Setter Injection in Spring Example

Setter Injection in Spring Example

Setter injection is a bean wiring technique in which JavaBean setter methods are used for setting bean properties to the objects that need them.

Directory Structure:

employee.java

package com.javainfinite;

public class employee {
    
    private String ename;
    private int id;

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) { //setEname this sets the property value for the object ename - defined in application Context.xml
        this.ename = ename;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) { //setID sets property value for object id - defined in applicationContext.xml
        this.id = id;
    }
    
    public void display()
    {
        System.out.println("Employee name: "+getEname()+" ID: "+getId());
    }
    
}

operational.java

package com.javainfinite;

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


public class operational {
    
    public static void main(String args[])
    {
        ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
        employee emp=(employee) ac.getBean("employee");
        emp.display();
    }
    
}

applicationContext.xml

<?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?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:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">


<bean id="employee" class="com.javainfinite.employee">
        <property name="ename" value="Alpha"/>
        <property name="id" value="23"/>
    </bean>

</beans>

Output: