如何使用Java使用此Web服务？

Question

this is a very simple question apparently but i was unavaible to find a certain information searching in google. Let me tell you, i have a jboss running in my computer with only this webservice:

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.springframework.stereotype.Controller;

@Controller
@Path("/services/test")
public class TestController 
{
    @POST
    @Path("/reg")
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces({ MediaType.APPLICATION_JSON })
    public Response checkMock(String paramx)
    {
        return Response.ok("Paramx: " + paramx,MediaType.APPLICATION_JSON).build();
    }

}

Ok, to test it i use "Advance REST Client" chrome plugin and it is very simple, look this picture:

Well the question is, how can i do the same but with some java code in another program? What objecto do i require?

Best regards!

Answer 1

Use Spring RestTemplate to consume a Rest service.

You need to first register the RestTesmplate into spring context

<bean class="org.springframework.web.client.RestTemplate" id="restTemplate">
   <constructor-arg>               
        <bean class="org.springframework.http.client.HttpComponentsClientHttpRequestFactory"/> 
    </constructor-arg>
 </bean> 

Once you registered your resttemplete in spring context you can inject that in your service class and call the exchange method

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<?> httpEntity = new HttpEntity<Object>(payLoad, headers);

ResponseEntity<ResponseObject> response = restTemplate.exchange(ENDPOINT, HttpMethod.POST, httpEntity, ResponseObject.class);
ResponseObject resObj =  response.getBody();

Here payLoad is your request object and ResponseObject

To unmarshall the response directly into to response object you need to register the message converters

List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setClassesToBeBound(ResponseObject.class);
MarshallingHttpMessageConverter marshallingHttpMessageConverter = new MarshallingHttpMessageConverter(marshaller, marshaller);
marshallingHttpMessageConverter.setSupportedMediaTypes(Arrays.asList(MediaType.APPLICATION_JSON, MediaType.TEXT_HTML));
messageConverters.add(marshallingHttpMessageConverter);
restTemplate.setMessageConverters(messageConverters);