How to POST a JSON object to a JAX-RS service

Question

I am using the Jersey implementation of JAX-RS. I would like to POST a JSON object to this service but I am getting an error code 415 Unsupported Media Type. What am I missing?

Here's my code:

@Path("/orders") @Consumes(MediaType.APPLICATION_JSON) @Produces(MediaType.APPLICATION_JSON) public class OrderResource {      private static Map<Integer, Order> orders = new HashMap<Integer, Order>();      @POST     public void createOrder(Order order) {          orders.put(order.id, order);     }      @GET     @Path("/{id}")     public Order getOrder(@PathParam("id") int id) {         Order order = orders.get(id);         if (order == null) {             order = new Order(0, "Buy", "Unknown", 0);         }         return order;     } } 

Here's the Order object:

public class Order {     public int id;     public String side;     public String symbol;     public int quantity;     ... } 

A GET request like this works perfectly and returns an order in JSON format:

GET http://localhost:8080/jaxrs-oms/rest/orders/123 HTTP/1.1 

However a POST request like this returns a 415:

POST http://localhost:8080/jaxrs-oms/rest/orders HTTP/1.1  {     "id": "123",     "symbol": "AAPL",     "side": "Buy",     "quantity": "1000" } 

Answer 1

The answer was surprisingly simple. I had to add a Content-Type header in the POST request with a value of application/json. Without this header Jersey did not know what to do with the request body (in spite of the @Consumes(MediaType.APPLICATION_JSON) annotation)!