Spring Boot 核心注解分类与应用指南

Spring Boot 核心注解分类与应用指南

🏗️ 一、核心配置与组件管理

1. @SpringBootApplication

java
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

2. 分层注解

java
@Service
public class UserService {
// 业务逻辑实现
}

java
@Repository
public interface UserRepository extends JpaRepository<User, Long> {
// 数据访问方法
}

java
@RestController
@RequestMapping(“/api/users”)
public class UserController {
// REST端点定义
}

3. @Configuration & @Bean

java
@Configuration
public class AppConfig {
@Bean
public RestTemplate restTemplate()