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We will see how we can read or write excel file (.xls or .xlsx) using Apache POI. To know more about Apache POI, click here.
You can download latest version of JAR files from http://poi.apache.org/download.html.
Apache POI is a set of Java APIs that can transfer data to and from Excel and other Microsoft Office file formats. It can be used for extracting text, loading tabular data and generate a document.
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In our case we are using Apache POI 3.8. To run below example you will need to download poi-bin-3.8-20120326.zip file from http://poi.apache.org/download.html. You will get below JAR files, add those in your claspath.Org.apache.poi.3.11 Jar Download
- dom4j-1.6.1.jar
- xmlbeans-2.3.0.jar
- poi-3.8-20120326.jar
- poi-ooxml-3.8-20120326.jar
- poi-ooxml-schemas-3.8-20120326.jar
Please see the self explanatory Java code.
Below are known errors and exceptions faced while writing above code
1. XSSFWorkbook cannot be resolved to a type
Solution : add poi-ooxml-3.8-20120326.jar in classpath. You can download from above link.
2. Exception in thread 'main' java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException
at com.test.TestExcel.writeXLSXFile(TestExcel.java:135)
at com.test.TestExcel.main(TestExcel.java:165)
Caused by: java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
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.. 2 more
Solution: Add xmlbeans-2.3.0.jar in classpath
3. Exception in thread 'main' java.lang.NoClassDefFoundError: org/dom4j/DocumentException
at org.apache.poi.openxml4j.opc.OPCPackage.init(OPCPackage.java:154)
at org.apache.poi.openxml4j.opc.OPCPackage.
at org.apache.poi.openxml4j.opc.Package.
at org.apache.poi.openxml4j.opc.ZipPackage.
at org.apache.poi.openxml4j.opc.OPCPackage.create(OPCPackage.java:293)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.newPackage(XSSFWorkbook.java:316)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.
at com.test.TestExcel.writeXLSXFile(TestExcel.java:135)
at com.test.TestExcel.main(TestExcel.java:165)
Caused by: java.lang.ClassNotFoundException: org.dom4j.DocumentException
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
.. 9 more
Solution: Add dom4j-1.6.1.jar in classpath
4. Exception in thread 'main' java.lang.NoClassDefFoundError: org/openxmlformats/schemas/spreadsheetml/x2006/main/CTSheet
at com.test.TestExcel.writeXLSXFile(TestExcel.java:135)
at com.test.TestExcel.main(TestExcel.java:165)
Caused by: java.lang.ClassNotFoundException: org.openxmlformats.schemas.spreadsheetml.x2006.main.CTSheet
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
.. 2 more
Solution: Add poi-ooxml-schemas-3.8-20120326.jar in classpath
5. Caused by: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Package should contain a content type part [M1.13]
at org.apache.poi.openxml4j.opc.ZipPackage.getPartsImpl(ZipPackage.java:148)
at org.apache.poi.openxml4j.opc.OPCPackage.getParts(OPCPackage.java:623)
at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:230)
at org.apache.poi.util.PackageHelper.open(PackageHelper.java:39)
.. 33 more
Exception in thread 'main' org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
at org.apache.poi.poifs.storage.HeaderBlock.
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at org.apache.poi.poifs.storage.HeaderBlock.at org.apache.poi.poifs.filesystem.POIFSFileSystem.
at org.apache.poi.hssf.usermodel.HSSFWorkbook.
at org.apache.poi.hssf.usermodel.HSSFWorkbook.
at com.test.ReadWriteExcelFile.readXLSFile(ReadWriteExcelFile.java:24)
at com.test.ReadWriteExcelFile.main(ReadWriteExcelFile.java:163)
Solution :Check the excel file type, whether its xls or xlsx and call appropriate method as shown in above program
6. Exception in thread 'main' java.lang.IllegalStateException: Cannot get a text value from a numeric cell
at org.apache.poi.xssf.usermodel.XSSFCell.typeMismatch(XSSFCell.java:845)
at org.apache.poi.xssf.usermodel.XSSFCell.getRichStringCellValue(XSSFCell.java:294)
at org.apache.poi.xssf.usermodel.XSSFCell.getStringCellValue(XSSFCell.java:246)
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at com.test.ReadWriteExcelFile.readXLSXFile(ReadWriteExcelFile.java:121)
at com.test.ReadWriteExcelFile.main(ReadWriteExcelFile.java:167)
Solution: Check for cell.getCellType(). if HSSFCell.CELL_TYPE_STRING then call cell.getStringCellValue(), if HSSFCell.CELL_TYPE_NUMERIC then call cell.getNumericCellValue() and so on.
