Friday, 31 August 2018

Spring Auto-Wiring Beans with @Autowired annotation[AutowiredAnnotationBeanPostProcessor]


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https://www.youtube.com/watch?v=_OCzBIVFSEI&list=UUhwKlOVR041tngjerWxVccw

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Spring Auto-Wiring Beans with @Autowired annotation[AutowiredAnnotationBeanPostProcessor]

Spring Auto-Wiring Beans with @Autowired annotation[AutowiredAnnotationBeanPostProcessor]

Spring Auto-Wiring Beans with @Autowired annotation[AutowiredAnnotationBeanPostProcessor]
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>

Address.java

package com.ram.model;

public class Address
{
    private String city;
    private String state;
    private String country;

    public Address(String city, String state, String country)
    {
        this.city = city;
        this.state = state;
        this.country = country;
    }

    @Override
    public String toString()
    {
        return "Address [city=" + city + ", state=" + state + ", country="
                + country + "]";
    }

}

Employee.java

package com.ram.model;

import org.springframework.beans.factory.annotation.Autowired;

public class Employee
{
    private String name;
    @Autowired
    private Address address;

    public Employee(String name)
    {
        System.out.println("Employee(String name) constructor "
                + "is called by the Spring container");
        this.name = name;
    }

    public void displayEmployeeDetails()
    {
        System.out.println(
                "Employee [name=" + name + ", address=" + address + "]");
    }

}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.3.xsd">


    <bean
        class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

    <bean id="address" class="com.ram.model.Address">
        <constructor-arg value="Chennai"></constructor-arg>
        <constructor-arg value="Tamil Nadu"></constructor-arg>
        <constructor-arg value="India"></constructor-arg>
    </bean>

    <bean id="employee" class="com.ram.model.Employee">
        <constructor-arg value="Peter"></constructor-arg>
    </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 employee = (Employee) context.getBean("employee");
        System.out.println(
                "Got employee object from the ApplicationContext[Spring Container]");
     
        employee.displayEmployeeDetails();
    }

}

Output

Aug 17, 2018 10:15:46 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Fri Aug 17 10:15:46 IST 2018]; root of context hierarchy
Aug 17, 2018 10:15:47 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
Employee(String name) constructor is called by the Spring container
---------------------------------------
Got employee object from the ApplicationContext[Spring Container]
Employee [name=Peter, address=Address [city=Chennai, state=Tamil Nadu, country=India]]

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

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

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/32e1a08cd31cd492b211ed76e0174200305d8672/Spring_2018/SpringDemo_AutowiredAnnotationBeanPostProcessor/?at=master

See also:

  • All JavaEE Videos Playlist
  • All JavaEE Videos
  • All JAVA EE Links
  • Spring Tutorial
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
  • Cooking Tutorial
  • Spring Auto-Wiring Beans with @Autowired annotation | Spring @Autowired Annotation | Spring Tutorial


    Click here to watch on Youtube:
    https://www.youtube.com/watch?v=IKIO69MegTc&list=UUhwKlOVR041tngjerWxVccw

    Click the below Image to Enlarge:
    Spring Auto-Wiring Beans with @Autowired annotation | Spring @Autowired Annotation | Spring Tutorial

    Spring Auto-Wiring Beans with @Autowired annotation | Spring @Autowired Annotation | Spring Tutorial

    Spring Auto-Wiring Beans with @Autowired annotation | Spring @Autowired Annotation | 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>

    Address.java

    package com.ram.model;

    public class Address
    {
        private String city;
        private String state;
        private String country;

        public Address(String city, String state, String country)
        {
            this.city = city;
            this.state = state;
            this.country = country;
        }

        @Override
        public String toString()
        {
            return "Address [city=" + city + ", state=" + state + ", country="
                    + country + "]";
        }

    }

    Employee.java

    package com.ram.model;

    import org.springframework.beans.factory.annotation.Autowired;

    public class Employee
    {
        private String name;
        @Autowired
        private Address address;

        public Employee(String name)
        {
            System.out.println("Employee(String name) constructor "
                    + "is called by the Spring container");
            this.name = name;
        }

        public void displayEmployeeDetails()
        {
            System.out.println(
                    "Employee [name=" + name + ", address=" + address + "]");
        }

    }

    applicationContext.xml

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd">


        <context:annotation-config />
     
        <bean id="address" class="com.ram.model.Address" >
            <constructor-arg value="Chennai"></constructor-arg>
            <constructor-arg value="Tamil Nadu"></constructor-arg>
            <constructor-arg value="India"></constructor-arg>
        </bean>

        <bean id="employee" class="com.ram.model.Employee">
            <constructor-arg value="Peter"></constructor-arg>
        </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 employee = (Employee) context.getBean("employee");
            System.out.println(
                    "Got employee object from the ApplicationContext[Spring Container]");
         
            employee.displayEmployeeDetails();
        }

    }

    Output

    Aug 17, 2018 9:50:25 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
    INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Fri Aug 17 09:50:25 IST 2018]; root of context hierarchy
    Aug 17, 2018 9:50:25 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
    Employee(String name) constructor is called by the Spring container
    ---------------------------------------
    Got employee object from the ApplicationContext[Spring Container]
    Employee [name=Peter, address=Address [city=Chennai, state=Tamil Nadu, country=India]]

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

    Github Link:
    https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_Auto-Wiring_Beans_Autowired

    Bitbucket Link:
    https://bitbucket.org/ramram43210/spring/src/32e1a08cd31cd492b211ed76e0174200305d8672/Spring_2018/SpringDemo_Auto-Wiring_Beans_Autowired/?at=master

