无法解析类型java.lang.Object_java类型转换异常

 @PostMapping("add/xxxx")
    public ResponseObj addXXXX(@RequestBody Map<String, Object> map){
}

List<XXXX> list = (List<XXXX>) map.get("list");

//所有名字集合 
ArrayList<String> XXXXNameList = XXXXDao.getAllXXXXNameListById(id); 
//过滤list，名字不在XXXXNameList中的
List<XXXX> collect = list.stream().
                    filter(e -> !XXXXNameList.contains(e.getName())).collect(Collectors.toList());

List<XXX> list1 = (List<XXX>) map.get("list");
ObjectMapper mapper = new ObjectMapper();
List<XXX> list = mapper.convertValue(list1, new TypeReference<List<XXX>>() { });