Facing problem in calling get method API with query parameters using rest template.

Hi,

I am trying to call one get method API by passing query parameters using rest template. I am passing the request in the proper format only, but I am getting the

 error as message as "400 null". 

curl -X GET \

  'http://localhost:8086/uaa/Groups?filter=identity_zone_id%20eq%20%22uaa%22' \

  -H 'authorization: Bearer eyJhbGciOiJIUzI1NiIsImtpZCI6ImxlZ2FjeS10b2tlbi1rZXkiLCJ0eXAiOiJKV1QifQ.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.LbVu7inr5htyOHPyoN_KzIyFRZZiiiCV4xZHTCJZR30'

public String listGroup(String accessToken){

String transactionUrl = "http://localhost:8086/uaa/Groups";

HttpHeaders headers = new HttpHeaders();

headers.set("Authorization", "Bearer "+accessToken);

   HttpEntity<String> entity = new HttpEntity<String>(headers);

UriComponentsBuilder builder = UriComponentsBuilder

    .fromUriString(transactionUrl)

    // Add query parameter

    .queryParam("filter", "identity_zone_id+eq+%22uaa%22");

    

RestTemplate restTemplate = new RestTemplate();

//String response = restTemplate.getForObject(builder.toUriString(), String.class);

System.out.println("URL===="+builder.toUriString());

try {

String param= URLDecoder.decode("filter=identity_zone_id%2Beq%2B%2522uaa%2522", "UTF-8");

            System.out.println("param=="+param+"\n");

String decodedURL = URLDecoder.decode(builder.toUriString(), "UTF-8");

            System.out.println("decodedURL=="+decodedURL+"\n");

            System.out.println("----------------------------------------------------");

            System.out.println(URLDecoder.decode(builder.toUriString(), "UTF-8"));

            System.out.println("entity=="+entity);

//String decodedURL = java.net.URLDecoder.decode(builder.toUriString(), "UTF-8");

ResponseEntity<String> response = 

        restTemplate.exchange(decodedURL, 

                              HttpMethod.GET, entity, String.class, param);

return "Success-"+response;

} catch (UnsupportedEncodingException ex) {

            ex.printStackTrace();

        }

return "error";

}

Can anyone help me out in resolving this issue.

Thanks & Regards,

Shilpa Kulkarni

Try using buildAndExpand

String transactionUrl = "http://localhost:8086/uaa/Groups?filter={value}";

UriComponentsBuilder builder=  UriComponentsBuilder.fromUriString(transactionUrl).buildAndExpand("identity_zone_id+eq+%22uaa%22");