Javaを使用して倉庫管理システムの売上予測や在庫補充計画機能を開発

public class SalesData {
    private Date date;
    private String product;
    private int quantity;

    // 省略构造方法、getter和setter
}

public class SalesForecast {
    private List<SalesData> salesDataList;

    // 省略构造方法和其他属性

    // 根据商品分类统计销售量
    public Map<String, List<SalesData>> groupSalesData() {
        Map<String, List<SalesData>> salesDataMap = new HashMap<>();
        for (SalesData data : salesDataList) {
            if (!salesDataMap.containsKey(data.getProduct())) {
                salesDataMap.put(data.getProduct(), new ArrayList<>());
            }
            salesDataMap.get(data.getProduct()).add(data);
        }
        return salesDataMap;
    }

    // 使用简单的方法预测销售量
    public Map<String, Integer> forecastSales() {
        Map<String, Integer> forecastMap = new HashMap<>();
        Map<String, List<SalesData>> salesDataMap = groupSalesData();
    
        for (Map.Entry<String, List<SalesData>> entry : salesDataMap.entrySet()) {
            List<SalesData> dataList = entry.getValue();
            int sum = 0;
            for (SalesData data : dataList) {
                sum += data.getQuantity();
            }
            int avg = sum / dataList.size();
            forecastMap.put(entry.getKey(), avg);
        }
    
        return forecastMap;
    }
}

public class Inventory {
    private String product;
    private int quantity;
    private int replenishPeriod;

    // 省略构造方法、getter和setter
}

public class StockReplenishment {
    private Map<String, Integer> salesForecast;
    private Map<String, Inventory> inventoryMap;

    // 省略构造方法和其他属性

    // 制定补货计划
    public Map<String, Integer> createReplenishmentPlan() {
        Map<String, Integer> replenishmentPlan = new HashMap<>();
        for (Map.Entry<String, Integer> entry : salesForecast.entrySet()) {
            String product = entry.getKey();
            int forecastQuantity = entry.getValue();
            if (inventoryMap.containsKey(product)) {
                Inventory inventory = inventoryMap.get(product);
                if (forecastQuantity > inventory.getQuantity()) {
                    int replenishQuantity = forecastQuantity - inventory.getQuantity();
                    replenishmentPlan.put(product, replenishQuantity);
                }
            }
        }
        return replenishmentPlan;
    }
}