Spring boot: Autowire two beans of same class

Step 1: Define beans by providing some names to them.

@Configuration
public class EmployeeConfiguration {

	@Bean("krishna")
	public Employee newEmployee1() {
		System.out.println("New bean is getting initialized");
		Employee emp = new Employee();
		emp.setId(1);
		emp.setFirstName("Krishna");
		emp.setLastName("Majety");
		return emp;
	}
	
	@Bean("ram")
	public Employee newEmployee2() {
		System.out.println("New bean is getting initialized");
		Employee emp = new Employee();
		emp.setId(1);
		emp.setFirstName("Ram");
		emp.setLastName("Gurram");
		return emp;
	}
}

Step 2: Access specific beans via @Qualifier annotation.

@Autowired
@Qualifier("krishna")
private Employee emp1;

@Autowired
@Qualifier("ram")
private Employee emp2;

Find the below working example.

Employee.java

package com.sample.app.model;

public class Employee {

	private int id;
	private String firstName;
	private String lastName;

	public Employee() {
		System.out.println("Constructor Called");
	}

	public int getId() {
		return id;
	}

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

	public String getFirstName() {
		return firstName;
	}

	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public void print() {
		StringBuilder builder = new StringBuilder();
		builder.append("Employee [id=").append(id).append(", firstName=").append(firstName).append(", lastName=")
				.append(lastName).append("]");
		System.out.println(builder.toString());

	}

}

EmployeeConfiguration.java

package com.sample.app.configuration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.sample.app.model.Employee;

@Configuration
public class EmployeeConfiguration {

	@Bean("krishna")
	public Employee newEmployee1() {
		System.out.println("New bean is getting initialized");
		Employee emp = new Employee();
		emp.setId(1);
		emp.setFirstName("Krishna");
		emp.setLastName("Majety");
		return emp;
	}
	
	@Bean("ram")
	public Employee newEmployee2() {
		System.out.println("New bean is getting initialized");
		Employee emp = new Employee();
		emp.setId(1);
		emp.setFirstName("Ram");
		emp.setLastName("Gurram");
		return emp;
	}
}

application.properties

logging.level.root=WARN

App.java

package com.sample.app;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import com.sample.app.model.Employee;

@SpringBootApplication
public class App {

	@Autowired
	@Qualifier("krishna")
	private Employee emp1;

	@Autowired
	@Qualifier("ram")
	private Employee emp2;

	public static void main(String args[]) {
		System.out.println("Main Application running.......");
		SpringApplication.run(App.class, args);

		System.out.println("ApplicationContext initialized");

	}

	@Bean
	public CommandLineRunner demo() {
		return (args) -> {

			System.out.println("Inside command line runner");

			emp1.print();
			emp2.print();

		};
	}

}

Total project structure looks like below.

Run App.java, you can see below messages in console.

Main Application running.......

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.6.RELEASE)

New bean is getting initialized
Constructor Called
New bean is getting initialized
Constructor Called
Inside command line runner
Employee [id=1, firstName=Krishna, lastName=Majety]
Employee [id=1, firstName=Ram, lastName=Gurram]
ApplicationContext initialized

You can download complete working application from this link.

Previous                                                    Next                                                    Home