java - 错误 :(229, 12) java : exception org. springframework.web.client.HttpStatusCodeException 已被捕获

Question

我不能使用多个 catch 吗？第一次捕获使用 RestClientException ，第二次捕获使用 HttpStatusCodeException

 try {
         ResponseEntity<Stdo> responseEntity = restTemplate.exchange(theUrl, HttpMethod.POST, entity, Stdo.class);
  }catch (RestClientException ex) {
          if (ex.toString().contains("Connection timed out")) {
            }
  }catch(HttpStatusCodeException ex)
    {
        // get http status code
   }
}

错误

Error:(229, 12) java: exception org.springframework.web.client.HttpStatusCodeException has already been caught

Answer 1

文档中的层次结构证实了您所读到的错误。 HttpStatusCodeException

extends RestClientResponseException

和 RestClientResponseException

extends RestClientException

因此出现错误。您可以按相反的顺序使用这些多个 catch。

catch(HttpStatusCodeException ex) {
    // get http status code
} catch (RestClientException ex) {
    if (ex.toString().contains("Connection timed out")) {...}
}