Spring Boot Learning

To create stand alone spring project with minimal Spring configuration. It has Embeded Tomcat, Jetty or Undertow directly (no need to deploy WAR files)

spring-boot-projects

Topics

  1. Quickly develop Spring Boot App
  2. Rest API using Spring Boot
  3. Spring Mvc app with spring boot with thymeleaf
  4. CRUD development with spring boot

Spring Initializer

Spring Initializer
quickstart

Annotations:

@SpringBootApplication : For @Configuration,@EnableAutoConfiguration,@ComponentScan
If you want to scan other packages : @SpringBootApplication(ScanBasePackages = {"pkg.name",..}
@RestController
@Controller
SpringApplication class creates Application context and register all bean.

To create jar/war
mvn clean compile test
mvn package
To run
mvn spring-boot:run mycoolapp(or)
java >jar mycoolapp

Spring Boot Dependencies

spring-boot-dev-tools

To restart server automatically if any code changes occur.

spring-boot-starter-actuator

To monitor and manage applications and to check health,info of app metrics.

Endpoints:

/actuator/health exposed automatically
spring-boot-actuator endpoints.

spring-boot-starter-security

To enable security for endpoints. configure security
Auto generated password for development

spring-boot-starter-web

For spring mvc web app support

spring-boot-starter-data-jpa

It enables crud operations automatically based on entity and id type mentioning in JPARepository interface.

mysql-connector-java

mysql connector -> search for datasource in application.properties

spring-boot-starter-data-rest

It enables rest endpoints automatically based on entity name

spring-boot-starter-thymeleaf

Spring Boot Properties:

application-properties json visualizer for chrome