使用Java开发仓库管理系统的库存分类和ABC分析功能

public class Inventory {
    private String itemName;
    private String category;

    public Inventory(String itemName, String category) {
        this.itemName = itemName;
        this.category = category;
    }

    public String getItemName() {
        return itemName;
    }

    public String getCategory() {
        return category;
    }
}

public class Classification {
    public static void main(String[] args) {
        List<Inventory> inventoryList = new ArrayList<>();
        inventoryList.add(new Inventory("物品A", "分类A"));
        inventoryList.add(new Inventory("物品B", "分类B"));
        inventoryList.add(new Inventory("物品C", "分类A"));

        Map<String, List<Inventory>> classificationMap = new HashMap<>();
        for (Inventory inventory : inventoryList) {
            String category = inventory.getCategory();
            if (classificationMap.containsKey(category)) {
                classificationMap.get(category).add(inventory);
            } else {
                List<Inventory> newList = new ArrayList<>();
                newList.add(inventory);
                classificationMap.put(category, newList);
            }
        }

        // 输出分类结果
        for (String category : classificationMap.keySet()) {
            System.out.println("分类：" + category);
            List<Inventory> itemList = classificationMap.get(category);
            for (Inventory inventory : itemList) {
                System.out.println(inventory.getItemName());
            }
            System.out.println();
        }
    }
}

public class Inventory {
    private String itemName;
    private double sales;

    public Inventory(String itemName, double sales) {
        this.itemName = itemName;
        this.sales = sales;
    }

    public String getItemName() {
        return itemName;
    }

    public double getSales() {
        return sales;
    }
}

public class ABCAnalysis {
    public static void main(String[] args) {
        List<Inventory> inventoryList = new ArrayList<>();
        inventoryList.add(new Inventory("物品A", 1000));
        inventoryList.add(new Inventory("物品B", 2000));
        inventoryList.add(new Inventory("物品C", 500));

        // 按照销售额排序
        inventoryList.sort(Comparator.comparingDouble(Inventory::getSales).reversed());

        // 计算总销售额
        double totalSales = 0;
        for (Inventory inventory : inventoryList) {
            totalSales += inventory.getSales();
        }

        // 计算ABC类别
        double cumulativeSales = 0;
        for (Inventory inventory : inventoryList) {
            cumulativeSales += inventory.getSales();
            double ratio = cumulativeSales / totalSales;
            if (ratio <= 0.8) {
                System.out.println(inventory.getItemName() + " - A类");
            } else if (ratio <= 0.95) {
                System.out.println(inventory.getItemName() + " - B类");
            } else {
                System.out.println(inventory.getItemName() + " - C类");
            }
        }
    }
}