Spring : Convert Response Entity to JSON - arrays

Question

From my rest client, i am hitting a web service and getting my response in the form of String {"code":"00000","msg":"Success"> . Now I am converting this in the form of JSONObject which i can then use further. But i am not able to. Below is the code i am using . Please guide.
private ResponseEntity<String> test()
{
final String uri = "URL";
RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> entity = new HttpEntity<String>("parameters", headers);
ResponseEntity<String> result = restTemplate.exchange(uri, HttpMethod.GET, entity, String.class);
System.out.println(result);
//This part is not working.
try {
JSONObject arr = new JSONObject((result));
for (int i = 0; i < arr.length(); i++) {
JSONObject abc = arr.getJSONObject(i);
System.out.println("test1 : " + abc.getString("test1"));
System.out.println("test2 : " + abc.getString("test2"));
System.out.println("test3 : " + abc.getString("test3"));
}
} catch (Exception e) {
}
return result;
}

Answer 1

Instead of converting to a generic JSONObject, you should create a class matching your response.
Spring will map the response to your model class using Jackson(behind the scenes). There is no need for converting it yourself.
So Let's say, you create a class
class Response {
String code;
String message:
//Gettes and Setters
}
Now you can change your code a bit like this
ResponseEntity<Response> result = restTemplate.exchange(uri, HttpMethod.GET, entity, Response.class);
Now if you useresult.getBody(), this would give your Response object, which you can use

Answer 2

One form is using JSONObject
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
<scope>${scope}</scope>
</dependency>
import org.json.simple.JSONObject;
JSONObject json = new JSONObject();
json.put("key1", value1);
json.put("key2", value2);