Spring IOC

@Named and @Component annotations are used for the same purpose. Both the annotations are used for enabling a class to be auto detected as the bean definition for spring’s application context. The following are the main different of these two annotations. @Named is part of the. Java specification. It is more recommended since this annotation …

In my previous post I have explained how to inherit collection values from the parent bean. Spring offers out of the box support on inheritance for the bean definitions in the XML configuration file. You can define any number of beans and extend them by using the parent  attribute in the bean element. Child bean can …

In my previous post I have explained about how to use collections in Spring. This tutorial explains how to merge collections or inherit the values from the parent bean. In some scenarios we need to define a bean as abstract using the abstract=true in the bean definition. It means that another bean definition will be …

This tutorial explains how to use the collections API with Spring configurations. Spring provides out of the box support for all the collections classes like List, Set, Map and Properties for injecting the objects. There is a corresponding elements in the spring configuration file to pass the values to the Java objects. This tutorial passes …

This tutorial explains one of the basic mistake done by the spring developers while defining the spring beans. Spring will not allow Circular Dependency and will throw an exception (BeanCurrentlyInCreationException) at the time of loading the configuration files. Also it is not good practice to design your project to have the circular dependency. What is …

Initialization callback methods Springframework provides flexibility to initialize its Beans using the user defined methods. There is some scenario where application developer want to initialize the beans properties after setting all the values. The following example program demonstrates by defining a custom method to initialize the calues. Spring’s managed bean has to implement InitializingBean from …

Inner beans Spring IOC allows Inner Beans declaration. We can declare a bean inside a beans. But, it has few restriction. Inner Beans are like annonymous beans where it is created and used on the fly. this beans cannot be used outside the enclosing beans. So, it is wise to avoid declaring the ‘ID‘ or …

Setter Injection This article presents how to write the Setter Injection in Spring IOC. There are two types of Dependency Injection(DI) techniques we can use. 1) Setter Injection and 2) Constructor Injection. also read: Spring Tutorials Spring 4 Tutorials Spring Interview Questions As the name implies, using setter methods in a bean class the Spring …