JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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My Spring boot application is not scaning my components (controllers)


Many Spring Boot developers have annotated their spring boot application class with @SpringBootApplication annotation. But we noticed that sometimes it failed to scan components. We might have added @ComponentScan annotation too. But we see still the component scan is not happening. What is the reason?

In fact, The @SpringBootApplication annotation is equivalent to using @Configuration, @EnableAutoConfiguration and @ComponentScan with their default attributes.

If we get into these kind of situations, just remember that the component scan default behaviour happens only in the same package and in its sub package. If your controllers or components are in different, dont forget to override your component scan default configurations. Here is the sample code on how to override the default behavour.

@SpringBootApplication(scanBasePackages = "com.java2novice")

Or you can specify multiple packages as shown below:

@SpringBootApplication(scanBasePackages = {"com.java2novice", "com.simplebro"})

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Knowledge Centre
What is transient variable?
Transient variables cannot be serialized. During serialization process, transient variable states will not be serialized. State of the value will be always defaulted after deserialization.
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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] or you can comment on the page.

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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