connect to 127.0.0.1 port 8080 failed: Connection refused

Question

I created a simple RestController, using Spring (not Boot).

@RestController
@RequestMapping(UserRestController.REST_URL)
public class UserRestController extends AbstractUserController {

    static final String REST_URL = "/users";

    @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
    public User get(int id) {
      return super.get(id);
  }
}

But when I invoke this method and use curl I receive:

$ curl -v http://localhost:8080/users
Trying 127.0.0.1...
TCP_NODELAY set
connect to 127.0.0.1 port 8080 failed: Connection refused
Failed to connect to localhost port 8080: Connection refused

Additionally: I push MocMvc-test and it failed with following result:

java.lang.AssertionError: Status expected:<200> but was:<404>
  Expected :200
  Actual   :404

I run my app with:

public static void main(String[] args) {

try (ConfigurableApplicationContext appCtx = new 
ClassPathXmlApplicationContext("spring/spring-app.xml")) {
 System.out.println("Bean definition names: " + 
  Arrays.toString(appCtx.getBeanDefinitionNames()));
UserRestController userRestController = 
  appCtx.getBean(UserRestController.class);
        System.out.println(userRestController.get(2));
    }
}

In the console I see the output of System.out.println(userRestController.get(2)); So my CRUD-methods works good.

Does this answer your question? [Curl : connection refused](https://stackoverflow.com/questions/41027340/curl-connection-refused) — Amongalen, Feb 07 '20 at 11:14
Did you start your Spring program? It should have printed the port that it is listening to. Show us the output of that (still running) program. — Andreas, Feb 07 '20 at 11:19
Amongalen. I tried this advice (netstat -ln | grep 8080) and see, that no app listening port 8080. — Jelly, Feb 07 '20 at 12:06
Andreas. Does it mean, that I should to start spring with command line? — Jelly, Feb 07 '20 at 12:10
Is the server running? I'm 99% sure that the server is not running. — Junius L, Feb 07 '20 at 14:33

JuanMoreno · Accepted Answer · 2020-02-08T22:34:16.590

In order to attend an HTTP request with Spring without using Spring Boot, you need typically the following:

Use spring-webmvc dependency. I understood that you already have.
Package your application as a war. If you build with maven, you need to add the <packaging>war</packaging> sentence in your pom.xml
In your web.xml declare the org.springframework.web.servlet.DispatcherServlet. You can also use the org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer to register it.
Define the mappings and configuration in your application-context file or class if you use java-config.
Deploy your war file in a Servlet container like Tomcat or Jetty.

I put an example with Spring 5 here.

You can found another example with Spring 4 here.

I forgot a Dispatcher-servlet in web.xml! – Jelly Feb 07 '20 at 21:04 — Jelly, Feb 07 '20 at 21:04

connect to 127.0.0.1 port 8080 failed: Connection refused

1 Answers1