Send JSON request - JQuery analog

I need to send a JSON request similar to jQuery's ajax method.

The official documentation quote on the data parameter says:

If value is an Array, jQuery serializes multiple values with same key based on the value of the traditional setting

So I have the same situation - a key that maps to an array "parameters":[123123, {"category":"123"}]

The complete data parameter looks like

$.ajax({
      url: "/api/",
      data: {"parameters":[123123, {"category":"123"}], "anotherParameter":"anotherValue"}
 

Would you mind telling how to achieve the same functionality in Java ?

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