| Developer(s) | Apache Software Foundation |
|---|---|
| Stable release | |
| Repository | |
| Operating system | Cross-platform |
| Type | API to access Microsoft Officeformats |
| License | Apache License 2.0 |
| Website | https://poi.apache.org |
Apache POI, a project run by the Apache Software Foundation, and previously a sub-project of the Jakarta Project, provides pure Java libraries for reading and writing files in Microsoft Officeformats, such as Word, PowerPoint and Excel.
- 1History and roadmap
History and roadmap[edit]
The name was originally an acronym for 'Poor Obfuscation Implementation',[2] referring humorously to the fact that the file formats seemed to be deliberately obfuscated, but poorly, since they were successfully reverse-engineered. This explanation – and those of the similar names for the various sub-projects – were removed from the official web pages in order to better market the tools to businesses who would not consider such humor appropriate. The original authors (Andrew C. Oliver and Marc Johnson) also noted the existence of the Hawaiian poi dish, made of mashed taro root, which had similarly derogatory connotations.[3]
Office Open XML support[edit]
POI supports the ISO/IEC 29500:2008 Office Open XML file formats since version 3.5. A significant contribution for OOXML support came from Sourcesense,[4] an open source company which was commissioned by Microsoft to develop this contribution.[5] This link spurred controversy, some POI contributors questioning POI OOXML patent protection regarding Microsoft's Open Specification Promise patent license.[6]
Architecture[edit]
The Apache POI project contains the following subcomponents (meaning of acronyms is taken from old documentation):
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- POIFS (Poor Obfuscation Implementation File System[2]) – This component reads and writes Microsoft's OLE 2Compound document format. Since all Microsoft Office files are OLE 2 files, this component is the basic building block of all the other POI elements. POIFS can therefore be used to read a wider variety of files, beyond those whose explicit decoders are already written in POI.
- HSSF (Horrible SpreadSheet Format[2]) – reads and writes Microsoft Excel (XLS) format files. It can read files written by Excel 97 onwards; this file format is known as the BIFF 8 format. As the Excel file format is complex and contains a number of tricky characteristics, some of the more advanced features cannot be read.
- XSSF (XML SpreadSheet Format) – reads and writes Office Open XML (XLSX) format files. Similar feature set to HSSF, but for Office Open XML files.
- HPSF (Horrible Property Set Format[2]) – reads 'Document Summary' information from Microsoft Office files. This is essentially the information that one can see by using the File|Properties menu item within an Office application.
- HWPF (Horrible Word Processor Format[7]) – aims to read and write Microsoft Word 97 (DOC) format files. This component is in initial stages of development.
- XWPF (XML Word Processor Format[7]) – similar feature set to HWPF, but for Office Open XML files.
- HSLF (Horrible Slide Layout Format[7]) – a pure Java implementation for Microsoft PowerPoint files. This provides the ability to read, create and edit presentations (though some things are easier to do than others)
- HDGF (Horrible DiaGram Format[7]) – an initial pure Java implementation for Microsoft Visio binary files. It provides an ability to read the low level contents of the files.
- HPBF (Horrible PuBlisher Format[citation needed]) – a pure Java implementation for Microsoft Publisher files.[8]
- HSMF (Horrible Stupid Mail Format[9]) – a pure Java implementation for Microsoft Outlook MSG files.[10]
- DDF (Dreadful Drawing Format[7]) – a package for decoding the Microsoft Office Drawing format.
