getObject of method instance resolution in spring FactoryBean

This paper mainly studies the relevant contents of getObject() method in FactoryBean in spring, as follows.

The FactoryBean interface defines the following three interface methods:

Object getObject(): Returns an instance of Bean that was created by FactoryBean. If isSingleton() returns true, the instance will be placed in the single-instance cache pool of the Spring container. boolean isSingleton(): Determines whether the scope of Bean created by FactoryBean is singleton or prototype. Class getObjectType(): Returns the type in which FactoryBean created Bean.

When in the configuration file < bean > FactoryBean#getObject() is the object returned by FactoryBean#getObject(), which is a proxy for getBean(). FactoryBean# getObject() is a proxy for getBean().

When we configure Car, there is one for each of the Car attributes < property > Element tags. Suppose we want to specify configuration values for all properties of Car once in a comma-separated way, rather than in a neat way, we can write a single FactroyBean to achieve this:

import org.springframework.beans.factory.FactoryBean;
public class CarFactoryBean implements FactoryBean{
	private String carInfo;
	public Stirng getCarInfo(){
		return carInfo;
	}
	public void setCarInfo(String carInfo){
		this.carInfo=carInfo;
	}
	public Object getObject()throws Exception{
		Car car=new Car();
		String[]infos = carInfo.split(",");
		car.setBrand(infos[0]);
		car.setMaxSpeed(Integer.aarseint(infos[1]));
		car.setPrice(double.parsedouble(infos[2]));
		return car;
	}
	public Class getObjectType(){
		return Car.class;
	}
	public Boolean isSingleton() {
		return true;
	}
}

Now that we have CarFactoryBean, we can define Car Bean in the configuration file using the following configuration:

<bean id="car" class="com.lxm.fb.carFactoryBean">  
 
     <property name="carInfo" value=" The red flag CA72,200,20000.00"/>  
 
</bean>  

When ES56en (" ES57en ") is called, ES58en discovers through reflection that ES59en implements the interface of ES60en, at which point the Sping container calls the interface method CarFactoryBean# ES63en () to return the object created by the factory class. If the user wants to obtain an instance of CarFactoryBean, it is necessary to explicitly prefix beanName with" & "Front: getBean(" & car").

conclusion

This article is about the ES78en () method in ES77en ES76en instance resolution of all content, I hope to help you. Interested friends can continue to refer to the site of other related topics, if there are shortcomings, welcome to leave a message to point out. Thank you for your support!