Spring Setter Injection

Here in this example you will see another different type of injection known as setter injection

Here in this example you will see another different type of injection known as setter injection

Basic Setter Injection

Here in this example you will see another different type of injection known as setter injection which is the preferred method dependency injection in Spring. The convention of writing the setter method is that start the method name with set and add the method name start with capital character like setMessage or setName.

SetterInjection.java


package net.roseindia;



public class SetterInjection {

  private String message = null;



  public String getMessage() {

    return message;

  }



  public void setMessage(String message) {

    this.message = message;

  }

}




SetterInjectionTest.java

package net.roseindia;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SetterInjectionTest {
  public static void main(String[] args) {
    BeanFactory beanfactory = new ClassPathXmlApplicationContext(
        "context.xml");
    SetterInjection bean = (SetterInjection) beanfactory.getBean("message");
    String msg = bean.getMessage();
    System.out.println(msg);
  }
}

context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
  xsi:schemaLocation="http://www.springframework.org/schema/
beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
  <bean id="message" class="net.roseindia.SetterInjection">
    <property name="message" value="Spring is simple." />
  </bean>
</beans>

When you run this application it display output as shown below:

Spring is simple

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