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How to filter components in auto scanning?

In the previous example you have seen how to enable auto component scanning. This page shows an example to include and exclude components based on your requirements.

You can filter your components during enabling auto component scanning level, it should be configured at xml based configuration level. Here is an example for including auto scan components:

package com.java2novice.dao;

import org.springframework.stereotype.Component;

public class InventoryDao {
	public void printInventoryDaoStatus(){
		System.out.println("Inside InventoryDao & status method");

package com.java2novice.service;

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

import com.java2novice.dao.InventoryDao;

public class J2nInventoryService {

	private InventoryDao inventoryDao;
	public void testInventoryServce(){
		System.out.println("Inside service class, testInventoryServce()");

Here is the xml based configuration, which includes a filter to include components, the filter is specified using "include-filter" tag. Note that below filtering components based on regular expression, and annotation based. Below xml configuration including all Components annotated with @Component annotation and any class containing "Service" String.

<beans xmlns=""

    <context:component-scan base-package="com.java2novice">
        <context:include-filter type="regex" 
			expression="com.java2novice.service.*Service.*" />	
		<context:include-filter type="annotation" 
			expression="org.springframework.stereotype.Component" />	

Spring bean demo class:

package com.java2novice.test;

import org.springframework.context.ConfigurableApplicationContext;

import com.java2novice.service.J2nInventoryService;

public class SpringDemo {

	public static void main(String a[]){
		String confFile = "applicationContext.xml";
		ConfigurableApplicationContext context 
						= new ClassPathXmlApplicationContext(confFile);
		J2nInventoryService inventoryService 
						= (J2nInventoryService) context.getBean("j2nInventoryService");

Inside service class, testInventoryServce()
Inside InventoryDao & status method

Now we will see example for how to exclude few components from auto scanning. In the below xml based configuration file, we are excluding few components by using "exclude-filter" tag type.

<beans xmlns=""

    <context:component-scan base-package="com.java2novice">
        <context:exclude-filter type="regex" 
			expression="com.java2novice.service.*Service.*" />	
		<context:exclude-filter type="annotation" 
			expression="org.springframework.stereotype.Component" />	

Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: 
										No bean named 'j2nInventoryService' is defined
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  30. How to inject Set into spring bean?
  31. How to inject Map into spring bean?
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  33. Difference between @Component, @Service, @Repository and @Controller
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Knowledge Centre
Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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