Get Access token genertaed from JSON in SpringBoot Application - json

Question

#RequestMapping(value = "/check", method = RequestMethod.GET)
public ResponseEntity<Product> createProducts() throws JsonProcessingException {
String reqUrl = "http://localhost:8080/home";
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
headers.setContentType(MediaType.APPLICATION_JSON);
Map<String, String> bodyParamMap = new HashMap<String, String>();
bodyParamMap.put("grant_type", "K1");
bodyParamMap.put("client_id", "K2");
bodyParamMap.put("client_secret", "sjxjkdcnjkk");
String reqBodyData = new ObjectMapper().writeValueAsString(bodyParamMap);
HttpEntity<String> requestEnty = new HttpEntity<>(reqBodyData, headers);
ResponseEntity<Product> result = restTemplate.postForEntity(reqUrl, requestEnty, Product.class);
return result;
}
I am geeting a JSON response form result which have access_token which I want to get.
I tried using JSONObject but it is not working. How Can I fetch the value of access_token
JSONObject jsonObject = JSONObject.fromObject(result.toString());
String m = jsonObject.get("access_token").toString();
I tried using this but it is showing compile time error
My output is accepted as
{"access_token":"ghdjhdjhhh","expires_in":2300}
I want to fetch this access_token

Answer 1

when you use postForEntity your Product.class is suppose to represent your result (responseType), so if your converters are well defined(normally the spring boot default ones are sufficient for json) with your class Product looking like this
public class Product {
#JsonProperty("access_token")
private String accessToken;
#JsonProperty("expires_in")
private Long expiresIn;
public String getAccessToken() {
return accessToken;
}
public Long getExpiresIn() {
return expiresIn;
}
public void setAccessToken(String accessToken) {
this.accessToken = accessToken;
}
public void setExpiresIn(Long expiresIn) {
this.expiresIn = expiresIn;
}
}
then you can get your result like this
ResponseEntity<Product> result = restTemplate.postForEntity(reqUrl, requestEnty, Product.class);
Product product = result.getBody();
String token = product.getAccessToken()