spring FactoryBean

1.car 类

package com.hxzy.factorybean;

public class Car {

private String brand;

private String address;

public void setBrand(String brand) {

this.brand = brand;

}

public void setAddress(String address) {

this.address = address;

}

public Car() {

}

public Car(String brand, String address) {

super();

this.brand = brand;

this.address = address;

}

@Override

public String toString() {

return "Car [brand=" + brand + ", address=" + address + "]";

}

}

2.自定义工厂类

package com.hxzy.factorybean;

import org.springframework.beans.factory.FactoryBean;

//自定义的工厂bean需要实现factorybean接口

public class CarFactoryBean implements FactoryBean<Car>{

private String brand;

public void setBrand(String brand) {

this.brand = brand;

}

@Override

public Car getObject() throws Exception {

return new Car("jac", "合肥");

}

@Override

public Class<?> getObjectType() {

return Car.class;

}

@Override

public boolean isSingleton() {

return true;

}

}

3.bean 配置文件

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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

但实际返回的实例却是FactoryBean的getObject()方法返回的实例-->

<bean id="car" class="com.hxzy.factorybean.CarFactoryBean">

<property name="brand" value="jac"></property>

</bean>

</beans>

4.测试类

ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beanfactory.xml");

Car car = (Car) ctx.getBean("car");

System.out.println(car);

ctx.close();