@Override
    public int getIntValue(String key) {
        Object value = get(key);
        if (value == null) {
            return 0;
        }
        return castToInt(value);
    }
@author Robert HG (254963746@qq.com) on 11/20/15.
lts-core/src/main/java/com/github/ltsopensource/core/json/jackson/JacksonJSONObject.java