Java工廠中，對于產品的入庫和出庫是非常重要的環節。本文就針對這兩個環節分別進行說明：

1. 產品入庫

public class Product {
private String name;
private int quantity;
public void setName(String name) {
this.name = name;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public String getName() {
return name;
}
public int getQuantity() {
return quantity;
}
}
public interface ProductFactory {
Product createProduct(String name);
void storeProduct(Product product);
}
public class ProductFactoryImpl implements ProductFactory {
@Override
public Product createProduct(String name) {
Product product = new Product();
product.setName(name);
product.setQuantity(0);
return product;
}
@Override
public void storeProduct(Product product) {
// 存儲產品到數據庫或其他存儲設備中
}
}

上述代碼展示了產品類和產品工廠類，其中產品類包含了產品的名稱(name)和數量(quantity)屬性，而產品工廠類除了創建產品(createProduct)外，還提供了將產品存儲(storeProduct)功能。在產品入庫時，只需調用工廠類的createProduct方法創建一個新的產品，再調用storeProduct方法進行存儲即可。

2. 產品出庫

public class Warehouse {
private Mapproducts;
public Warehouse() {
products = new HashMap<>();
}
public void addProduct(String name, int quantity) {
if (products.containsKey(name)) {
products.put(name, products.get(name) + quantity);
} else {
products.put(name, quantity);
}
}
public boolean removeProduct(String name, int quantity) {
if (!products.containsKey(name)) {
return false;
}
int currentQuantity = products.get(name);
if (quantity >currentQuantity) {
return false;
}
products.put(name, currentQuantity - quantity);
return true;
}
}
public class ProductFactoryImpl implements ProductFactory {
private Warehouse warehouse;
public ProductFactoryImpl() {
warehouse = new Warehouse();
}
@Override
public Product createProduct(String name) {
Product product = new Product();
product.setName(name);
product.setQuantity(0);
warehouse.addProduct(name, 0);
return product;
}
@Override
public void storeProduct(Product product) {
warehouse.addProduct(product.getName(), product.getQuantity());
}
public boolean removeProduct(String name, int quantity) {
return warehouse.removeProduct(name, quantity);
}
}

上述代碼展示了一個倉庫(Warehouse)類和針對產品出庫的修改后的產品工廠類。在倉庫類中，我們使用Map存儲了產品名稱(name)和數量(quantity)的對應關系。在進行產品出庫時，只需調用工廠類的removeProduct方法，指定對應的產品名稱和數量即可。如果對應產品不存在或庫存不足，則removeProduct方法返回false。