Apache POI 3.16 beta 2 发布了，Apache POI 是一个开源的 Java 读写 Excel、WORD 等微软 OLE2 组件文档的项目。目前 POI 已经有了 Ruby 版本。这次更新包括一批功能性领域和 bug 修复。
更新内容：
fix：SS Common：DataFormatter parses months incorrectly when put at the end of date segment
fix：XSSF：Unlink hyperlinks node if all hyperlinks removed from a sheet
add：POI：Add rudimentary read-only capability for EMF
add：SS Common,XSSF：Support embedding OLE1.0 package in XSSF / SS Common
add：SS Common：Partial support for unicode sheet names
add：HSMF：Parse Content-ID for inline images in MAPIMessages
fix：XSSF：Fix performance problem with XPath parsing in XSSF import from XML
fix：HWPF：NPE when reading a document containing an embedded picture
add：XSSF：XSSFGroupShape nesting
add：SS Common：Extractor for *SSF embeddings
add：SS Common：SS Common classes for *SSF shapes
fix：OOXML：Make loggers final and make throttled log actually work, thanks to PJ Fanning for the patch
fix：SS Common：WorkdayCalculator calculateWorkdays does return wrong value for same day input, thanks to Fabio Heer for the patch
add：XWPF：Cannot specify Interline spacing for paragraphs
fix：XWPF：Unable to add image to Word document header
update：SL Common：Mixed fonts issue with Chinese characters (unable to form images from ppt)
remove：OOXML：Remove deprecated classes - remove constructors with PackageRelationship argument (breaks backwards compatibility)
fix：XWPF：Added try/catch block to swallow NPE
fix：XSSF：Encode some special characters when setting title/text for validation text-boxes
fix：XSLF：Creating pictures in PowerPoint slides requires scratchpad-jar for adding WMF images
remove：HPSF：Remove deprecated classes - deprecate Mutable* property classes (breaks backwards compatibility)
fix：SS Common：Check for actual Excel limits on data validation title/text
fix ：XSLF ：TableCell.getTextHeight() returns NullPointerException
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