目前POI的最新版本是 3.16-beta2，该版本是测试版本，稳定版本是 3.15，下载地址为 （http://poi.apache.org/download.html）。
一、目录结构
目录结构如下：
二、详细介绍
：https://poi.apache.org/overview.html。
| Maven artifactId | Prerequisites | JAR | Notes |
|---|---|---|---|
| poi-excelant | poi,poi-ooxml | poi-excelant-version.jar | 用于读取表格、写入表格等一系列操作表格所用到的包 |
Component Map
The Apache POI distribution consists of support for many document file formats. This support is provided in several Jar files. Not all of the Jars are needed for every format. The following tables show the relationships between POI components, Maven repository tags, and the project's Jar files.
| Component | Application type | Maven artifactId | Notes |
|---|---|---|---|
| OLE2 Filesystem | poi | Required to work with OLE2 / POIFS based files | |
| OLE2 Property Sets | poi | ||
| Excel XLS | poi | For HSSF only, if common SS is needed see below | |
| PowerPoint PPT | poi-scratchpad | ||
| Word DOC | poi-scratchpad | ||
| Visio VSD | poi-scratchpad | ||
| Publisher PUB | poi-scratchpad | ||
| Outlook MSG | poi-scratchpad | ||
| DDF | Escher common drawings | poi | |
| HWMF | WMF drawings | poi-scratchpad | |
| OOXML | poi-ooxml plus either poi-ooxml-schemas orooxml-schemas and ooxml-security | See notes below for differences between these options | |
| Excel XLSX | poi-ooxml | ||
| PowerPoint PPTX | poi-ooxml | ||
| Word DOCX | poi-ooxml | ||
| Visio VSDX | poi-ooxml | ||
| PowerPoint PPT and PPTX | poi-scratchpad and poi-ooxml | SL code is in the core POI jar, but implementations are in poi-scratchpad and poi-ooxml. | |
| Excel XLS and XLSX | poi-ooxml | WorkbookFactory and friends all require poi-ooxml, not just core poi |
This table maps artifacts into the jar file name. "version-yyyymmdd" is the POI version stamp. You can see what the latest stamp is on the .
| Maven artifactId | Prerequisites | JAR |
|---|---|---|
| poi | , , , | poi-version-yyyymmdd.jar |
| poi-scratchpad | poi-scratchpad-version-yyyymmdd.jar | |
| poi-ooxml | , | poi-ooxml-version-yyyymmdd.jar |
| poi-ooxml-schemas | poi-ooxml-schemas-version-yyyymmdd.jar | |
| poi-examples | , , | poi-examples-version-yyyymmdd.jar |
| ooxml-schemas | ||
| ooxml-security | For signing: , , , |
Note：Apache commons-collections4 was added as a dependency in POI 3.15 beta 3.
poi-ooxml requires poi-ooxml-schemas. This is a substantially smaller version of the ooxml-schemas jar (ooxml-schemas-1.3.jar for POI 3.14 or later, ooxml-schemas-1.1.jar for POI 3.7 up to POI 3.13, ooxml-schemas-1.0.jar for POI 3.5 and 3.6). The larger ooxml-schemas jar is only required for development. Similarly, the ooxml-security jar, which contains all of the classes relating to encryption and signing, is normally only required for development. A subset of its contents are in poi-ooxml-schemas. This JAR is ooxml-security-1.1.jar for POI 3.14 onwards and ooxml-security-1.0.jar prior to that.
The OOXML jars require a stax implementation, but now that Apache POI requires Java 6, that dependency is provided by the JRE and no additional stax jars are required. The OOXML jars used to require DOM4J, but the code has now been changed to use JAXP and no additional dom4j jars are required. By the way, look at this if you have problems when using a non-Oracle JDK.
The ooxml schemas jars are compiled with 2.3, and so can be used at runtime with any version of XMLBeans from 2.3 or newer. Wherever possible though, we recommend that you use XMLBeans 2.6.0 with Apache POI, and that is the version now shipped in the binary release packages.
总结：按照需要导入jar包及相关依赖jar包。
poi-3.15.jar (excel文件生成需要)
poi-examples-3.15.jar(官方示例，开发不需要)
poi-excelant-3.15.jar(不需要)
poi-ooxml-3.15.jar(excel,word,ppt均需要)
poi-ooxml-schemas-3.15.jar(excel需要)
poi-scratchpad-3.15.jar(ppt,vsd,word,viso,outlook等需要)