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Programmes

1. Program: Implement a simple Spring bean configuration.

				
					import org.springframework.context.annotation.Bean;
import org.springframework.context
.annotation.Configuration;

@Configuration
public class AppConfig {

    @Bean
    public HelloWorld helloWorld() {
        return new HelloWorld();
    }
}

				
			

2. Program: Create a Spring bean with a dependency injected through constructor.

				
					public class Employee {
    private final String name;

    public Employee(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }
}

				
			

3. Program: Define a Spring bean with a dependency injected through setter.

				
					public class Address {
    private String city;

    public void setCity(String city) {
        this.city = city;
    }

    public String getCity() {
        return city;
    }
}

				
			
				
					import org.springframework.context
.annotation.Bean;
import org.springframework.context
.annotation.Configuration;

@Configuration
public class AppConfig {

    @Bean
    public Address address() {
        Address address = new Address();
        address.setCity("New York");
        return address;
    }
}

				
			

4. Program: Implement a simple Spring MVC controller.

				
					import org.springframework.stereotype.Controller;
import org.springframework.web.bind
.annotation.RequestMapping;
import org.springframework.web.bind
.annotation.ResponseBody;

@Controller
public class HelloWorldController {

    @RequestMapping("/")
    @ResponseBody
    public String helloWorld() {
        return "Hello, World!";
    }
}

				
			

5. Program: Configure a simple RESTful web service in Spring.

				
					import org.springframework.boot.SpringApplication;
import org.springframework.boot
.autoconfigure.SpringBootApplication;
import org.springframework.web.bind
.annotation.GetMapping;
import org.springframework.web.bind
.annotation.RestController;

@SpringBootApplication
@RestController
public class Application {

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

    @GetMapping("/hello")
    public String hello() {
        return "Hello, World!";
    }
}

				
			

6. Program: Implement a basic Aspect-Oriented Programming (AOP) aspect.

				
					import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LoggingAspect {

    @Before("execution(* com.example.*.*(..))")
    public void beforeSampleCreation() {
        System.out.println
        ("Logging before the method execution");
    }
}

				
			

7. Program: Configure Spring Security for a simple web application.

				
					import org.springframework.context
.annotation.Configuration;
import org.springframework.security.config
.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web
.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends 
WebSecurityConfigurerAdapter {

    // Add security configurations here
}

				
			

8. Program: Implement a simple Spring Boot application.

				
					import org.springframework.boot
.SpringApplication;
import org.springframework.boot
.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

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

				
			

9. Program: Configure database access using Spring Data JPA.

				
					import org.springframework.data.jpa.repository
.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends
JpaRepository<User, Long> {

    // Add custom query methods here
}

				
			

10. Program: Implement a basic Spring Boot Actuator for monitoring the application.

				
					import org.springframework.boot
.SpringApplication;
import org.springframework.boot.actuate.autoconfigure
.endpoint.web.WebEndpointProperties;
import org.springframework.boot
.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure
.security.servlet.SecurityAutoConfiguration;
import org.springframework.context.annotation.Bean;

@SpringBootApplication(exclude 
= SecurityAutoConfiguration.class)
public class Application {

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

    @Bean
    public WebEndpointProperties 
    webEndpointProperties() {
        return new WebEndpointProperties();
    }
}