bin/standalone.sh http://localhost:9990 package com.example; import javax.ejb.Stateless; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; @Stateless @Path("/hello") public class HelloWorld { @GET @Produces(MediaType.TEXT_PLAIN) public String sayHello() { return "Hello, World!"; } }