Cara menggunakan Java untuk melaksanakan fungsi pengurusan produk sistem CMS

public class ProductService {
    
    private List<Product> productList;
    
    public ProductService() {
        productList = new ArrayList<>();
    }
    
    // 添加商品
    public void addProduct(Product product) {
        productList.add(product);
        System.out.println("商品添加成功！");
    }
    
    // 修改商品信息
    public void updateProduct(Product product) {
        for (Product p : productList) {
            if (p.getId() == product.getId()) {
                p.setName(product.getName());
                p.setPrice(product.getPrice());
                p.setStock(product.getStock());
                p.setCategory(product.getCategory());
                System.out.println("商品信息修改成功！");
                return;
            }
        }
        System.out.println("找不到指定商品！");
    }
    
    // 根据关键字查询商品
    public List<Product> searchProduct(String keyword) {
        List<Product> resultList = new ArrayList<>();
        for (Product p : productList) {
            if (p.getName().contains(keyword)) {
                resultList.add(p);
            }
        }
        return resultList;
    }
    
    // 根据ID删除商品
    public void deleteProduct(int id) {
        for (Product p : productList) {
            if (p.getId() == id) {
                productList.remove(p);
                System.out.println("商品删除成功！");
                return;
            }
        }
        System.out.println("找不到指定商品！");
    }
}

public class Product {
    
    private int id;
    private String name;
    private double price;
    private int stock;
    private String category;
    
    // 省略构造方法和Getter/Setter方法
    
}

public class Main {
    
    public static void main(String[] args) {
        ProductService productService = new ProductService();
        
        // 添加商品
        Product product1 = new Product(1, "手机", 2999.99, 100, "电子产品");
        productService.addProduct(product1);
        
        // 修改商品信息
        Product product2 = new Product(2, "电视", 4999.99, 50, "家用电器");
        productService.updateProduct(product2);
        
        // 根据关键字查询商品
        List<Product> searchResult = productService.searchProduct("手机");
        for (Product p : searchResult) {
            System.out.println(p.getName());
        }
        
        // 删除商品
        productService.deleteProduct(2);
    }
}