send a json array and receive it as a jaxb jersey parameter of type List

Question

Hello I am sorry if already asked but couldnt find.

Here is my problem, I do not know how many fields i will send to my webservice as they will be dynamic. As such i wanted to send a json array to my jersey jaxb ressource. as the objects in my json array will be a single dimensional array of strings i should be able to do the below:

  @POST
    @Path("/test")
    @Produces(MediaType.APPLICATION_JSON)
    public Response InputList(@QueryParam("list") final List<String> inputList)

Here is my json array { "list": [ "hello", "world" ] }

This does not seems to work....

Perception · Accepted Answer · 2013-07-01 06:06:48Z

3

What you have now doesn't work because your JSON doesn't represent a list of strings. It represents an object that has a single property which is a list of strings. To wit:

["hello", "world"]

Is a simple JSON data stream that can be deserialized directly into a List<String> in Java. Whereas:

{"list" : ["hello", "world"]}

Is a more complex data stream that needs to be deserialized into an object, for example one that looks like this:

public class ListHolder {
    private List<String> list;

    // constructors, getters/setters
}

You can then use this in your Jersey resource:

@POST
@Path("/test")
@Produces(MediaType.APPLICATION_JSON)
public Response InputList(@QueryParam("list") final ListHolder listHolder) {
    final List<String> list = listHolder.getList();
    // rest of code
}

answered Jul 1, 2013 at 6:06

Perception

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1 Comment

Perception Over a year ago

@Fongios - thats a totally separate question and should be posted as such.

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