Java unicode to char

RestClient.java

/**
*  http://stackoverflow.com/questions/11145681/how-to-convert-a-string-with-unicode-encoding-to-a-string-of-letters
* use StringEscapeUtils.unescapeJava(encodeUniCode String)
*/
@Component
public class RestClient {

    private final RestTemplate restTemplate;

    public RestClient(){
        restTemplate = new RestTemplate();
        HttpHeaders headers = getJsonHeader();
    }


    public HttpHeaders getJsonHeader(){
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", MediaType.APPLICATION_JSON_VALUE);
        return headers;
    }

    public String exchangeToString(String url, HttpMethod method) {
        return exchangeToString(url,method,getJsonHeader());
    }

    public String exchangeToString(String url, HttpMethod method , HttpHeaders headers) {
        HttpEntity<String> requestEntity = new HttpEntity<>(headers);
        ResponseEntity<String> response =
                restTemplate.exchange(url, method, requestEntity, String.class);
        String body = response.getBody();
        return StringEscapeUtils.unescapeJava(body);
    }

}