Java-ee REST server with IntelliJ and Tomcat

Question

I am trying to implement a REST server API using Java-ee after this . Instead of Glassfish, I use Tomcat.

I could create a servlet

@WebServlet(name = "hello", urlPatterns = "/")
public class HelloWorld extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("=)");
    }
}

And join http: // localhost: 9080 / I see a smiling face. But when I try to access the api path ( http: // localhost: 9080 / api / recommend / all ), I also get the face. If I delete the servlet class, I get 404 error. I suppose I need something else to automatically create the api, but I don't know what.

Can someone tell me what is missing? What should I do?

Update: In Intellij Java Enterprise View, I see:

Web > HelloWorld
RESTful WS > recommend > all

These are my api classes:

@ApplicationPath("/api")
public class REST_Config extends Application {
}

And specific method

@Path("recommend")
public class RecommenderController {

    @Path("/all")
    @GET
    @Produces("application/json")
    public JsonArray getAll(){
        JsonArrayBuilder builder = Json.createArrayBuilder();

        builder.add(Json.createObjectBuilder().add("1", "2.5"));

        return builder.build();
    }
}

And pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>TestREST</groupId>
    <artifactId>TestREST</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>TestREST</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
            </plugin>

        </plugins>
    </build>
</project>

Answer 1

" Glassfish Tomcat".

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-api</artifactId>
    <version>7.0</version>
</dependency>

, EE. . Java EE- . Tomcat EE. EE, , - . JAX-RS, Tomcat, , . .

, , - .

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet</artifactId>
    <version>2.17</version>
</dependency>

. Jersey. .

, JsonArray, , , , "No MessageBodyWriter JsonArray application type/json". . API Java EE JSONP,

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-processing</artifactId>
    <version>2.17</version>
</dependency>

JSON, , API . . , . POJO-JSON.

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>2.17</version>
</dependency>