Spring Bean Definition Inheritance | Spring Boot

#springbean #springboot #inheritance

https://grokonez.com/spring-framework/spring-bean-definition-inheritance-spring-boot

Bean Definition Inheritance is a good solution for defining new bean which inherited certain bean conveniently.

We will learn how to use XML configuration to create Inheritance from Bean with parent or abstract template.

I. Demo Video

II. Technology

Java 1.8
Maven 3.3.9
Spring Tool Suite – Version 3.8.1.RELEASE
Spring Boot: 1.4.0.RELEASE
III. Overview

1. Goal
To build an application that runs with beans:
customerService is bean parent of:
anotherCustomerService: bean without declaring new class (use the same class as customerService)
telephoneService: bean of new class, inherit property from customerService and add new property too.
beanWelcomeTemplate: a parent bean as abstract template that child beans can inherit.
consultationService: child bean of beanWelcomeTemplate
2. Project Structure

3. Step to do
Create Spring Boot project
Create Services
Create Spring Bean Configuration File
Create a Web Controller
Run Spring Boot Application & Enjoy Result
IV. Practice

1. Create Spring Boot project
Open Spring Tool Suite, on Menu, choose File -> New -> Spring Starter Project, then fill each field:

Click Next, in Web: choose Web:

Click Finish. Spring Boot project will be created successfully.

2. Create Services

Under package service, create class CustomerService and SpecificService</strong.

Content of CustomerService.java:


public class CustomerService {
    private String welcomeMessage;
    private String customerName;

    public String getWelcomeMessage() {
        return welcomeMessage;
    }

    public void setWelcomeMessage(String welcomeMessage) {
        this.welcomeMessage = welcomeMessage;
    }

    public String getCustomerName() {
        return customerName;
    }

    public void setCustomerName(String customerName) {
        this.customerName = customerName;
    }

    public String sayHello() {
        return welcomeMessage + " " + customerName;
    }
}

Content of SpecificService.java:

More at:

https://grokonez.com/spring-framework/spring-bean-definition-inheritance-spring-boot

Spring Bean Definition Inheritance | Spring Boot