I develop a Spring Boot project and I use ExceptionHandler to catch all exceptions with @RestControllerAdvice annotation. There is no problem on Server side to catch exception. However, I don't know how to catch these exceptions in client application.
Could you help me please ?
If you're using spring-web's RestTemplate, here's an example:
try { ResponseEntity<String> response = new RestTemplate().getForEntity(url, String.class); System.out.println("Response: " + response.getBody()); } catch (HttpStatusCodeException e) { System.err.println("Problem querying " + url + ". " + "Status code " + e.getStatusCode() + " and error message " + e.getResponseBodyAsString()); } Note that RestTemplate throws an exception by default for error status codes, so you need to catch HttpStatusCodeException.
Not all errors are HttpStatusCodeException though, but all of them have RestClientException as parent and you can also catch it if really needed.
On the client side you are, presumably, using a HTTP client (such as Spring's RestTemplate or Apache Commons' HttpClient). Something like this, perhaps:
ResponseEntity<String> response = restTemplate.getForEntity(url, String.class); Given this code, the HTTP status and the response body are available as follows:
HttpStatus httpStatus = response.getStatusCode(); String responseBody = response.getBody(); So, whatever status code and response body you supplied via your RestControllerAdvice can be read out of the response.
A typical approach would be to assess whether the HttpStatus is a 200 and if it is not then fall into an exception handling block, using the response body to understand the nature of the exception.
