Trying to Send list of string in post request using webClient in spring

I am trying to send a list of strings using webClient but I am getting an exception.

I used Flux.fromIterable(strList) but it merged all the data before sending, because of that instead of a list of strings I received combined single string on mapping class.

 List<String> str = new ArrayList<>();
             str.add("korba");
             str.add("raipur");
             str.add("bhilai");

   Flux<Object> responsePost = webClient.build()
                      .post()
                      .uri(url)
                      .header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
                      .body(Flux.fromIterable(str), String.class)
                      .retrieve()
                      .bodyToFlux(Object.class);