SpringBoot Core Features, Pros & Cons, CLI, Maven Build, and Common Annotations

SpringBoot Core Features

1. Independent execution: SpringBoot applications can run as a standalone JAR using java -jar xx.jar. 2. Embedded servlet containers: It can embed Tomcat, Jetty, or Undertow, eliminating the need for WAR deployment. 3. Starters simplify Maven configuration: Adding a starter (e.g., spring-boot-starter-web) automatically pulls required dependencies. 4. Auto‑configuration: Based on classpath JARs, SpringBoot automatically configures beans, reducing manual setup; custom auto‑configuration is possible when needed. 5. Production‑grade monitoring: Provides HTTP, SSH, and Telnet endpoints for runtime monitoring. 6. No XML configuration required.

SpringBoot Advantages

• Rapid project creation • Seamless integration with mainstream frameworks without extra configuration • Standalone execution without external servlet containers • Built‑in runtime monitoring • Significantly improves development and deployment efficiency • Naturally integrates with cloud computing platforms

SpringBoot Disadvantages

• May not suit developers who dislike the Spring ecosystem • Certain features require deeper understanding (e.g., creating independent projects, embedded containers, starter POMs) • Provides many non‑functional features (security, metrics, health checks, external configuration) that may be unnecessary for simple apps • No code generation or XML configuration files.

SpringBoot CLI

The SpringBoot CLI is a command‑line tool that facilitates rapid development and testing of SpringBoot applications.

SpringBoot Maven Build

The spring-boot-starter-parent is a special starter that supplies common Maven dependency versions, allowing you to omit explicit <version> tags for frequently used libraries.

Common SpringBoot Annotations

1. @RestController / @Controller – designate a class as a web controller. 2. @RequestMapping – method‑level request mapping. 3. @EnableAutoConfiguration / @SpringBootApplication – enable class‑level auto‑configuration based on classpath dependencies. 4. @Configuration – marks a class that defines bean definitions. 5. @ComponentScan – scans for Spring components and registers them as beans. 6. @ImportResource – imports XML configuration when needed. 7. @Autowired – injects dependent beans automatically. 8. @Component – marks a generic component (e.g., custom filters).

Transaction Management

SpringBoot manages transactions via the @Transactional annotation; applying it at the method level creates method‑scoped transactions, while placing it on a class creates class‑wide transactions.