Spring|Spring Cloud Gateway自定义异常处理Exception Handler的方法小结 SpringCloudGateway自定义异常处理

【Spring|Spring Cloud Gateway自定义异常处理Exception Handler的方法小结】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:

@Componentpublic class GlobalErrorAttributes extends DefaultErrorAttributes{@Overridepublic Map getErrorAttributes(ServerRequest request, ErrorAttributeOptions options) {Throwable error = super.getError(request); Map map = super.getErrorAttributes(request, options); map.put("status", HttpStatus.BAD_REQUEST.value()); map.put("message", error.getMessage()); return map; }}

实现一个

@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@Overrideprotected RouterFunction getRoutingFunction(final ErrorAttributes errorAttributes) {return RouterFunctions.route(RequestPredicates.all(), this::renderErrorResponse); }private Mono renderErrorResponse(final ServerRequest request) {final Map errorPropertiesMap = getErrorAttributes(request, ErrorAttributeOptions.defaults()); return ServerResponse.status(HttpStatus.BAD_REQUEST).contentType(MediaType.APPLICATION_JSON).body(BodyInserters.fromValue(errorPropertiesMap)); }}

方法2, 仅实现一个 ErrorAttributes, 以覆盖默认的 DefaultErrorAttributes

//Spring 默认的就很好了.@Componentpublic class GatewayErrorAttributes extends DefaultErrorAttributes {private static final Logger logger = LoggerFactory.getLogger(GatewayErrorAttributes.class); @Overridepublic Map getErrorAttributes(ServerRequest request,ErrorAttributeOptions options) {Throwable error = super.getError(request); Map errorAttributes = new HashMap<>(8); errorAttributes.put("message", error.getMessage()); errorAttributes.put("method", request.methodName()); errorAttributes.put("path", request.path()); MergedAnnotation 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 responseStatusAnnotation) {if (error instanceof ResponseStatusException) {return ((ResponseStatusException) error).getStatus(); }return responseStatusAnnotation.getValue("code", HttpStatus.class).orElse(HttpStatus.INTERNAL_SERVER_ERROR); }}

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...
到此这篇关于Spring Cloud Gateway自定义异常处理Exception Handler的文章就介绍到这了,更多相关Spring Cloud Gateway自定义异常处理内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！