Spring Boot – Controller is recognised but the api is not binded

I have two files in my application.

The Main class file.

package in.njari.util;

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

@SpringBootApplication
public class UtilApplication {

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

}

The controller class.

package in.njari.util.controller;

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UtilController {
    @GetMapping("/util")
    public ResponseEntity<?> f(){
        return new ResponseEntity<>("I provide insights.", HttpStatus.OK);
    }
}

My application.properties looks like :

server.servlet.context-path=/util-service
logging.level.org.springframework.core.io.support=DEBUG
logging.level.org.springframework.context.annotation=DEBUG

Here’s what my console looks like :

 /\ / ___'_ __ _ _(_)_ __  __ _    
( ( )___ | '_ | '_| | '_ / _` |    
 \/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |___, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.5.RELEASE)

2022-04-06 11:19:53.819  INFO 57700 --- [           main] in.njari.util.UtilApplication            : Starting UtilApplication on njari-MacBook-Pro.local with PID 57700 (/Users/rajdeep/X/util/target/classes started by rajdeep in /Users/rajdeep/X/util)
2022-04-06 11:19:53.821  INFO 57700 --- [           main] in.njari.util.UtilApplication            : No active profile set, falling back to default profiles: default
2022-04-06 11:19:54.005 DEBUG 57700 --- [           main] o.s.c.a.ClassPathBeanDefinitionScanner   : Identified candidate component class: file [/Users/njari/X/util/target/classes/in/njari/util/src/controller/UtilController.class]
2022-04-06 11:19:54.615  INFO 57700 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-04-06 11:19:54.627  INFO 57700 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-04-06 11:19:54.627  INFO 57700 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.31]
2022-04-06 11:19:54.708  INFO 57700 --- [           main] o.a.c.c.C.[.[localhost].[/util-service]  : Initializing Spring embedded WebApplicationContext
2022-04-06 11:19:54.709  INFO 57700 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 830 ms
2022-04-06 11:19:54.861  INFO 57700 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '/util-service'
2022-04-06 11:19:54.866  INFO 57700 --- [           main] in.njari.util.UtilApplication            : Started UtilApplication in 6.463 seconds (JVM running for 6.993)

I tried hitting the api with the url : http://localhost:8080/util-service/util and this throws up a 404 error.

So even though the controller is picked up for component scanning(according to the logs), the request within it isn’t mapped. Not sure why this is happening.

I suspect there is something wrong with the way i’m configuring my request here! Haven’t been able to pinpoint what it really is though.

Answer

If you explicitly want to scan base packages, use

@SpringBootApplication(scanBasePackages = "in.njari")

Edit: Updating answer w.r.t. your code
Change spring-web dependency to

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

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Answer