Request to Spring Controller returns 404 not found

I am trying to set up a Spring MVC app but every time I call the http://localhost:9001/tasks API from postman I get the following error:

Here is my code:

@SpringBootApplication(exclude = {SecurityAutoConfiguration.class})
public class TaskManagerApplication {

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


@Bean
public WebMvcConfigurer corsConfigurer() {
	return new WebMvcConfigurerAdapter() {
		@Override
		public void addCorsMappings(CorsRegistry registry) {
			registry.addMapping("/**").allowedOrigins("http://localhost:4200");
		}
	};
}
}

TaskRepository:

@Path("tasks")
@ApiIgnore
@Component
@AllArgsConstructor
public class TaskResource {

private final TaskService taskService;

@GET
@Produces(APPLICATION_JSON)
public List<Task> getAllTasks() {
    return taskService.getTasks();
}

TaskService:

@Service
@RequiredArgsConstructor
public class TaskService {

private final TaskRepository taskRepository;

public List<Task> getTasks() {
    return taskRepository.findAll();
}

Project Structure:

You are using JAX-RS in spring boot. Spring handles rest in its own way, if you want to use JAX-RS instead of Springs Rest Annotations, you need to do some extra configurations.

First, you need to add a JAX-RS dependency in your build.gradle or pom.xml file. I guess you have already done that. Jersey is one of the JAX-RS implementation, if you want to add this, you need to do the following.
build.gradle

implementation "org.springframework.boot:spring-boot-starter-jersey"

pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jersey</artifactId>
</dependency>

After that, you need to register the JAX-RS endpoints with Spring. I guess you missed this step.

import org.glassfish.jersey.server.ResourceConfig;
import org.springframework.context.annotation.Configuration;

@Configuration
public class JaxrsConfig extends ResourceConfig {

    public JaxrsConfig() {
        register(TaskResource.class);
    }
}

After this, your JAX-RS endpoints will be registered with spring.

But I will suggest you to follow spring annotations if you are using spring. If you use spring annotations your code will look like this.

@RestController
@RequestMapping(path = "tasks")
public class TaskResource {

    @GetMapping(path = "", produces = MediaType.APPLICATION_JSON_VALUE)
    public List<String> getAllTasks() {
        return Arrays.asList("a","b");
    }
}

Also you will need to remove JAX-RS from spring to use this Spring MVC annoatations to work.