How to send array with Spring RestTemplate?

Question

How do I send array parameter with Spring RestTemplate?

This is the server side implementation:

@RequestMapping(value = \"/train\", method = RequestM         


        

Answer 1

I ended up constructing the URL by looping through the collection.

Map map = new HashMap();
map.put("category", parameters.getName());

String url = "http://localhost:8080/admin/train?category={category}";
if (positiveDocs != null && positiveDocs.size() > 0) {
    for (String id : positiveDocs) {
        url += "&positiveDocId[]=" + id;
    }
}
if (negativeDocId != null && negativeDocId.size() > 0) {
    for (String id : negativeDocId) {
        url += "&negativeDocId[]=" + id;
    }
}

TrainResponse response = restTemplate.getForObject(url, TrainResponse.class, map);