spring中怎么利用FactoryBean配置Bean
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Car.java
package com.gong.spring.beans.factoryBean;public class Car { private String name; private double price; public String getName() { return name; } public void setName(String name) { this.name = name; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public Car(String name, double price) { super(); this.name = name; this.price = price; } @Override public String toString() { return "Car [name=" + name + ", price=" + price + "]"; }}
CarFactoryBean.java
package com.gong.spring.beans.factoryBean;import org.springframework.beans.factory.FactoryBean;public class CarFactoryBean implements FactoryBean<Car> { private String name; public void setName(String name) { this.name = name; } //返回Bean的对象 @Override public Car getObject() throws Exception { // TODO Auto-generated method stub return new Car(name,200000); } //返回bean的类型 @Override public Class<?> getObjectType() { // TODO Auto-generated method stub return Car.class; } //是否是单例 @Override public boolean isSingleton() { // TODO Auto-generated method stub return true; }}
beans-factoryBean.xml
<?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"> <bean id="car" class="com.gong.spring.beans.factoryBean.CarFactoryBean"> <property name="name" value="baoma"></property> </bean></beans>
Main.java
package com.gong.spring.beans.factoryBean;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Main { public static void main(String[] args) { //1.创建spring的IOC容器对象 ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans-factoryBean.xml"); //2.从容器中获取Bean实例 Car car = (Car) ctx.getBean("car"); System.out.println(car.toString()); ctx.close(); }}
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