Breaking News: Grepper is joining You.com. Read the official announcement!

What is a component scan?

Pragya Keshap answered on March 1, 2023 Popularity 5/10 Helpfulness 2/10

answer What is a component scan?

What is a component scan?

Comment

Using component scan is one method of asking Spring to detect Spring managed components. Spring needs the information to locate and register all the Spring components with the application context when the application starts. Spring can auto scan, detect, and instantiate components from pre-defined project packages.

@Configuration
@ComponentScan(basePackages = {"guru.springframework.blog.componentscan.example.demopackageA",
        "guru.springframework.blog.componentscan.example.demopackageD",
        "guru.springframework.blog.componentscan.example.demopackageE"},
        basePackageClasses = DemoBeanB1.class)
public class BlogPostsApplicationWithComponentScan {
    public static void main(String[] args) {
        ApplicationContext context = SpringApplication.
                run(BlogPostsApplicationWithComponentScan.class,args);
        System.out.println("Contains A  "+context.
                containsBeanDefinition("demoBeanA"));
        System.out.println("Contains B2  " + context.
                containsBeanDefinition("demoBeanB2"));
        System.out.println("Contains C   " + context.
                containsBeanDefinition("demoBeanC"));
        System.out.println("Contains D   " + context.
                containsBeanDefinition("demoBeanD"));
    }
}

Popularity 5/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: java

Link to this answer
Share Copy Link

Contributed on Mar 01 2023

Pragya Keshap

0 Answers Avg Quality 2/10

What is a component scan?

Contents

More Related Answers

What is a component scan?

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.