");
  109.                 //统计完一轮，将购买数和消费金额清零，进行下一轮循环
  110.                 num = 0;
  111.                 money = 0;
  112.             }
  113.         }
  115.         try (Writer output = new FileWriter("./file3")) {
  116.             double m = 0;
  118.             //将卖家名字存入集合
  119.             List<String> list = new ArrayList<>();
  120.             for (Order o : orderList) {
  121.                 //如果名字不存在则添加进ArrayList集合
  122.                 if (!list.contains(o.getSeller().getsName())) {
  123.                     list.add(o.getSeller().getsName());
  124.                 }
  125.             }
  127.             output.write("月份|卖家名称|营业额\n");
  129.             //将订单中的卖家名字同集合中卖家名字对比，相同则进而统计数据
  130.             for (String s : list) {
  131.                 for (Order o : orderList) {
  132.                     if (o.getoTime().getMonthValue() == 1) {
  133.                         if (o.getSeller().getsName().equals(s)) {
  134.                             m += o.getPayMoney();
  135.                         }
  136.                     }
  137.                 }
  138.                 output.write("2021年01月|" + s + "|" + m + "\n");
  140.                 //每统计完一家店则将金额重新置零，进入下一家店的统计
  141.                 m = 0;
  142.             }
  143.         }
  144.     }
  145. }