How spring configures beans through factorybeans

This article mainly introduces how spring configures beans through factorybeans. The example code in this article is very detailed, which has certain reference value for everyone's study or work. Friends in need can refer to it

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();
  }
}

Output:

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