    See also:

  • All JavaEE Videos Playlist
  • All JavaEE Videos
  • All JAVA EE Links
  • Spring Tutorial
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
  • Cooking Tutorial
  • How to filter components in auto scanning? | Spring Filter components in auto scanning


    Click here to watch on Youtube:
    https://www.youtube.com/watch?v=ikkEXDEmHLs&list=UUhwKlOVR041tngjerWxVccw

    Click the below Image to Enlarge:
    How to filter components in auto scanning? | Spring Filter components in auto scanning

    How to filter components in auto scanning? | Spring Filter components in auto scanning


    How to filter components in auto scanning? | Spring Filter components in auto scanning
    How to filter components in auto scanning? | Spring Filter components in auto scanning

    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>

    EmployeeDAO.java

    package com.ram.dao;

    public class EmployeeDAO
    {
        public void addEmployee()
        {
            System.out.println("inside EmployeeDAO addEmployee()");
        }

    }

    EmployeeService.java

    package com.ram.service;

    import org.springframework.beans.factory.annotation.Autowired;

    import com.ram.dao.EmployeeDAO;

    public class EmployeeService
    {
        @Autowired
        EmployeeDAO employeeDAO;

        public void addEmployee()
        {
            System.out.println("inside EmployeeService addEmployee()");
            employeeDAO.addEmployee();
        }

        @Override
        public String toString()
        {
            return "EmployeeService [employeeDAO=" + employeeDAO + "]";
        }

    }

    applicationContext.xml

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd">


        <context:component-scan base-package="com.ram">

            <context:include-filter type="regex"
                expression="com.ram.dao.*DAO.*" />

            <context:include-filter type="regex"
                expression="com.ram.service.*Service.*" />

        </context:component-scan>

    </beans>

    App.java

    package com.ram.core;

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

    import com.ram.service.EmployeeService;

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

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

            EmployeeService employeeService = context.getBean("employeeService",
                    EmployeeService.class);
            System.out.println(
                    "Got employeeService object from the ApplicationContext(Spring Container)");

            System.out.println(employeeService);

            employeeService.addEmployee();

        }

    }

    Output

    Aug 16, 2018 9:31:41 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
    INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Thu Aug 16 09:31:41 IST 2018]; root of context hierarchy
    Aug 16, 2018 9:31:41 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
    ---------------------------------------
    Got employeeService object from the ApplicationContext(Spring Container)
    EmployeeService [employeeDAO=com.ram.dao.EmployeeDAO@782663d3]
    inside EmployeeService addEmployee()
    inside EmployeeDAO addEmployee()

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

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

    Bitbucket Link:
    https://bitbucket.org/ramram43210/spring/src/32e1a08cd31cd492b211ed76e0174200305d8672/Spring_2018/SpringDemo_Filter_auto_scanning/?at=master

    See also:

  • All JavaEE Videos Playlist
  • All JavaEE Videos
  • All JAVA EE Links
  • Spring Tutorial
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
  • Cooking Tutorial
  • Thursday, 30 August 2018

    Spring Auto Scanning Components | Spring Component Scan | Spring Tutorial | Spring Framework | Spring basics - Playlist

    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework


    Click here to watch on Youtube:
    https://www.youtube.com/watch?v=fR7vOA_6Zc8&list=UUhwKlOVR041tngjerWxVccw

    Click the below Image to Enlarge:
    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework

    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework

    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework

    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework

    Spring Auto Component Scan - Annotation Types | Spring Tutorial | Spring Framework

    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>

    EmployeeDAO.java

    package com.ram.dao;

    import org.springframework.stereotype.Repository;

    @Repository
    public class EmployeeDAO
    {
        public void addEmployee()
        {
            System.out.println("inside EmployeeDAO addEmployee()");
        }

    }

    EmployeeService.java

    package com.ram.service;

    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;

    import com.ram.dao.EmployeeDAO;

    @Service
    public class EmployeeService
    {
        @Autowired
        EmployeeDAO employeeDAO;

        public void addEmployee()
        {
            System.out.println("inside EmployeeService addEmployee()");
            employeeDAO.addEmployee();
        }

        @Override
        public String toString()
        {
            return "EmployeeService [employeeDAO=" + employeeDAO + "]";
        }

    }

    applicationContext.xml

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd">


        <context:component-scan base-package="com.ram" />

    </beans>

    App.java

    package com.ram.core;

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

    import com.ram.service.EmployeeService;

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

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

            EmployeeService employeeService = context.getBean("employeeService",
                    EmployeeService.class);
            System.out.println(
                    "Got employeeService object from the ApplicationContext(Spring Container)");

            System.out.println(employeeService);

            employeeService.addEmployee();

        }

    }

    Output

    Aug 15, 2018 10:55:59 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
    INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Wed Aug 15 10:55:59 IST 2018]; root of context hierarchy
    Aug 15, 2018 10:55:59 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
    ---------------------------------------
    Got employeeService object from the ApplicationContext(Spring Container)
    EmployeeService [employeeDAO=com.ram.dao.EmployeeDAO@6483f5ae]
    inside EmployeeService addEmployee()
    inside EmployeeDAO addEmployee()

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

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

    Bitbucket Link:
    https://bitbucket.org/ramram43210/spring/src/2f0ee6744281e17ef2c1f3108f6c0aead72b706a/Spring_2018/SpringDemo_Annotation_types/?at=master

    See also:

  • All JavaEE Videos Playlist
  • All JavaEE Videos
  • All JAVA EE Links
  • Spring Tutorial
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
  • Cooking Tutorial