Apache POI - HPSF - Java API for Microsoft Format Document Properties(Apache POI - HPSF - 用于 Microsoft 格式文档属性的 Java API)

Microsoft applications like "Word", "Excel" or "Powerpoint" let the user describe a document by properties like "title", "category" and so on. The application itself adds further information: last author, creation date etc. These document properties are stored in property set streams. A property set stream is a separate document within a POI filesystem. HPSF is POI's pure-Java implementation to read and write property sets.(Microsoft 应用程序，如“Word”、“Excel”或“Powerpoint”，让用户通过“标题”、“类别”等属性来描述文档。应用程序本身添加了更多信息：最后作者、创建日期等。这些文档属性存储在属性集流中。属性集流是 POI 文件系统中的单独文档。 HPSF 是 POI 用于读取和写入属性集的纯 Java 实现。)

The HPSF HOWTO describes what a Java application should do to read a property set using HPSF, how to retrieve the information it needs, and how to write properties into the document.(HPSF HOWTO 描述了 Java 应用程序应该如何使用 HPSF 读取属性集、如何检索它需要的信息以及如何将属性写入文档。)

HPSF supports OLE2 property set streams in general, and is not limited to the special case of document properties in the Microsoft Office files mentioned above. The HPSF description describes the internal structure of property set streams. A separate document explains the internal of thumbnail images.(HPSF 一般支持 OLE2 属性集流，并且不限于上述 Microsoft Office 文件中的文档属性的特殊情况。 HPSF 描述描述了属性集流的内部结构。一个单独的文档解释了缩略图的内部结构。)