代码如下，字段类型声明为Boolean类型，反序列化以后，isAbc字段是null。不过如果json串中的字段是is-abc可以反序列化成功。

public static void main(String[] args) {
        System.out.println(JSON.VERSION);
        String json = "{\"IsAbc\":true}";
        BooleanJson booleanJson = JSON.parseObject(json, BooleanJson.class);
    }

   private static class BooleanJson {
        @JSONField(name = "IsAbc")
        private Boolean isAbc;

        public Boolean getAbc() {
            return isAbc;
        }

        public void setAbc(Boolean abc) {
            isAbc = abc;
        }
    }