Apache POI-3.14.jar是java实现文件批量导入导出的多功能工具包包，多用于拓展jdk的导入导出、写入读取excel表格功能，兼容xls、xlsx，需要的程序猿们快来IT猫扑下载使用吧！

Apache POI是什么

Apache POI是一个开源的Java读写Excel、word等微软OLE2组件文档的项目。

Apache POI 3.14 内容

Apache POI是Apache软件基金会的开放源码函式库，POI提供API给Java程序对Microsoft office格式档案读和写的功能。

POI的jar包导入

jar包版本使用poi-3.14和poi-ooxml-3.14。目前最新的版本是3.16。因为3.15以后相关api有更新，部分操作可能不一样，大家注意下。

Apache POI3.14.jar结构

HSSF － 提供读写Microsoft Excel格式档案的功能。

XSSF － 提供读写Microsoft Excel OOXML格式档案的功能。

HWPF － 提供读写Microsoft Word格式档案的功能。

HSLF － 提供读写Microsoft PowerPoint格式档案的功能。

HDGF － 提供读写Microsoft visio格式档案的功能。

poi 3.14 jar改进日志

add59056 - Render individual slideshow shapes；

fix59074 - ExtractorFactory should give a more helpful exception on old Excel files too old for ExcelExtractor；

add57989 - XSSFChart support for setting chart titles；

fix59030 - Prevent NPE in XWPFTableCell's getVerticalAlignment() from Prasad Babu；

fix59021 - XSSFSheetXMLHandler fails to extract content if namespace is included in qName；

fix56345 - Reject single-cell merged regions；

fix58339 - Make OFFSET() allow missing optional height and width parameters；

addgithub-27 - Handle documents with a picture-only header；

fix58996 - Regression caused by fixing bug 56295: Don't try to unset fill color if it is not set to avoid invalid access inside the Xml structures；

fix57034 - Cell.setcellValue((String)null) should be treated as an empty cell on SXSSF as well, to avoid a NPE when autosizing columns；

fix XSLF - fixed NPE when adding pictures with existing non-picture media files (e.g. movies)；

fix58885 - Fixed preformance regression after fixing bug 58443 when adding a merged region to an XSSFSheet；

add Raised xmlsec version to 2.0.6；

add47291 - Cannot open link correctly which insert in ppt；

add41047 - Support hyperlinks in HSLF shapes and textruns；

add58879 - Return SpreadsheetVersion from Workbook；

fix Fix NPE when calling HSLFTextRun.setHorizontalCentered()；

add58633 - Set multiple cell style properties at once；

add56004 - Support for WMF rendering；

add56892 - Add API for inserting ignored warnings into XSSF sheets. This can be used e.g. to suppress 'number stored as text' warnings.；

add58847 - Getters/setters/removers for the additional well-known document summary information properties from Office 12；

add57796 - Support hyperlink extraction when rendering slides；

fix54916 - POI does not always read all the slides in pptx files；

fix58043 - Provide some compatibility between HSSF and XSSF in regards to values for CellStyle.setRotation()；

fix58067 - XWPF: don't return deleted text when document is in review-mode；

fix58618 - XWPFParagraph insertNewRun and removeRun work incorrectly for runs after hyperlink/field runs；

fix58760 - Non-standard namespace-key breaks parsing XLSX files；

fix58746 - Fix missing adjustment of formulas when sheet-ordering is changed.；

fix58616 - Try to initialize with empty password if not done before；

fix Fix some cases where file-handles were left open, mostly when failing to parse documents；

fix55030 - RichTextRun getFontName can not get chinese font name；

fix56570 - RecordType has repeat by code type 3009；

fix58159 - getHeaderText() and getFooterText() duplicate text in sheet.getTextRuns()；

fix58775 - Set maximum number of data formats to avoid corrupted workbook；

add58778 - Override built-in number formats in XSSFWorkbooks；

fix58733 - New AIOOBE in getCell while iterating through a table in PPT；

fix58718 - Master styles not initialized when running multithreaded；