Spring的实例工厂方法和静态工厂方法实例代码

package com.zhu.string.factory;  import java.util.HashMap; import java.util.Map;  public class StaticCarFactory {   /**    * 静态工厂方法：直接调用静态方法可以返回Bean的实例    *    */   private static Map<String ,Car > cars=new HashMap<String , Car>();   static{     cars.put("audi",  new Car(3000, "aodi"));     cars.put("fodo",  new Car(3000, "aodi"));   }   //静态工厂方法   public static Car getCar(String name){        return cars.get(name);   } } 

package com.zhu.string.factory;  import java.util.HashMap; import java.util.Map;  public class InstanceCarFactory {   /**    * 实例工厂方法。即调用工厂本身，再调用工厂的实例方法来返回bean实例    */   private Map<String ,Car> cars=null;   public InstanceCarFactory() {     // TODO Auto-generated constructor stub     cars=new HashMap<String, Car>();     cars.put("audi", new Car(1000,"audi"));     cars.put("dffdas", new Car(2000,"audi"));   }   public Car getCar(String brand){     return cars.get(brand);   } } 

<span style="font-size:14px;"><?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xmlns:p="http://www.springframework.org/schema/p"   xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">    <!-- 通过静态方法来配置bean,注意不是配置静态工厂方法实例，而是配置bean实例  -->   <!--     class属性：指向静态方法的全类名 factory-method：指向静态方法的名字     constructor-arg:如果工厂方法需要传入参数，则使用constructor-arg来配  置参数   -->   <bean id="car1" factory-method="getCar"     class="com.zhu.string.factory.StaticCarFactory">     <constructor-arg value="audi"></constructor-arg>   </bean>   <!-- 配置工厂的实例 -->   <bean id="carFactory" class="com.zhu.string.factory.InstanceCarFactory">   </bean>   <bean id="car2" factory-bean="carFactory" factory-method="getCar">     <constructor-arg value="audi"></constructor-arg>   </bean> </beans></span> 

package com.zhu.string.factory;public class Car {	private double price;	private String brand;	public double getPrice() {		return price;	}	public void setPrice(double price) {		this.price = price;	}	public String getBrand() {		return brand;	}	public void setBrand(String brand) {		this.brand = brand;	}	@Override 	  public String toString() {		return "Car [brand=" + brand + ", price=" + price + "]";	}	public Car(){		System.out.println("cars....constructor");	}	public Car(double price, String brand) {		super();		this.price = price;		this.brand = brand;	}}

package com.zhu.string.factory;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Main {	/**    * @param args    */	public static void main(String[] args) {		// TODO Auto-generated method stub 		ApplicationContext cx=new ClassPathXmlApplicationContext("beans- factory.xml");		Car car1=(Car) cx.getBean("car1");		System.out.println(car1);		Car car2=(Car) cx.getBean("car2");		System.out.println(car2);	}}