Spring bean configuration for inheritance [Override base bean value] | Spring Tutorial

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Spring bean configuration for inheritance [Override base bean value] | Spring Tutorial

Spring bean configuration for inheritance [Override base bean value] | Spring Tutorial

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0%20http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ram.core</groupId>
    <artifactId>SpringDemo</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringDemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <spring.version>5.0.2.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- Spring 5 dependencies -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
    </dependencies>
</project>

Employee.java

package com.ram.model;

public class Employee
{
    private int id;
    private String name;
    private String countryName;

    public int getId()
    {
        return id;
    }

    public void setId(int id)
    {
        this.id = id;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getCountryName()
    {
        return countryName;
    }

    public void setCountryName(String countryName)
    {
        this.countryName = countryName;
    }

    @Override
    public String toString()
    {
        return "Employee [id=" + id + ", name=" + name + ", countryName="
                + countryName + "]";
    }

}

applicationContext.xml

<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-4.3.xsd">

    <bean id="baseEmployeeJapan" class="com.ram.model.Employee" abstract="true">
        <property name="countryName" value="Japan" />
    </bean>

    <bean id="employee1" class="com.ram.model.Employee" parent="baseEmployeeJapan">
        <property name="id" value="32" />
        <property name="name" value="Peter" />
        <property name="countryName" value="India" />
    </bean>

    <bean id="employee2" class="com.ram.model.Employee" parent="baseEmployeeJapan">
        <property name="id" value="33" />
        <property name="name" value="John" />
    </bean>

</beans>

App.java

package com.ram.core;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.model.Employee;

public class App
{
    public static void main(String[] args)
    {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "applicationContext.xml");

        System.out.println("---------------------------------------");

        Employee employee1 = (Employee) context.getBean("employee1");
        System.out.println(
                "Got employee1 object from the ApplicationContext(Spring Container)");

        System.out.println(employee1);
     
        System.out.println("---------------------------------------");

        Employee employee2 = (Employee) context.getBean("employee2");
        System.out.println(
                "Got employee2 object from the ApplicationContext(Spring Container)");

        System.out.println(employee2);

    }

}

Output

Aug 04, 2018 9:14:37 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Sat Aug 04 09:14:37 IST 2018]; root of context hierarchy
Aug 04, 2018 9:14:37 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Got employee1 object from the ApplicationContext(Spring Container)
Employee [id=32, name=Peter, countryName=India]
---------------------------------------
Got employee2 object from the ApplicationContext(Spring Container)
Employee [id=33, name=John, countryName=Japan]

Click the below link to download the code:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_inheritance_override.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_inheritance_override

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/eb94a9e0ae07f3c6a86034ef414051430bbfc9bc/Spring_2018/SpringDemo_inheritance_override/?at=master

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