dependsOn attribute for loading the depended beans referenced by another bean. dependsOn is a attribute as part of the bean tag and it takes the comma separated bean names which are loaded before the actual bean is instantiated.

In this Example we can see when ApplicationContext Container can initialize first it can initialize Couse Bean because we can put depends-on attribute ansd give the dependency to the Student bean.

Student.java

package com.manish;

public class Student { private int id; private String name;

Student()
{
    System.out.println("Student Bean");
}
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;
}

}

Course.java

package com.manish;

public class Course {
private String name;

Course()
{
    System.out.println("Course Bean Creation : Initializing Course Details...");
}

public String getName() {
    return name;
}

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

}

App.java

package com.app;

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

import com.manish.Course; import com.manish.Student;

public class App {

/**
 * @param args
 */
public static void main(String[] args) {
    // TODO Auto-generated method stub

    ApplicationContext ctx=new ClassPathXmlApplicationContext(new String[]{"app-context.xml"});




}

}

app-context.xml

Output:--

Course Bean Creation : Initializing Course Details... Student Bean