code: public JSONArray toJSONArray(Collection<String> names) throws JSONException {
  		if (CollectionUtil.isEmpty(names)) {
  			return null;
  		}
  		final JSONArray ja = new JSONArray();
  		Object value;
  		for (String name : names) {
  			value = this.get(name);
  			if (null != value) {
  				ja.put(value);
  			}
  		}
  		return ja;
  	}
docs: 将指定KEY列表的值组成新的JSONArray
  
  @param names KEY列表
  @return A JSONArray of values.
  @throws JSONException If any of the values are non-finite numbers.