商品信息管理系统的实现，如下

Question

商品信息管理系统的实现，如图
商品信息管理系统的实现，如图
商品信息管理系统的实现，如图

Answer 1

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为了实现这个商品信息管理系统，我们将按照所给的要求逐步创建类和方法。首先，我们从Goods类开始，接着是CultureStore类，最后编写测试用例确保所有的功能都能正常工作。

步骤1：创建 Goods 类

import java.util.Date;

public class Goods {
    private String goodsCode;
    private String productName;
    private String supplier;
    private double sellingPrice;
    private long stockQuantity;

    public Goods(String goodsCode, String productName, String supplier, double sellingPrice, long stockQuantity) {
        this.goodsCode = goodsCode;
        this.productName = productName;
        this.supplier = supplier;
        this.sellingPrice = sellingPrice;
        this.stockQuantity = stockQuantity;
    }

    // Getters and Setters
    public String getGoodsCode() { return goodsCode; }
    public void setGoodsCode(String goodsCode) { this.goodsCode = goodsCode; }
    public String getProductName() { return productName; }
    public void setProductName(String productName) { this.productName = productName; }
    public String getSupplier() { return supplier; }
    public void setSupplier(String supplier) { this.supplier = supplier; }
    public double getSellingPrice() { return sellingPrice; }
    public void setSellingPrice(double sellingPrice) { this.sellingPrice = sellingPrice; }
    public long getStockQuantity() { return stockQuantity; }
    public void setStockQuantity(long stockQuantity) { this.stockQuantity = stockQuantity; }

    // Print method
    public void print() {
        System.out.println(" Goods Code: " + goodsCode);
        System.out.println(" Product Name: " + productName);
        System.out.println(" Supplier: " + supplier);
        System.out.println(" Selling Price: " + sellingPrice);
        System.out.println(" Stock Quantity: " + stockQuantity);
    }
}

步骤2：创建 CultureStore 类

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

public class CultureStore {
    private List<Goods> goodsList;

    public CultureStore() {
        this.goodsList = new ArrayList<>();
    }

    // AddGood method
    public void addGood(Goods goods) {
        goodsList.add(goods);
    }

    // DelGood method
    public boolean delGood(String goodsCode) {
        for (int i = 0; i < goodsList.size(); i++) {
            if (goodsList.get(i).getGoodsCode().equals(goodsCode)) {
                goodsList.remove(i);
                return true;
            }
        }
        return false;
    }

    // UpdGood method
    public boolean updGood(String oldGoodsCode, Goods newGoods) {
        for (int i = 0; i < goodsList.size(); i++) {
            if (goodsList.get(i).getGoodsCode().equals(oldGoodsCode)) {
                goodsList.set(i, newGoods);
                return true;
            }
        }
        return false;
    }

    // QueryGood method
    public Goods queryGood(String goodsCode) {
        for (Goods goods : goodsList) {
            if (goods.getGoodsCode().equals(goodsCode)) {
                return goods;
            }
        }
        return null;
    }

    // SaleGood method
    public double saleGood(String goodsCode, int quantity) {
        Goods goods = queryGood(goodsCode);
        if (goods != null && quantity > 0 && quantity <= goods.getStockQuantity()) {
            goods.setStockQuantity(goods.getStockQuantity() - quantity);
            return goods.getSellingPrice() * quantity;
        } else {
            System.out.println("Invalid quantity or out of stock");
            return 0;
        }
    }

    // StatGood method
    public long totalQuantity() {
        long sum = 0;
        for (Goods goods : goodsList) {
            sum += goods.getStockQuantity();
        }
        return sum;
    }

    public double totalValue() {
        double sum = 0;
        for (Goods goods : goodsList) {
            sum += goods.getSellingPrice() * goods.getStockQuantity();
        }
        return sum;
    }

    public long countByCodes(List<String> codes) {
        long count = 0;
        for (String code : codes) {
            for (Goods goods : goodsList) {
                if (goods.getGoodsCode().equals(code)) {
                    count++;
                }
            }
        }
        return count;
    }

    public double valueByCodes(List<String> codes) {
        double sum = 0;
        for (String code : codes) {
            for (Goods goods : goodsList) {
                if (goods.getGoodsCode().equals(code)) {
                    sum += goods.getSellingPrice() * goods.getStockQuantity();
                }
            }
        }
        return sum;
    }

    // Print method
    public void print() {
        for (Goods goods : goodsList) {
            goods.print();
        }
    }
}

步骤3：测试用例

public class Main {
    public static void main(String[] args) {
        CultureStore store = new CultureStore();

        // Adding goods
        store.addGood(new Goods("G001", "Pen", "Supplier A", 10.5, 100));
        store.addGood(new Goods("G002", "Notebook", "Supplier B", 25.0, 50));

        // Testing methods
        store.print();

        // SaleGood
        double saleAmount = store.saleGood("G001", 20);
        System.out.println("Sale Amount: " + saleAmount);

        // StatGood
        System.out.println("Total Quantity: " + store.totalQuantity());
        System.out.println("Total Value: " + store.totalValue());

        // DelGood
        store.delGood("G002");

        // UpdGood
        Goods updatedGoods = new Goods("G001", "Pen Pro", "Supplier A", 9.99, 80);
        store.updGood("G001", updatedGoods);

        // QueryGood
        Goods queriedGoods = store.queryGood("G001");
        queriedGoods.print();

        // Test print method
        store.print();

        // Test StatGood with specific codes
        List<String> codes = new ArrayList<>();
        codes.add("G001");
        System.out.println("Count by Codes: " + store.countByCodes(codes));
        System.out.println("Value by Codes: " + store.valueByCodes(codes));
    }
}

这个示例代码实现了商品信息管理系统的基本需求。你可以根据实际需求调整和扩展它。注意，这里没有实现中文大写的金额转换，因为Java标准库不支持直接将double类型转换为中文大写数字，你需要引入第三方库或者自己编写一个转换器类来实现这一功能。如果你需要这部分的代码，我可以提供一个简单的实现。