spring Annotation How to Specify InitMethod and DestroyMethod for bean

Directory spring annotation specifies InitMethod and DestroyMethod for bean. Below is the specific code. Note initMethod and destroyMethod in @ Bean

The spring annotation specifies InitMethod and DestroyMethod for bean

/**
 *   Specifies the formed init Methods and destroy Several methods of 
 *      1 In the configuration class  @Bean(initMethod = "init",destroyMethod = "destory") Annotation Specification 
 *      2 : Implementation InitializingBean Interface overrides its afterPropertiesSet Method, implementing DisposableBean Interface rewriting destroy Method 
 *      3 : Use java Adj. JSR250 In the specification @PostConstruct Marked in init Methodologically, @PreDestroy Marked in destroy On the annotation 
 */

It should be noted that:

Single instance bean: Create an object when the container starts Multi-instance bean: Create an object every time you get it

Initialization:

Object creation is completed, assignment is completed, and initialization method is called

Destroy:

Single instance: Called when the container is closed Multiple instances: The container will not be destroyed, and the destruction method can only be called manually

The following is the specific code

Car.java

public class Car { 
    public Car() {
        System.out.println("Car's Constructor..");
    }
 
    public void init(){
        System.out.println("Car's Init...");
    }
 
    public void destory(){
        System.out.println("Car's Destroy...");
    } 
}

Configuration class

    @Bean(initMethod = "init",destroyMethod = "destory")
    public Car car(){
        return new Car();
    }

Note initMethod and destroyMethod in @ Bean

@Configuration
public class AppConfig {
@Bean(initMethod = "init")
public Foo foo() {
return new Foo();
}
@Bean(destroyMethod = "cleanup")
public Bar bar() {
return new Bar();
}
}

There are no parentheses after initMethod and destroyMethod in the above code.

Remember never to put brackets.