Format Date with OpenFeign

Question

My Feign client is defined as follow :

@FeignClient(name = "${feign.name}",url = "${feign.url}",
        configuration = {DateFormatConfiguration.class})
public interface MyFeignClient {

@GetMapping(value = "/test")
    ResponseEntity<MyResponse> getResponse(@RequestParam(value = "date") Date date);

}

Where :

 class DateFormatConfiguration {
    
    DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

    @Bean
    public FeignFormatterRegistrar dateFeignFormatterRegistrar() {
        return formatterRegistry -> formatterRegistry.addFormatter(new Formatter<Date>() {
            @Override
            public Date parse(String text, Locale locale) throws ParseException {
                return df.parse(text);
            }
            @Override
            public String print(Date object, Locale locale) {
                return df.format(object);
            }
        });
    }
   }

However when I run this test :

@Test
public void test(){
    Date date= new GregorianCalendar(2000, 12, 31).getTime();
    myFeignClient.getResponse(date);
}

the request is sent into this format :

---> GET https:xxx/test?date=Wed%20Jan%2031%2000%3A00%3A00%20EST%202001

What I'm trying to have is :

---> GET https:xxx/test?date=2000-12-31

Where the date is formatter as I need.

I've tried also this solution, but not working neither:

class DateFormatConfiguration {
        
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    
        @Bean
        public JacksonEncoder feignEncoder() {
            return new JacksonEncoder(customObjectMapper());
        }
    
        @Bean
        public JacksonDecoder feignDecoder() {
            return new JacksonDecoder(customObjectMapper());
        }
    
        private ObjectMapper customObjectMapper(){
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.setDateFormat(df);
            return objectMapper;
        }
       }

Any Ideas ?

Answer 1

You should consider trying replace necessary lines with something like this:

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd");    
LocalDate date= LocalDate.ofInstant(new GregorianCalendar(2000, 12, 31).getTime().toInstant(), ZoneId.of(TimeZone.getDefault().getID()));
String dateFormatted = date.format(dtf);