How does Spring Boot auto-configuration work?
Answer:
Spring Boot uses the @EnableAutoConfiguration annotation (or indirectly via @SpringBootApplication) to configure beans based on the libraries on the classpath and properties defined in application.properties or application.yml.
The spring.factories file inside META-INF lists all the auto-configuration classes, which are conditionally applied using @ConditionalOnClass, @ConditionalOnProperty, etc.
Answer:
Spring Boot uses the @EnableAutoConfiguration annotation (or indirectly via @SpringBootApplication) to configure beans based on the libraries on the classpath and properties defined in application.properties or application.yml.
The spring.factories file inside META-INF lists all the auto-configuration classes, which are conditionally applied using @ConditionalOnClass, @ConditionalOnProperty, etc.
What is the difference between @Component, @Repository, and @Service?
Answer:
@Component: A generic stereotype annotation for any Spring-managed component.
@Repository: A specialization of @Component used to indicate a Data Access Object (DAO). Automatically translates database exceptions into Spring exceptions.
@Service: A specialization of @Component used to indicate a service layer bean. It is used to encapsulate business logic.
Answer:
@Component: A generic stereotype annotation for any Spring-managed component.
@Repository: A specialization of @Component used to indicate a Data Access Object (DAO). Automatically translates database exceptions into Spring exceptions.
@Service: A specialization of @Component used to indicate a service layer bean. It is used to encapsulate business logic.
How does Spring Boot handle exceptions in REST APIs?
Answer:
Use @ControllerAdvice to define a global exception handler.
Handle exceptions with @ExceptionHandler methods in the advice class.
Return meaningful HTTP status codes and error messages in the response body.
Answer:
Use @ControllerAdvice to define a global exception handler.
Handle exceptions with @ExceptionHandler methods in the advice class.
Return meaningful HTTP status codes and error messages in the response body.
What is the purpose of the @SpringBootApplication annotation?
Answer:
It is a combination of three annotations:
1. @SpringBootConfiguration: Similar to @Configuration.
2. @EnableAutoConfiguration: Enables Spring Boot's auto-configuration.
3. @ComponentScan: Scans the package where the application class resides.
Answer:
It is a combination of three annotations:
1. @SpringBootConfiguration: Similar to @Configuration.
2. @EnableAutoConfiguration: Enables Spring Boot's auto-configuration.
3. @ComponentScan: Scans the package where the application class resides.
What is the use of @Conditional annotations in Spring Boot?
Answer:
Spring Boot uses @Conditional annotations to enable conditional bean creation.
Examples:
@ConditionalOnClass: Bean is created only if a specific class is on the classpath.
@ConditionalOnProperty: Bean is created only if a specific property is defined in the configuration.
Answer:
Spring Boot uses @Conditional annotations to enable conditional bean creation.
Examples:
@ConditionalOnClass: Bean is created only if a specific class is on the classpath.
@ConditionalOnProperty: Bean is created only if a specific property is defined in the configuration.
