使用 Webclient 处理成功/错误响应

问：

我有一个api，我在Spring Boot中使用WebClient调用当api调用成功（即200状态）时，我得到的响应如下

{
  "id": 123,
  "username": "john_doe",
  "email": "[email protected]",
  "createdAt": "2023 march"
}

当 API 调用不成功（400 或 500 状态范围）时，响应为

{
    "error": "details",
    "code": "400",
    "message": "Bad Request",
    "details": "The request body is missing a required field."
}

如何处理它。我写了下面的代码。它为成功调用工作，但我无法失败状态代码。

• UserResponse - Pojo 映射成功响应

• ApiErrorResponse - Pojo 映射错误响应

  公共类 ResponseWrapper { 私人最终布尔成功; private final String 消息; 私有 UserResponse userResponse; 私有 ApiErrorResponse apiErrorResponse;

法典

public ResponseWrapper fetchUserData2(UserRequest userRequest) {
        UserResponse userResponse = apiWebClient.post()
                .uri("https://demo4108264.mockable.io/test")
                .body(Mono.just(userRequest), UserRequest.class)
                .retrieve()
                
                .onStatus(HttpStatus::is4xxClientError, response ->
                response.bodyToMono(ApiErrorResponse.class)
                        .flatMap(errorResponse -> Mono.error(new CustomApiException(errorResponse)))
        )
                .bodyToMono(UserResponse.class)
                .block();
        
        // Process the response based on success or error
        if (userResponse != null) {
            System.out.println(" success " + userResponse.getId());
            // Handle success
            return new ResponseWrapper(true, "API call successful", userResponse,null);
        } else {
            System.out.println(" error occured " );
            return new ResponseWrapper(false, "API call failed", null,null);
        }