public short getShortValue(String key) {
        Object value = get(key);
        if (value == null) {
            return 0;
        }
        return castToShort(value);
    }
@author Robert HG (254963746@qq.com) on 12/28/15.
lts-core/src/main/java/com/github/ltsopensource/json/JSONObject.java