求助！Feign调用报错：No qualifying bean of type 'org.springframework.boot.autoconfigure.http.HttpMessageConverters'
0 悬赏园豆： 50 [待解决问题] 在GateWay通过FeignClient调用Auth模块的方法出错。
先上错误，然后是源码，最后是结论： feign.codec.EncodeException: No qualifying bean of type 'org.springframework.boot.autoconfigure.http.HttpMessageConverters' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:384) ~[feign-core-10.7.4.jar:na] Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: Error has been observed at the following site(s): |_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain] |_ checkpoint ⇢ HTTP POST "/usercenter/login/test" [ExceptionHandlingWebHandler] Stack trace: at feign.ReflectiveFeign$BuildEncodedTemplateFromArgs.resolve(ReflectiveFeign.java:384) ~[feign-core-10.7.4.jar:na] at feign.ReflectiveFeign$BuildTemplateByResolvingArgs.create(ReflectiveFeign.java:232) ~[feign-core-10.7.4.jar:na] at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:75) ~[feign-core-10.7.4.jar:na] JsonResule返回类与User类 public class JsonResult implements Serializable { private final long SERIALIZABLE_ID = 1<<31L; private int status; private boolean success; private String message; private Object result; private JsonResult(){ status=200; success=true; message=null; result=null; } /*------------一些方法------------*/ /*------------Getter&Setter实现------------*/ } public class User implements Serializable { private final static long SERIALIZABLE_ID=1<<31L; private String id; private String pwd; private String token; private String path; private String ip; /*------Getter&Setter实现-----*/ ｝ AuthApi模块： @RestController @RequestMapping("token") @CrossOrigin("*") public class AuthApi { @Autowired AuthController authController; /** * @decription 验证用户token及资源权限 * @param user * @return JsonResult */ @RequestMapping("/check") public JsonResult checkToken(@RequestBody User user){ return authController.checkToken(user); } } GateWay的AuthFeignApi及配置类： @Service @FeignClient(value = "auth",configuration = FeignConfig.class) public interface AuthFeignApi { @RequestMapping(value = "/token/check",method = {RequestMethod.POST}) JsonResult checkToken(@RequestBody User user); } @Configuration public class FeignConfig { @Autowired private ObjectFactory<HttpMessageConverters> messageConverters; @Bean Logger.Level feignLoggerLevel() { return Logger.Level.FULL; } //feign拦截器，设置header信息 @Bean FeignInterceptor feignInterceptor() { return new FeignInterceptor(); } @Bean public Decoder feignDecoder() { return new ResponseEntityDecoder(new SpringDecoder(feignHttpMessageConverter())); } public ObjectFactory<HttpMessageConverters> feignHttpMessageConverter() { final HttpMessageConverters httpMessageConverters = new HttpMessageConverters(new GateWayMappingJackson2HttpMessageConverter()); return new ObjectFactory<HttpMessageConverters>() { @Override public HttpMessageConverters getObject() throws BeansException { return httpMessageConverters; } }; } public class GateWayMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter { GateWayMappingJackson2HttpMessageConverter(){ List<MediaType> mediaTypes = new ArrayList<>(); mediaTypes.add(MediaType.valueOf(MediaType.TEXT_HTML_VALUE + ";charset=UTF-8")); mediaTypes.add(MediaType.valueOf(MediaType.APPLICATION_JSON_VALUE + ";charset=UTF-8")); setSupportedMediaTypes(mediaTypes); } } } public class FeignInterceptor { public void apply(RequestTemplate requestTemplate) { requestTemplate.header("Access-Control-Allow-Origin", "*") .header("Content-Type","application/json"); } } GateWay的拦截器中调用AuthFeignApi: @Controller public class AuthenticationFitler implements GlobalFilter, Ordered { @Autowired(required = true) AuthFeignApi authFeignApi; /** * 拦截器，校验 * @param exchange * @param chain * @return */ public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { // exchange.getRequest().getHeaders().set("Access-Control-Allow-Origin","*"); String token = exchange.getRequest().getHeaders().getFirst("token"); String id = exchange.getRequest().getHeaders().getFirst("id"); String pwd = exchange.getRequest().getHeaders().getFirst("pwd"); String path = exchange.getRequest().getPath().toString(); //是否为白名单 if(WhiteListFilter.isWhiteUser(id)||WhiteListFilter.isWhiteResources(path)) return chain.filter(exchange); //token校验 User user = new User(); user.setToken(token); user.setId(id); user.setPwd(pwd); JsonResult result = authFeignApi.checkToken(user); //此处 if(!result.isSuccess()){ exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED); return exchange.getResponse().setComplete(); } //用户-资源权限校验 return chain.filter(exchange); } } 结论
试过去掉checkToken()方法的参数User，也就是无参调用AuthApi，这样可以调用，然后返回JsonResult的时候报错，所以猜想是接口间传递数据出了问题。但是从早上试到现在，网上找到的方法基本都试过了，还是没能解决。
求大佬解答，感激不尽！ SpringCloud Feign GateWay real_zhui | 初学一级 | 园豆： 82
提问于：2020-08-17 15:41 显示帮助
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楼主的错误看着像是spring没法找到接口实现导致的，我看你的feign接口上加了@Service，可以去掉试试，@FeignClient一个注解就够了，在入口类上别忘启动@EnableFeignClients 8号位 | 园豆：234 (菜鸟二级) | 2020-08-17 16:15 去掉了@Service注解也不行....... 支持( 0 ) 反对( 0 ) real_zhui | 园豆：82 (初学一级) | 2020-08-17 17:23 编辑文本 预览 上传图片
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