Friday 13 April 2018

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial


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What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

What is IoC Container in Spring?_V1 | What is Spring IoC Container? | Spring Tutorial

Maven Command.txt

Compile:

mvn clean compile

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;

/**
 * Spring bean
 *
 */

public class Employee
{
    private String name;

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

    public void employeeDetails()
    {
        System.out.println("Employee Name =  " + name);
    }
}

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="employee" class="com.ram.model.Employee">
        <property name="name" value="Peter" />
    </bean>

</beans>

App.java

package com.ram.core;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import com.ram.model.Employee;

public class App
{
    public static void main(String[] args)
    {
        usingBeanFactory();
        usingApplicationContext();

    }

    private static void usingBeanFactory()
    {
        System.out.println("************* Using BeanFactory ************* ");
        Resource resource = new ClassPathResource("applicationContext.xml");
        BeanFactory factory = new XmlBeanFactory(resource);

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

        Employee employee = (Employee) factory.getBean("employee");
        System.out.println(
                "Got employee object from the BeanFactory(Spring Container)");
        employee.employeeDetails();
    }

    private static void usingApplicationContext()
    {
        System.out.println("\n************* Using ApplicationContext ******* ");
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "applicationContext.xml");

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

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

Output.txt

************* Using BeanFactory *************
Apr 05, 2018 9:44:21 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Got employee object from the BeanFactory(Spring Container)
Employee Name =  Peter

************* Using ApplicationContext *******
Apr 05, 2018 9:44:22 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@26ba2a48: startup date [Thu Apr 05 09:44:22 IST 2018]; root of context hierarchy
Apr 05, 2018 9:44:22 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Got employee object from the ApplicationContext(Spring Container)
Employee Name =  Peter

Click the below link to download the code:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_IOC_Container_V1.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_IOC_Container_V1

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/a60a91aa34013374c842d2668a441068c9cc47ff/Spring_2018/SpringDemo_IOC_Container_V1/?at=master

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