I want to store array json to redis server Java

Please Please Help me I want to store array JSON to Redis server Need Help Please

http://localhost:8585/api/redishome/redisGetBestTrainerBasedRating/101

response

{"message": "class java.util.ArrayList cannot be cast to class com.mycareerbuild.user.domain.BestTrainerBasedRating (java.util.ArrayList is in module java.base of loader 'bootstrap'; com.mycareerbuild.user.domain.BestTrainerBasedRating is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader @5e243bf4)"}

I am able to store this below response without Making List

 {"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 0.0,"image": "null","language": "kannada"}

But I want to store it like this below when I try to make in with Listgetting above error response

[{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 0.0,"image": "null","language": "kannada"},{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 0.0,"image": "null","language": "telugu"},{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 6.0,"image": "null","language": "kannada"},{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 6.0,"image": "null","language": "telugu"},{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 10.0,"image": "null","language": "kannada"},{"trainerid": 28,"rating": 5.0,"trainerName": "yellow","courseName": "","price": 10.0,"image": "null","language": "telugu"}

]

My controller

@PutMapping("/redisGetBestTrainerBasedRating/{trainerid}")@ResponseBodypublic ResponseEntity<List<BestTrainerBasedRating>> redisGetBestTrainerBasedRating(@RequestBody List<BestTrainerBasedRating> item,@PathVariable Long trainerid) throws JsonProcessingException {    List<BestTrainerBasedRating> ans = hc.redisGetBestTrainerBasedRating(item, trainerid);    return new ResponseEntity<List<BestTrainerBasedRating>> (ans, HttpStatus.OK);}Component :@CachePut(value = "homeCache", key = "#trainerid", condition = "#result!= null")public List<BestTrainerBasedRating> redisGetBestTrainerBasedRating(List<BestTrainerBasedRating> item, Long trainerid)  {    System.out.println("In redisGetBestTrainerBasedRating cache Component..");    // item.setAnswer(item.getAnswer());    List<BestTrainerBasedRating> ans = cacheRepo.redisGetBestTrainerBasedRating(item, trainerid);    return ans;    // "Answer Submiteed with questionId "+questionId;}

Redis store code

    public List<BestTrainerBasedRating> redisGetBestTrainerBasedRating(List<BestTrainerBasedRating> item, Long trainerid)  {        System.out.println("Geeting data from redis"+((BestTrainerBasedRating) item).getTrainerid());       hashOperations.put(KEY,((BestTrainerBasedRating) item).getTrainerid(),item);        return  item;    }