使用Java开发仓库管理系统的商品管理功能

public class Goods {
    private int id;
    private String name;
    private double price;
    private int quantity;

    // 构造方法
    public Goods(int id, String name, double price, int quantity) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.quantity = quantity;
    }

    // 获取商品编号
    public int getId() {
        return id;
    }

    // 获取商品名称
    public String getName() {
        return name;
    }

    // 获取商品价格
    public double getPrice() {
        return price;
    }

    // 获取商品数量
    public int getQuantity() {
        return quantity;
    }

    // 修改商品数量
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    // 展示商品信息
    public void displayInfo() {
        System.out.println("商品编号：" + id);
        System.out.println("商品名称：" + name);
        System.out.println("商品价格：" + price);
        System.out.println("商品数量：" + quantity);
    }
}

import java.util.ArrayList;
import java.util.List;

public class GoodsManagement {
    private List<Goods> goodsList;

    // 构造方法
    public GoodsManagement() {
        goodsList = new ArrayList<>();
    }

    // 增加商品
    public void addGoods(Goods goods) {
        goodsList.add(goods);
    }

    // 删除商品
    public void deleteGoods(int id) {
        for (Goods goods : goodsList) {
            if (goods.getId() == id) {
                goodsList.remove(goods);
                break;
            }
        }
    }

    // 修改商品数量
    public void updateGoodsQuantity(int id, int quantity) {
        for (Goods goods : goodsList) {
            if (goods.getId() == id) {
                goods.setQuantity(quantity);
                break;
            }
        }
    }

    // 查找商品
    public Goods findGoods(int id) {
        for (Goods goods : goodsList) {
            if (goods.getId() == id) {
                return goods;
            }
        }
        return null;
    }

    // 展示所有商品信息
    public void displayAllGoods() {
        for (Goods goods : goodsList) {
            goods.displayInfo();
            System.out.println("--------------------------");
        }
    }
}

public class Test {
    public static void main(String[] args) {
        GoodsManagement goodsManagement = new GoodsManagement();

        // 添加商品
        Goods goods1 = new Goods(1, "商品1", 10.0, 50);
        Goods goods2 = new Goods(2, "商品2", 20.0, 30);
        goodsManagement.addGoods(goods1);
        goodsManagement.addGoods(goods2);

        // 查找并修改商品数量
        Goods goods = goodsManagement.findGoods(1);
        if (goods != null) {
            System.out.println("找到商品：");
            goods.displayInfo();
            System.out.println("--------------------------");

            goodsManagement.updateGoodsQuantity(1, 20);
        }

        // 删除商品
        goodsManagement.deleteGoods(2);

        // 展示所有商品信息
        goodsManagement.displayAllGoods();
    }
}