FreeMarker 對null值的處理技巧

如下引用官方描述： 引用 The FreeMarker template language doesn't know the Java language null at all. It doesn't have null keyword, and it can't test if something is null or not. 1.判斷是否存在,經過exists關鍵字或者"??"運算符。都將返

>>阅读原文<<