Easiest frameworks to implement Java REST web services

Question

What are the best frameworks for implementing both client and server REST frameworks in Java? I've been struggling a little to find an easy to use solution.

Update: Both Jersey and Restlet seem like good options. We'll probably use Restlet but we'll experiment with both.

Answer 1

Jersey is really easy for both. To write web services, you use annotations:

@Path("/helloworld")
public class HelloWorldResource {

    // The Java method will process HTTP GET requests
    @GET
    // The Java method will produce content identified by the MIME Media
    // type "text/plain"
    @Produces("text/plain")
    public String helloWorld() {
        // Return some cliched textual content
        return "Hello World";
    }
}

For a client:

Client client = Client.create();
WebResource webResource = client.resource("http://localhost:8080/helloworld");
String s = webResource.get(String.class);
System.out.println(s); // prints Hello World