对象判空
Watermark watermark = new Watermark();
<#if watermark != null && watermark != ‘’></#if>
队列判空
List ArticleArea = articleAreaService.getName();
<#if ArticleArea?? && ArticleArea.size() gt 0></#if>
freemarker中对象判空与队列判空
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转载自blog.csdn.net/weixin_40902244/article/details/90036029
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