版本: Spring Cloud 2020.0.3
常见的方法有 实现自己的 DefaultErrorWebExceptionHandler 或 仅实现ErrorAttributes.
方法1: ErrorWebExceptionHandler (仅供示意)
自定义一个 GlobalErrorAttributes:
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@Component
public class GlobalErrorAttributes extends DefaultErrorAttributes{
@Override
public Map<String, Object> getErrorAttributes(ServerRequest request, ErrorAttributeOptions options) {
Throwable error = super.getError(request);
Map<String, Object> map = super.getErrorAttributes(request, options);
map.put("status", HttpStatus.BAD_REQUEST.value());
map.put("message", error.getMessage());
return map;
}
}
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实现一个
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@Component
@Order(-2)
public class GlobalErrorWebExceptionHandler extends AbstractErrorWebExceptionHandler {
public GlobalErrorWebExceptionHandler(GlobalErrorAttributes gea, ApplicationContext applicationContext,
ServerCodecConfigurer serverCodecConfigurer) {
super(gea, new WebProperties.Resources(), applicationContext);
super.setMessageWriters(serverCodecConfigurer.getWriters());
super.setMessageReaders(serverCodecConfigurer.getReaders());
}
//渲染html或json
@Override
protected RouterFunction<ServerResponse> getRoutingFunction(final ErrorAttributes errorAttributes) {
return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse);
}
private Mono<ServerResponse> renderErrorResponse(final ServerRequest request) {
final Map<String, Object> errorPropertiesMap = getErrorAttributes(request, ErrorAttributeOptions.defaults());
return ServerResponse.status(HttpStatus.BAD_REQUEST)
.contentType(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromValue(errorPropertiesMap));
}
}
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方法2, 仅实现一个 ErrorAttributes, 以覆盖默认的 DefaultErrorAttributes
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//Spring 默认的就很好了.
@Component
public class GatewayErrorAttributes extends DefaultErrorAttributes {
private static final Logger logger = LoggerFactory.getLogger(GatewayErrorAttributes.class);
@Override
public Map<String, Object> getErrorAttributes(ServerRequest request, ErrorAttributeOptions options) {
Throwable error = super.getError(request);
Map<String, Object> errorAttributes = new HashMap<>(8);
errorAttributes.put("message", error.getMessage());
errorAttributes.put("method", request.methodName());
errorAttributes.put("path", request.path());
MergedAnnotation<ResponseStatus> responseStatusAnnotation = MergedAnnotations
.from(error.getClass(), MergedAnnotations.SearchStrategy.TYPE_HIERARCHY).get(ResponseStatus.class);
HttpStatus errorStatus = determineHttpStatus(error, responseStatusAnnotation);
//必须设置, 否则会报错, 因为 DefaultErrorWebExceptionHandler 的 renderErrorResponse 方法会获取此属性, 重新实现 DefaultErrorWebExceptionHandler也可.
errorAttributes.put("status", errorStatus.value());
errorAttributes.put("code", errorStatus.value());
//html view用
errorAttributes.put("timestamp", new Date());
//html view 用
errorAttributes.put("requestId", request.exchange().getRequest().getId());
errorAttributes.put("error", errorStatus.getReasonPhrase());
errorAttributes.put("exception", error.getClass().getName());
return errorAttributes;
}
//从DefaultErrorWebExceptionHandler中复制过来的
private HttpStatus determineHttpStatus(Throwable error, MergedAnnotation<ResponseStatus> responseStatusAnnotation) {
if (error instanceof ResponseStatusException) {
return ((ResponseStatusException) error).getStatus();
}
return responseStatusAnnotation.getValue("code", HttpStatus.class).orElse(HttpStatus.INTERNAL_SERVER_ERROR);
}
}
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这样就可以了.
注意注意: 必须设置 errorAttributes.put("status", errorStatus.value()) , 否则会报错, 因为 DefaultErrorWebExceptionHandler 的 renderErrorResponse 方法会获取此属性. 除非你自己像方法一一样重新实现 DefaultErrorWebExceptionHandler.
然后在网关中访问一个不存在的服务, 即可看到效果.
curl 'http://127.0.0.1:8900/fundmain22/abc/gogogo?id=1000' --header 'Accept: application/json'
{"exception":"org.springframework.web.server.ResponseStatusException","path":"/fundmain22/abc/gogogo","code":404,"method":"GET","requestId":"094e53e5-1","message":"404 NOT_FOUND","error":"Not Found","status":404,"timestamp":"2021-08-09T11:07:44.106+0000"}
感谢网络上的各种文章...
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原文链接：https://www.cnblogs.com/cnscud/p/15120406.html