CODEWITHSUNDEEP
javajax-rsjersey-2.0jersey-client
user3718908x100
user3718908x100

Reputation: 8519

Jersey Client Posting Form Data

I'm learning about JAX-RS and Jersey. I am trying to post data to a URL however I have an issue I do not know to fix:

Form formData = new Form();
formData.param("merchant_id", mPayment.getMerchantId());
formData.param("transaction_id", mPayment.getTransactionId());
formData.param("code", mPayment.getCode());
formData.param("amount", String.valueOf(mPayment.getAmount()));
formData.param("desc", mPayment.getDesc());
formData.param("phone", mPayment.getPhone());

Response response = target.path("process").request()
        .accept(MediaType.APPLICATION_JSON)
        .post(Entity.form(formData));

Now everything works well when it's just a string however the server is expecting a float data type for the field amount however when I try to use it without String.valueOf() I get an error. How do I add params with different data types so I can post?

Upvotes: 2

Views: 8440

Answers (1)

Kostas Stamos
Kostas Stamos

Reputation: 173

You cannot maintain the type information across the call to the server. The form data will be transferred as text with the application/x-www-form-urlencoded content type header, this is why the Form class accepts String parameter values (similarly to how you could only enter text values in a browser form).

So your code should be sufficient. At the server side, you can declare the parameter as a float and annotate it with javax.ws.rs.FormParam. If the parameter cannot be cast to the desired (float) type by the Jersey runtime, it will return a 400 BAD REQUEST.

In a nutshell:

  • Keep client code as it is.

  • Use server code similar to:

    import javax.ws.rs.FormParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

@Path("/service")
public class myService {

    @POST
    public Response addOrder(
        @FormParam("merchant_id") String merchant_id,
        @FormParam("amount") float amount
        // more parameters 
        ) {

        return Response.ok().build();
    }
}

Upvotes: 1

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