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Spring - Using @ComponentScan to scan non component classes via includeFilters attribute

[Last Updated: Jun 11, 2021]

@ComponentScan#includeFilters can be used to scan classes which are not annotated with @Component and other stereotype annotation. It can be done by specifying a Filter with type as FilterType#ASSIGNABLE_TYPE and classes as non component classes to be scanned. For example:

@ComponentScan(includeFilters = @ComponentScan.Filter(
        type = FilterType.ASSIGNABLE_TYPE, classes = {OrderService.class}))

Example

A non component class

package com.logicbig.example;

public class OrderService {

  public void placeOrder(String item) {
      System.out.printf("Retail order placed. Item: %s%n", item);
  }
}

A component class

package com.logicbig.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class Buyer {
  @Autowired
  private OrderService orderService;

  public void buySomething() {
      orderService.placeOrder("Laptop");
  }
}

Main class

package com.logicbig.example;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;

@Configuration
@ComponentScan(includeFilters = @ComponentScan.Filter(
      type = FilterType.ASSIGNABLE_TYPE, classes = {OrderService.class}))
public class OnlineOrderApp {

  public static void main(String... strings) {
      AnnotationConfigApplicationContext context =
              new AnnotationConfigApplicationContext(OnlineOrderApp.class);
      System.out.println("-- Spring container started and is ready --");
      Buyer buyer = context.getBean(Buyer.class);
      buyer.buySomething();
  }
}

Output

-- Spring container started and is ready --
Retail order placed. Item: Laptop

Example Project

Dependencies and Technologies Used:

  • spring-context 5.3.8: Spring Context. Version Compatibility: 4.2.0.RELEASE - 5.3.8 Version List
    ×

    Version compatibilities of spring-context with this example:

    • 4.2.0.RELEASE
    • 4.2.1.RELEASE
    • 4.2.2.RELEASE
    • 4.2.3.RELEASE
    • 4.2.4.RELEASE
    • 4.2.5.RELEASE
    • 4.2.6.RELEASE
    • 4.2.7.RELEASE
    • 4.2.8.RELEASE
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    • 4.3.5.RELEASE
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    • 4.3.10.RELEASE
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    • 4.3.14.RELEASE
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    • 4.3.18.RELEASE
    • 4.3.19.RELEASE
    • 4.3.20.RELEASE
    • 4.3.21.RELEASE
    • 4.3.22.RELEASE
    • 4.3.23.RELEASE
    • 4.3.24.RELEASE
    • 4.3.25.RELEASE
    • 4.3.26.RELEASE
    • 4.3.27.RELEASE
    • 4.3.28.RELEASE
    • 4.3.29.RELEASE
    • 4.3.30.RELEASE
    • 5.0.0.RELEASE
    • 5.0.1.RELEASE
    • 5.0.2.RELEASE
    • 5.0.3.RELEASE
    • 5.0.4.RELEASE
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    • 5.0.8.RELEASE
    • 5.0.9.RELEASE
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    • 5.1.16.RELEASE
    • 5.1.17.RELEASE
    • 5.1.18.RELEASE
    • 5.1.19.RELEASE
    • 5.1.20.RELEASE
    • 5.2.0.RELEASE
    • 5.2.1.RELEASE
    • 5.2.2.RELEASE
    • 5.2.3.RELEASE
    • 5.2.4.RELEASE
    • 5.2.5.RELEASE
    • 5.2.6.RELEASE
    • 5.2.7.RELEASE
    • 5.2.8.RELEASE
    • 5.2.9.RELEASE
    • 5.2.10.RELEASE
    • 5.2.11.RELEASE
    • 5.2.12.RELEASE
    • 5.2.13.RELEASE
    • 5.2.14.RELEASE
    • 5.2.15.RELEASE
    • 5.3.0
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    • 5.3.3
    • 5.3.4
    • 5.3.5
    • 5.3.6
    • 5.3.7
    • 5.3.8

    Versions in green have been tested.

  • JDK 8
  • Maven 3.8.1

@ComponentScan#includeFilters example Select All Download
  • spring-component-scan-including-non-component-classes
    • src
      • main
        • java
          • com
            • logicbig
              • example
                • OnlineOrderApp.java

    See Also