Agfdhyk

I want to get this json from class User:

{

    "id" : "1234",

    "campaignId" : {

        "campaignId" : "whatever"

    }

}

This is the class:

class User {



    private String id;

    private String campaignId;



    public String getId() {

        return id;

    }



    public String getCampaignId() {

        return "{ "campaignId" : ""+ campaignId +"" }";

    }



}

But I have a wrong json:

{

    "id" : "1234",

    "campaignId" : "{

        "campaignId" : "whatever"

    }"

}

As you see, first level campaignId is a string instead of an object containing a campaignId key.

How can I achieve that without creating another POJO?

I want to get this json from class User: ...

"campaignId" : {
"campaignId" : "whatever"

...

private String campaignId;

Those things simply don't go together.

If your requirement is that campaignId should be a nested structure, like a map, then model it accordingly.

In other words: the type in your "bean" should be something else than String. For example, a map. Or maybe, some self-written class that has a single member being a string.

Anything else is just very confusing for your readers. Your code should communicate your intent. And a field that is a string isn't a map.

Its like saying: "look here, my cute cat", where in reality, you have a dog, but you force him into a kitten-costume to look like a cat.

I solved returning Map instead of String:

public Map<String, String> getCampaignId() {

    Map<String, String> c = new HashMap<>();

    c.put("campaignId", campaignId);

    return c;

}

That's working but if anybody knows how can be done using Jackson annotations or another more elegant solution, I will accept.