openfeign客户端报错总结

以你之姓@ 2023-07-11 12:39 38阅读 0赞

# 1.SpringCloud集成Feign报错：feign.FeignException$NotFound: status 404 reading #

解决：看看每个接口是否没有加上下文

# 2.no suitable HttpMessageConverter found for request type异常 #

解决：同下

//@Headers({"Content-Type: application/json;charset=UTF-8","Accept: application/json;charset=UTF-8"})
        @RequestMapping(value = "/micro-mall-admin/interiorProxy/goods/admin/product/getProductList",method = RequestMethod.POST,consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)
        public Map proxy(@RequestBody QueryProductParam param);

# 3.no suitable HttpMessageConverter found for response type异常 #

解决：增加配置类：

@Configuration
    @AutoConfigureAfter(JacksonAutoConfiguration.class)
    public class FooClientConfig {
        @Autowired
        ObjectMapper objectMapper;
        @Bean
        public Decoder feignDecoder() {
            HttpMessageConverter jacksonConverter = new MappingJackson2HttpMessageConverter(objectMapper());
            List<MediaType> mediaTypes = new ArrayList<>();
            //mediaTypes.add((MediaType) converter.getSupportedMediaTypes());
            mediaTypes.add(MediaType.TEXT_PLAIN);
            mediaTypes.add(new MediaType("text", "json", Charset.forName("UTF-8")));
            mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
            mediaTypes.add(MediaType.TEXT_HTML);
            mediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
            mediaTypes.add(new MediaType("text", "plain", Charset.forName("UTF-8")));
            ((MappingJackson2HttpMessageConverter) jacksonConverter).setSupportedMediaTypes(mediaTypes);
            ObjectFactory<HttpMessageConverters> objectFactory = () -> new HttpMessageConverters(jacksonConverter);
    
            return new ResponseEntityDecoder(new SpringDecoder(objectFactory));
        }
        @Bean
        public Encoder feignEncoder(){
            HttpMessageConverter jacksonConverter = new MappingJackson2HttpMessageConverter(objectMapper());
            List<MediaType> mediaTypes = new ArrayList<>();
            mediaTypes.add(MediaType.TEXT_PLAIN);
            mediaTypes.add(new MediaType("text", "json", Charset.forName("UTF-8")));
            mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
            mediaTypes.add(MediaType.TEXT_HTML);
            mediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
            mediaTypes.add(new MediaType("text", "plain", Charset.forName("UTF-8")));
            ((MappingJackson2HttpMessageConverter) jacksonConverter).setSupportedMediaTypes(mediaTypes);
            ObjectFactory<HttpMessageConverters> objectFactory = () -> new HttpMessageConverters(jacksonConverter);
            return new SpringEncoder(objectFactory);
        }
    
    
        public ObjectMapper objectMapper() {
            return Jackson2ObjectMapperBuilder.json()
                    .serializationInclusion(JsonInclude.Include.NON_NULL)
                    .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                    .timeZone(TimeZone.getTimeZone("Asia/Shanghai"))
                    .build()
                    .configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);
        }
    
        public ObjectMapper customObjectMapper(){
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);
            return objectMapper;
        }

# 3.java.util.UnknownFormatConversionException: Conversion = '"' 或'\\' #

解决：@Test时不要用printf打印包含转义字符的json

//log.info(JSON.toJSONString(a));
    System.out.printf(""+a.toString());

# 4.服务端返回\{"resultCode":"500","resultMsg":"Content type 'text/plain;charset=UTF-8' not supported"\}  #

解决：同2，在接口加上：

consumes = MediaType.APPLICATION_JSON_UTF8_VALUE