I want to store array json to redis server Java

Question

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 List getting 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}")
@ResponseBody
public 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;

    }