@Test
    public void jsonSerializationTest3() {
        String json = "{\n" +
                "    \"c\":[\"1.1\"]\n" +
                "}";

        Bean bean = JSON.parseObject(json, Bean.class);
        // com.alibaba.fastjson2.JSONException: can not cast to decimal
        System.out.println(bean.getC());
    }
    
    @Test
    public void jsonSerializationTest2() {
        String json = "{\n" +
                "    \"b\":['1']\n" +
                "}";
        Bean bean = JSON.parseObject(json, Bean.class);
        System.out.println(bean.getB()); // [
    }
    @Data
    public static class Bean {
        private Character b;
        private Double c;
    }