FactoryBean的使用详解...

最新推荐文章于 2025-06-17 16:57:23 发布

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本文介绍了如何使用Spring框架创建Car对象，包括Car类的属性和方法，以及CarFactoryBean类的实现。通过配置文件beans-factory2.xml，演示了如何在Spring应用上下文中实例化并获取Car对象。

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<strong><span style="font-size:14px;">package com.spring.factory2;

public class Car2 {

	private int brand;
	
	private double price;

	public Car2(int brand,double price){
		this.price = price;
		this.brand = brand;
	}
	public int getBrand() {
		return brand;
	}

	public void setBrand(int brand) {
		this.brand = brand;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}
	

	@Override
	public String toString() {
		return "Car [brand=" + brand + ", price=" + price + "]";
	}
	
	
}
</span></strong>

package com.spring.factory2;

import org.springframework.beans.factory.FactoryBean;

public class CarFactoryBean implements FactoryBean<Car2>{

	private int brand;
	
	public void setBrand(int brand) {
		this.brand = brand;
	}

	public Car2 getObject() throws Exception {
		return new Car2(brand,8999);
	}

	public Class<?> getObjectType() {
		return Car2.class;
	}

	public boolean isSingleton() {
		return true;
	}

}

<?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">
	
	
	<bean id="car2" class="com.spring.factory2.CarFactoryBean">
		<property name="brand" value="1000000000"></property>
	</bean>
</beans>

package com.spring.factory2;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
	public static void main(String[] args) {
		ApplicationContext appContext = new ClassPathXmlApplicationContext("beans-factory2.xml");
		Car2 car = (Car2)appContext.getBean("car2");
		System.out.println(car);
	}
}