Spring Autowiring "byType"

byType autowiring in spring

For the System requirements, project required jars and project creation setup steps please refer the below links:-

http://www.javatechtipssharedbygaurav.com/2013/06/spring-beans-autowiring.html

Example of "byType" autowiring mode:-

ShoeCompanyDetails.java

package com.spring.gaurav.autowire.bytype.example;

public class ShoeCompanyDetails {

            private String shoeCompanyName;

            private String companyType;

            private String companyHeadquarters;

            private int companyFoundationyear;

            public String getShoeCompanyName() {

                        return shoeCompanyName;

            }

            public void setShoeCompanyName(String shoeCompanyName) {

                        this.shoeCompanyName = shoeCompanyName;

            }

            public String getCompanyType() {

                        return companyType;

            }

            public void setCompanyType(String companyType) {

                        this.companyType = companyType;

            }

            public String getCompanyHeadquarters() {

                        return companyHeadquarters;

            }

            public void setCompanyHeadquarters(String companyHeadquarters) {

                        this.companyHeadquarters = companyHeadquarters;

            }

            public int getCompanyFoundationyear() {

                        return companyFoundationyear;

            }

            public void setCompanyFoundationyear(int companyFoundationyear) {

                        this.companyFoundationyear = companyFoundationyear;

            }

}

Shoemaker.java

package com.spring.gaurav.autowire.bytype.example;

public class Shoemaker {

            private String companyFounder;

            private ShoeCompanyDetails shoeCompanyDetails;

            public void displayShoemakerCompanyHistory() {

                        System.out.println("SHOE COMPANY NAME :- "

                                                + shoeCompanyDetails.getShoeCompanyName()

                                                + ", \nCOMPANYFOUNDER NAME :- " + companyFounder + ",");

                        System.out.println("COMPANY TYPE :- "

                                                + shoeCompanyDetails.getCompanyType()

                                                + ", \nCOMPANY HEADQUARTERS :- "

                                                + shoeCompanyDetails.getCompanyHeadquarters()

                                                + " \nAND COMPANY FOUNDATION YEAR :- "

                                                + shoeCompanyDetails.getCompanyFoundationyear());

            }

            public String getCompanyFounder() {

                        return companyFounder;

            }

            public void setCompanyFounder(String companyFounder) {

                        this.companyFounder = companyFounder;

            }

            public ShoeCompanyDetails getShoeCompanyDetails() {

                        return shoeCompanyDetails;

            }

            public void setShoeCompanyDetails(ShoeCompanyDetails shoeCompanyDetails) {

                        this.shoeCompanyDetails = shoeCompanyDetails;

            }

}

autowire-mode-bytype-beans.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-3.0.xsd">

  <bean id="shoemakerBean" class="com.spring.gaurav.autowire.bytype.example.Shoemaker" autowire="byType">

        <property name="companyFounder" value="WOLVERINE" />

  </bean>

 

  <bean id="shoeCompanyDetailsId" class="com.spring.gaurav.autowire.bytype.example.ShoeCompanyDetails">

        <property name="shoeCompanyName" value="HUSH PUPPIES" />

        <property name="companyType" value="A DIVISION OF WOLVERINE WORLDWIDE" />

        <property name="companyHeadquarters" value="ROCKFORD, MICHIGAN" />

        <property name="companyFoundationyear" value="1958"></property>

  </bean>

</beans>

ByTypeAutowireClient.java

package com.spring.gaurav.autowire.bytype.example;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ByTypeAutowireClient {

            public static void main(String args[]) {

                        ApplicationContext appContext = new ClassPathXmlApplicationContext(

                                                "autowire-mode-bytype-beans.xml");

                        Shoemaker shoemaker = (Shoemaker) appContext.getBean("shoemakerBean");

                        shoemaker.displayShoemakerCompanyHistory();

            }

}

/**

 * Notes: According to "autowire-mode-bytype-beans.xml" bean file, we called

 * shoemakerBean in this client program, In the xml bean configuration file, we

 * have declared autowire = byType, so according to the byType autowire mode

 * first container will try to find the bean with class attribute

 * ShoeCompanyDetails, as we have declared private ShoeCompanyDetails

 * shoeCompanyDetails in Shoemaker.java file, then it injects shoeCompanyDetails

 * bean class properties which is shoeCompanyName, companyType,

 * companyHeadquarters and companyFoundationyear and injects value of

 * companyFounder property of Shoemaker class.

 *

 */

Result:-

log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).

log4j:WARN Please initialize the log4j system properly.

SHOE COMPANY NAME :- HUSH PUPPIES,

COMPANYFOUNDER NAME :- WOLVERINE,

COMPANY TYPE :- A DIVISION OF WOLVERINE WORLDWIDE,

COMPANY HEADQUARTERS :- ROCKFORD, MICHIGAN

AND COMPANY FOUNDATION YEAR :- 1958

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