【定制排序、使用比较器】 商品属性Production // 价格、商品名、销量、评论数、客户收藏数量 现有商品的仓库，提供了三个方法 --商品集合【属性】 --实现商品的价格降序排序（） --实现商品的价格升序序排序（） --实现商品的排序（入参比较器【匿名内部类】）

以下为可能的实现代码：

public class Product {
    private String name;
    private double price;
    private int sales;
    private int comments;
    private int favorites;

    // getters and setters

    // constructor

    @Override
    public String toString() {
        return "Product{" +
                "name='" + name + '\'' +
                ", price=" + price +
                ", sales=" + sales +
                ", comments=" + comments +
                ", favorites=" + favorites +
                '}';
    }
}

public class ProductWarehouse {
    private List<Product> products = new ArrayList<>();

    public List<Product> getProducts() {
        return products;
    }

    public void addProduct(Product product) {
        products.add(product);
    }

    public void sortDescendingByPrice() {
        products.sort((p1, p2) -> Double.compare(p2.getPrice(), p1.getPrice()));
    }

    public void sortAscendingByPrice() {
        products.sort((p1, p2) -> Double.compare(p1.getPrice(), p2.getPrice()));
    }

    public void sort(Comparator<Product> comparator) {
        products.sort(comparator);
    }
}

使用示例：

ProductWarehouse warehouse = new ProductWarehouse();
// add some products to the warehouse

// sort descending by price
warehouse.sortDescendingByPrice();
System.out.println(warehouse.getProducts());

// sort ascending by price
warehouse.sortAscendingByPrice();
System.out.println(warehouse.getProducts());

// sort by sales
warehouse.sort((p1, p2) -> Integer.compare(p2.getSales(), p1.getSales()));
System.out.println(warehouse.getProducts());

// sort by comments
warehouse.sort((p1, p2) -> Integer.compare(p2.getComments(), p1.getComments()));
System.out.println(warehouse.getProducts());

// sort by favorites
warehouse.sort((p1, p2) -> Integer.compare(p2.getFavorites(), p1.getFavorites()));
System.out.println(warehouse.getProducts());