Setter Injection
Spring Inversion of Control (IoC ) also known as
Dependency Injection (DI ) is a process by which
objects define their dependencies with collaborating objects.
Setter-based dependency injection allows us to inject dependencies
through setter methods. Spring container initializes the bean
by invoking appropriate setter methods with user provided dependencies.
package com.bethecoder.tutorials.spring3.basic; public class Employee { private int id; private String name; private double salary; public Employee () { super () ; this .id = - 1 ; this .name = "Unknown" ; this .salary = 0 ; } public Employee ( int id, String name ) { super () ; this .id = id; this .name = name; this .salary = 20000 ; } public Employee ( int id, String name, double salary ) { super () ; this .id = id; this .name = name; this .salary = salary; } 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 double getSalary () { return salary; } public void setSalary ( double salary ) { this .salary = salary; } public String toString () { return "Employee[" + id + ", " + name + ", " + salary + "]" ; } }
package com.bethecoder.tutorials.spring3.tests.setter; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.core.io.ClassPathResource; import com.bethecoder.tutorials.spring3.basic.Employee; public class SetterInjection { /** * @param args */ public static void main ( String [] args ) { XmlBeanFactory factory = new XmlBeanFactory ( new ClassPathResource ( "setter_inj.xml" )) ; Employee emp1 = ( Employee ) factory.getBean ( "emp1" ) ; System.out.println ( emp1 ) ; Employee emp2 = ( Employee ) factory.getBean ( "emp2" ) ; System.out.println ( emp2 ) ; } }
Employee[1, ABC, 90000.0]
Employee[2, XYZ, 9999.99]
