Spring FactoryBean 配置 Bean

// 自定义的FactoryBean 需要实现FactoryBean接口
public class CarFactoryBean implements FactoryBean<Car> {
    @Override
    public Car getObject() throws Exception {
        return new Car("BMW",500000);
    }
    // 返回的bean的类型
    @Override
    public Class<?> getObjectType() {
        return Car.class;
    }
    @Override
    public boolean isSingleton() {
        return true;
    }
    private String brand;
    public void setBrand(String brand){
        this.brand = brand;
    }
}
// XML
 <!-- 通过FactoryBean来配置Bean的实例
        class：指向FactoryBean的全类名
        property：配置FactoryBean的属性
        但实际返回的实例确实FactoryBean的getObject()方法来返回的实例
-->
<bean id="car" class="com.sangyu.test04.CarFactoryBean">
      <property name="brand" value="BMW"></property>
</bean>