工厂模式和抽象工厂模式

package com.factory;

/**
 * 工厂模式
 */
public class FactoryModelDemo {

	public static void main(String[] args) {

		ProductFactory productFactory = new ProductFactory();

		Product product = productFactory.createProduct("bus");

		System.out.println(product);
	}

}

class Product {

	private String productNo;

	private String msg;

	public Product() {
		super();
	}

	public Product(String productNo, String msg) {
		super();
		this.productNo = productNo;
		this.msg = msg;
	}

	public String getProductNo() {
		return productNo;
	}

	public void setProductNo(String productNo) {
		this.productNo = productNo;
	}

	public String getMsg() {
		return msg;
	}

	public void setMsg(String msg) {
		this.msg = msg;
	}

	@Override
	public String toString() {
		return "Product [productNo=" + productNo + ", msg=" + msg + "]";
	}

}

/**
 * 抽象工厂
 */
interface IProductFactory {

	Product createProduct(String productNo);
}

/**
 * car factory---具体工厂
 */
class ProductFactoryCar implements IProductFactory {

	@Override
	public Product createProduct(String productNo) {
		Product product = new Product(productNo, "buy a car");
		return product;
	}

}

/**
 * bus factory---具体工厂
 */
class ProductFactoryBus implements IProductFactory {

	@Override
	public Product createProduct(String productNo) {
		Product product = new Product(productNo, "buy a bus");
		return product;
	}

}

/**
 * truck factory---具体工厂
 */
class ProductFactoryTruck implements IProductFactory {

	@Override
	public Product createProduct(String productNo) {
		Product product = new Product(productNo, "buy a truck");
		return product;
	}

}

/**
 * 抽象工厂
 */
class ProductFactory implements IProductFactory {

	@Override
	public Product createProduct(String productNo) {

		IProductFactory productFactory = null;

		switch (productNo) {
		case "car":
			productFactory = new ProductFactoryCar();
			break;
		case "bus":
			productFactory = new ProductFactoryBus();
			break;
		case "truck":
			productFactory = new ProductFactoryTruck();
			break;
		}

		if (null != productFactory) {
			return productFactory.createProduct(productNo);
		}

		return null;
	}

}