java-ee Java RESTful Web Services (JAX-RS) GET method types
Example
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
@Path("/hello")
public class HelloWorldResource {
public static final String MESSAGE = "Hello World!";
@GET
@Produces("text/plain")
public String getHello() {
return MESSAGE;
}
@GET
@Path("/{letter}")
@Produces("text/plain")
public String getHelloLetter(@PathParam("letter") int letter){
if (letter >= 0 && letter < MESSAGE.length()) {
return MESSAGE.substring(letter, letter + 1);
} else {
return "";
}
}
}
GET without a parameter gives all content ("Hello World!") and GET with path parameter gives the specific letter out of that String.
Some examples:
$ curl http://localhost/hello Hello World!
$ curl http://localhost/hello/0 H
$ curl http://localhost/hello/4 o
Note: if you leave out the method-type annotation (e.g. the @GET above), a request method defaults to being a GET request handler.
