Spring Boot OpenFeign 发送 form-url-encoded 表单数据

代码

注意：Map中的value泛型必须是?（即：Map<String, ?>），否则会带上modCount、table这些Map的字段。

@FeignClient(name = "my-feign-client", url = "${keycloak.auth-server-url}")
public interface TokenFeign {

    @PostMapping(value = "/realms/{realm}/protocol/openid-connect/token", consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    @ResponseBody
    ResponseEntity<JsonNode> createToken(@PathVariable(value = "realm") String realm, Map<String, ?> params);

}

备注

用的spring-cloud-starter-openfeign版本是3.0.5，如果还是无法请求成功，可以添加一下配置

@Configuration
@RequiredArgsConstructor
public class FeignConfig {

    private final ObjectFactory<HttpMessageConverters> messageConverters;

    @Bean
    public Encoder encoder(ObjectFactory<HttpMessageConverters> converters) {
        return new SpringFormEncoder(new SpringEncoder(converters));
    }

}