How to get full REST request body using Jersey?

Turns out you don't have to do much at all.

See below - the parameter x will contain the full HTTP body (which is XML in our case).

@POST
public Response go(String x) throws IOException {
    ...
}

You could use the @Consumes annotation to get the full body:

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;

@Path("doc")
public class BodyResource
{
  @POST
  @Consumes(MediaType.APPLICATION_XML)
  public void post(Document doc) throws TransformerConfigurationException, TransformerException
  {
    Transformer tf = TransformerFactory.newInstance().newTransformer();
    tf.transform(new DOMSource(doc), new StreamResult(System.out));
  }
}

Note: Don't forget the "Content-Type: application/xml" header by the request.