1、实现Spring 提供的FactoryBean接口
package com.spring.facoryBean;
import org.springframework.beans.factory.FactoryBean;
public class CarFactoryBean implements FactoryBean<Car> {
private String brand;
public void setBrand(String brand) {
this.brand = brand;
}
public Car getObject() throws Exception {
return new Car(brand);
}
public Class<?> getObjectType() {
return Car.class;
}
public boolean isSingleton() {
return true;
}
}
2、配置xml文件
<?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-3.0.xsd"> <!--
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 实际返回的是FactoryBean 的 getObject 方法的得到的实例 -->
<bean id="car" class="com.spring.facoryBean.CarFactoryBean">
<property name="brand" value="BMW"></property>
</bean>
</beans>
3、bean文件
package com.spring.facoryBean;
public class Car {
public Car(String brand) {
this.brand = brand;
}
@Override
public String toString() {
return "Car [brand=" + brand + "]";
}
private String brand;
public void setBrand(String brand){
System.out.println("setBrand...");
this.brand = brand;
}
public void init(){
System.out.println("init...");
}
public void destroy(){
System.out.println("destroy...");
}
}
4、main方法实现
package com.spring.facoryBean; import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext; public class main {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("bean-beanFactory.xml");
Car car = (Car)ctx.getBean("car");
System.out.println(car);
}
}