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Spring Boot & Microservices Course | Hands-on Training with Live Project | Day 1
๐ Spring Boot & Microservices Live Training | Learn Hands-on with Real Projects ๐
๐ฅ Join our live sessions to master Spring Boot and Microservices with real-time hands-on projects! In this course, you will learn:
โ Spring Boot fundamentals & REST API developmentโฆ
๐ฅ Join our live sessions to master Spring Boot and Microservices with real-time hands-on projects! In this course, you will learn:
โ Spring Boot fundamentals & REST API developmentโฆ
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Day 2 - Spring Boot & Microservices Course | Hands-on Training with Live Project
๐ Spring Boot & Microservices Live Training | Learn Hands-on with Real Projects ๐
๐ฅ Join our live sessions to master Spring Boot and Microservices with real-time hands-on projects! In this course, you will learn:
โ Spring Boot fundamentals & REST API developmentโฆ
๐ฅ Join our live sessions to master Spring Boot and Microservices with real-time hands-on projects! In this course, you will learn:
โ Spring Boot fundamentals & REST API developmentโฆ
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Today's demo session will cover Spring Boot features, and the trainer will conduct a quiz on Spring Boot basics and its key features. Don't miss it! ๐
๐ฅ Spring Boot & Microservices
๐ฅ Real Time Java Project
๐จโโ๏ธ Trainer : Mr. Bhaskar
Day 3 : 20th Feb @ 9 OM IST
๐ Enroll Now for Meeting Details : https://bit.ly/4gyBoIV
๐ Join In WhatsApp : https://bit.ly/3Rbgvd1
Back Up Videos
Day 1 : https://youtu.be/TgPi69_iGRg
Day 2 : https://youtu.be/XEPQpuqBCAM
๐ฅ Spring Boot & Microservices
๐ฅ Real Time Java Project
๐จโโ๏ธ Trainer : Mr. Bhaskar
Day 3 : 20th Feb @ 9 OM IST
๐ Enroll Now for Meeting Details : https://bit.ly/4gyBoIV
๐ Join In WhatsApp : https://bit.ly/3Rbgvd1
Back Up Videos
Day 1 : https://youtu.be/TgPi69_iGRg
Day 2 : https://youtu.be/XEPQpuqBCAM
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Day 3 - Spring Boot & Microservices Course | Hands-on Training with Live Project
๐ Spring Boot & Microservices Live Training | Learn Hands-on with Real Projects ๐
๐ตDemo Sessions Backup Sessions
https://bit.ly/412pFNc
Enrollment Link (You can pay online)
https://www.javaexpressacademy.com/courses/Live-Sessions--Spring-Boot--Microservicesโฆ
๐ตDemo Sessions Backup Sessions
https://bit.ly/412pFNc
Enrollment Link (You can pay online)
https://www.javaexpressacademy.com/courses/Live-Sessions--Spring-Boot--Microservicesโฆ
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Answer:
Spring Boot Starters are pre-configured dependency packs that simplify project setup.
โข Example Starters:
โข spring-boot-starter-web โ For web applications
โข spring-boot-starter-data-jpa โ For JPA and Hibernate
โข spring-boot-starter-security โ For Spring Security
Example (Maven Dependency for Spring Boot Web Starter):
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Answer:
Spring Boot Actuator provides monitoring and management features for applications.
โข It exposes endpoints like:
โข /actuator/health โ Checks application health
โข /actuator/metrics โ Shows performance metrics
โข /actuator/env โ Displays environment properties
Enable Actuator in application.properties:
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Answer:
Spring Boot includes embedded servers like Tomcat, Jetty, and Undertow, eliminating the need for external deployment.
โข By default, Spring Boot uses Tomcat (spring-boot-starter-web).
โข You can switch to Jetty:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
<scope>provided</scope>
</dependency>โข Server configuration can be customized in application.properties:
server.port=8081
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Answer:
Spring Boot uses Logback by default but supports SLF4J, Log4j2, and Java Util Logging.
Customize Logging in application.properties:
logging.level.org.springframework=DEBUG
logging.level.com.myapp=INFO
logging.file.name=app.log
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Java 8 Coding Challenge: Can You Find the 2nd Largest Number?
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Java 8 Coding Challenge: Can You Find the 2nd Largest Number?
๐ท Java 8 Coding Challenge: Can You Find the 2nd Largest Number? ๐ท
๐ Are you ready for a Java 8 coding challenge? In this video, we'll solve a commonly asked interview question:
How do you find the second largest number in a list using Java 8 Streams?
๐โฆ
๐ Are you ready for a Java 8 coding challenge? In this video, we'll solve a commonly asked interview question:
How do you find the second largest number in a list using Java 8 Streams?
๐โฆ
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Find the First Non Repeated Character in a String Using Java 8
๐ท Java 8 Coding Challenge: Find the First Non-Repeated Character in a String! ๐ท
๐ Are you preparing for Java interviews or coding assessments?
๐ In this video, youโll learn how to find the first non-repeating character in a string using Java 8 Streams &โฆ
๐ Are you preparing for Java interviews or coding assessments?
๐ In this video, youโll learn how to find the first non-repeating character in a string using Java 8 Streams &โฆ