The HSSF component is the most advanced feature of the library.[11] Other components (HPSF, HWPF, and HSLF) are usable, but less full-featured.[12][13]
The POI library is also provided as a Ruby[14] or ColdFusion extension.
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There are modules for Big Data platforms (e.g. Apache Hive/Apache Flink/Apache Spark), which provide certain functionality of Apache POI, such as the processing of Excel files.[15][16]
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Version history[edit]
| Legend: | Old version, no support | Older version, still supported | Current stable version | Latest preview version | Future release |
|---|
Version number | Date of release |
|---|---|
| Current stable version:4.1.0 | 09. April 2019 |
| Older version, yet still supported: 4.0.0 | 07. September 2018 |
| Older version, yet still supported: 3.17 | 15. September 2017 |
| Older version, yet still supported: 3.16 | 19. April 2017 |
| Older version, yet still supported: 3.15 | 21. September 2016 |
| Older version, yet still supported: 3.14 | 2. March 2016 |
| Older version, yet still supported: 3.13 | 29. September 2015 |
| Older version, yet still supported: 3.12 | 11. May 2015 |
| Older version, yet still supported: 3.11 | 21. December 2014 |
| Older version, yet still supported: 3.10.1 | 18. August 2014 |
| Old version, no longer supported: 3.10 | 8. February 2014 |
| Old version, no longer supported: 3.9 | 3. December 2012 |
| Old version, no longer supported: 3.8 | 26. March 2012 |
| Old version, no longer supported: 3.7 | 29. October 2010 |
| Old version, no longer supported: 3.6 | 14. December 2009 |
| Old version, no longer supported: 3.5 | 28. September 2009 |
| Old version, no longer supported: 3.2 | 19. October 2008 |
| Old version, no longer supported: 3.1 | 29. June 2008 |
| Old version, no longer supported: 3.0.2 | 4. February 2008 |
| Old version, no longer supported: 3.0.1 | 5. July 2007 |
| Old version, no longer supported: 3.0 | 18. May 2007 |
| Old version, no longer supported: 2.5.1 | 29. February 2004 |
| Old version, no longer supported: 2.5 | 29. February 2004 |
| Old version, no longer supported: 2.0 | 26. January 2004 |
| Old version, no longer supported: 1.5.1 | 16. June 2002 |
| Old version, no longer supported: 1.5 | 6. May 2002 |
| Old version, no longer supported: 1.2.0 | 19. January 2002 |
| Old version, no longer supported: 1.1.0 | 4. January 2002 |
| Old version, no longer supported: 1.0.2 | 11. January 2002 |
| Old version, no longer supported: 1.0.1 | 4. January 2002 |
| Old version, no longer supported: 1.0.0 | 30. December 2001 |
See also[edit]
References[edit]
- ^'[ANNOUNCE] Apache POI 4.1.0 released'. 2019-04-09. Retrieved 2019-06-08.
- ^ abcdSundaram, Elango (2004-03-22), Excelling in Excel with Java, Java World
- ^POI homepage from October 2004, Coyote Song, archived from the original on 2004-10-15, showing original explanations for naming.
- ^SourceSense
- ^'Microsoft Eyes Open Source Components for Office 2007'. Information Week. 26 March 2008. Retrieved 1 March 2009.
- ^POI development mailing list archives, March 2008
- ^ abcde'POI API Documentation'. Poi.apache.org. Retrieved 2019-03-07.
- ^'POI-HPBF - Java API To Access Microsoft Publisher Format Files'. Poi.apache.org. Retrieved 2019-03-07.
- ^Codeplex NPOI, Microsoft, archived from the original on 2012-03-28[better source needed]
- ^POI-HSMF, Apache, archived from the original on 2011-08-07, retrieved 2011-07-31
- ^POI-HSSF, Apache
- ^POI-HWPF, Apache
- ^POI-HSLF, Apache
- ^POI-Ruby, Apache
- ^'HadoopOffice for Hive/Flink/Spark'. Github.com. 2018-07-19. Retrieved 2019-03-07.
- ^'Spark Excel'. Github.com. Retrieved 2019-03-07.
External links[edit]
- Official website