Day – 1
1.Introduction to Spring Boot

2.Setting Up Spring Boot and Creating a Basic Program

If you need the sample Spring Boot application code as text:

java

1. // Sample Spring Boot Application
2.  
3. @SpringBootApplication
4. public class DemoApplication {
5.     public static void main(String[] args) {
6.         SpringApplication.run(DemoApplication.class, args);
7.     }

}

Day – 2

1. Spring Boot Starters and Auto-Configuration
2. Understanding and Customizing Auto-Configuration

text

// Sample application.properties

spring.datasource.url=jdbc:h2:mem:testdb

spring.jpa.hibernate.ddl-auto=update

Day – 3

1. Spring Boot Actuator
2. Monitoring and Managing Endpoints
3. Customizing Actuator Endpoints

text

// Sample Actuator Configuration

management.endpoints.web.exposure.include=health

Day – 4

1. Spring Data JPA
2. Creating Entities, Repositories, and Services
3. Query Methods and Custom Queries

java

// Sample JPA Entity

@Entity

public class User {

    @Id

    @GeneratedValue(strategy = GenerationType.IDENTITY)

    private Long id;

    private String name;

    // getters and setters

}

Day – 5

1. Spring Boot Security
2. Implementing Basic Authentication and Authorization
3. Configuring Security with JWT Tokens

java

// Sample Security Configuration

@Configuration

@EnableWebSecurity

public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override

    protected void configure(HttpSecurity http) throws Exception {

        http

            .csrf().disable()

            .authorizeRequests()

            .antMatchers(“/public/**”).permitAll()

            .anyRequest().authenticated();

    }

}
Day – 6

1. Building REST APIs with Spring Boot
2. Handling Requests and Responses
3. Exception Handling and Validation

java

// Sample REST Controller

@RestController

@RequestMapping(“/api/users”)

public class UserController {

    @GetMapping

    public List getAllUsers() {

        // return list of users

    }

    @PostMapping

    public User createUser(@RequestBody User user) {

        // create and return user

    }

}
Day – 7

1. Spring Boot with Docker
2. Creating and Configuring Dockerfile
3. Building and Running Docker Containers

text

# Sample Dockerfile

FROM openjdk:11-jre-slim

COPY target/demo-0.0.1-SNAPSHOT.jar app.jar

ENTRYPOINT [“java”, “-jar”, “/app.jar”]

Day – 8

1. Introduction to Spring Cloud
2. Configuring Spring Cloud Config Server and Clients
3. Service Discovery with Eureka

java

// Sample Eureka Server Configuration

@SpringBootApplication

@EnableEurekaServer

public class EurekaServerApplication {

    public static void main(String[] args) {
Day – 9

1. Spring Boot Microservices
2. Building and Integrating Microservices
3. Inter-service Communication with REST

java

// Sample Microservice Configuration

@SpringBootApplication

@EnableDiscoveryClient

public class MicroserviceApplication {

    public static void main(String[] args) {

        SpringApplication.run(MicroserviceApplication.class, args);

    }

}

        SpringApplication.run(EurekaServerApplication.class, args);

    }

}

Day – 10

1. Advanced Topics in Spring Boot
2. Asynchronous Processing with @Async
3. Scheduled Tasks with @Scheduled

java

// Sample Asynchronous Method

@Service

public class MyService {

    @Async

    public CompletableFuture AsyncMethod() {

        return CompletableFuture.completedFuture(“Async Result”);

    }

}

Day – 11

1. Deployment of Spring Boot Applications
2. Using Kubernetes for Orchestration
3. CI/CD Integration with Jenkins

text

# Sample Kubernetes Deployment YAML

apiVersion: apps/v1

kind: Deployment

metadata:

  name: spring-boot-app

spec:

  replicas: 2

  selector:

    matchLabels:

      app: spring-boot-app

  template:

    metadata:

      labels:

        app: spring-boot-app

    spec:

      containers:

        – name: spring-boot-app

          image: spring-boot-app:latest

          ports:

            – containerPort: 8080