阿里巴巴fastjson版本从1.2.72升级到2.0.14。开启autoType，不支持Object对象接收强转成Java对象的解决方案。_fastjson 最新版本

方案一：Object对象接收强转成Java对象，需要先转成JSON对象，再转换成Java对象。 

 
    @Autowired
    public RedisTemplate redisTemplate;
    
    @Test
    public void fastJson(){
        /*
         * redis 数据：
         * {"@type":"xx.xx.GoodsDetailDTO","goodsName":"HK GOLD香港黄金","goodsPrice":100.00}
         * 
         * 错误信息：
         * java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be cast to xx.xx.GoodsDetailDTO
         */
 
        //@Version 1.2.72
        GoodsDetailDTO goodsDetail;
        //Object对象
        Object object = this.getCacheObject(GoodsKeyConstant.GOODS_DETAIL_KEY + 1L);
        if (Objects.nonNull(object)) {
            //Object对象强转成Java对象
            goodsDetail = (GoodsDetailDTO) object;
            log.info("商品信息:{}", JSONObject.toJSONString(goodsDetail));
        }
 
        //@Version 2.0.14
        //先转成JSON对象
        JSONObject jsonObject = this.getCacheObject(GoodsKeyConstant.GOODS_DETAIL_KEY + 1L);
        //JSON对象转换成Java对象
        GoodsDetailDTO goodsDetailDTO = jsonObject.toJavaObject(GoodsDetailDTO.class);
        log.info("商品信息:{}", JSONObject.toJSONString(goodsDetailDTO));
    }
 
    private  <T> T getCacheObject(String key) {
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }