标签： java pdf acrobat form-fields
I am looking to create some sort of tracker that will allow me to see how many times a document is opened.
Is it possible to create a form field within a pdf that will download a file from a web server once it is opened?
答案 0 :(得分：0)
Acrobat Javascript脚本规范包含了各种文档（doc）事件。其中之一是“文档/打开”。每当打开文档时都会触发此事件。 Here是实现标准事件的pdf示例文件，应该会给您带来可能性的提示。
此article详细解释了该概念。