Java를 사용하여 창고 관리 시스템의 판매 예측 및 재고 보충 계획 기능 개발

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;
    }
}