Spring DI with Object Using Setter Injection

We will see below how to inject dependency object through the Setter Injection.

package com.bk.spring.test;

public class StudentBean {

    private int id;
    private String name;
    private String emailId;
    private CourseBean courseBean;

    public int getId() {
        return id;
    }


    public void setId(int id) {
        this.id = id;
    }


    public String getName() {
        return name;
    }


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


    public String getEmailId() {
        return emailId;
    }


    public void setEmailId(String emailId) {
        this.emailId = emailId;
    }


    public CourseBean getCourseBean() {
        return courseBean;
    }


    public void setCourseBean(CourseBean courseBean) {
        this.courseBean = courseBean;
    }


    public void getStudentDetails() {
        System.out.println("Id is " + this.id + " \n name is " + name
                + " \n email id is " + emailId +  "\n" + courseBean.getCourseDetails());
    }

}

package com.bk.spring.test;

public class CourseBean {

    private String name;
    private String duration;
    private Double fee;

    public String getName() {
        return name;
    }

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

    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    public Double getFee() {
        return fee;
    }

    public void setFee(Double fee) {
        this.fee = fee;
    }
       
    public String getCourseDetails(){
        return "Course " + name + " has " + duration + " duration with fee " + fee;
    }

}

<?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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <bean name="student" class="com.bk.spring.test.StudentBean">
        <property name="id" value="1"></property>
        <property name="name" value="Krishna"></property>
        <property name="emailId" value="Krishna@abc.com"></property>
        <property name="courseBean" ref="courseBean"></property>
    </bean>
    <bean name="courseBean" class="com.bk.spring.test.CourseBean">
        <property name="name" value="Java"></property>
        <property name="duration" value="90Days"></property>
        <property name="fee" value="2018"></property>
       </bean>
   </beans>


package com.bk.spring.test;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

public class SpringConDITest {

    public static void main(String a[]) {

        Resource res = new ClassPathResource("applicationContext.xml");
        BeanFactory factory = new XmlBeanFactory(res);
        StudentBean bean = (StudentBean) factory.getBean("student");
        bean.getStudentDetails();
       
    }

}
Output:

Id is 1
 name is Krishna
 email id is Krishna@abc.com
Course Java has 90Days duration with fee 2018.0