Apache poi

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Short presentation about Apache POI basics for English classes (SoftServe University)

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Apache poi

  1. 1. Apache POI the Java API for Microsoft Documents
  2. 2. AGENDA • What is Apache POI? • How to use Apache POI? • Demo 
  3. 3. WHAT APACHE POI STANDS FOR? Poor Obfuscation Implementation  Provides pure Java libraries for reading and writing files in Microsoft Office formats
  4. 4. APACHE POI CAPABILITIES Component APIs • Excel (SS=HSSF+XSSF) • Word (HWPF+XWPF) • PowerPoint (HSLF+XSLF) • Outlook (HSMF) • Visio (HDGF) • Publisher (HPBF)
  5. 5. WHAT IS APACHE POI • Java library, part of Jakarta Project • Open Source • Supports ©Microsoft ™® proprietary document formats
  6. 6. WHERE IT IS? • Download: http://poi.apache.org/download.html • Maven: <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.9</version> </dependency>
  7. 7. HOW TO USE IT? //Create workbook XSSFWorkbook workbook = new XSSFWorkbook(); //Create a blank sheet XSSFSheet sheet = workbook.createSheet("Employee Data"); //Prepare data to be written (Object[]) Map<String, Object[]> data = new TreeMap<String, Object[]>(); data.put("1", new Object[] {"ID", "NAME", "LASTNAME"}); data.put("2", new Object[] {1, “Volodymyr", “Ostapiv"}); Let’s write some data into excel file…
  8. 8. HOW TO USE IT? //Don’t forget to write the workbook FileOutputStream out = new FileOutputStream( new File(“test.xlsx")); workbook.write(out); //Iterate over data and write to sheet Set<String> keyset = data.keySet(); int rownum = 0; for (String key : keyset) { Row row = sheet.createRow(rownum++); Object [] objArr = data.get(key); int cellnum = 0; for (Object obj : objArr) { Cell cell = row.createCell(cellnum++); cell.setCellValue((String)obj); } }
  9. 9. HOW TO USE APACHE POI • Downloadable JAR file • Maven/Graddle support • Usage example
  10. 10. SO BORING…
  11. 11. HOW ABOUT HAVING FUN?
  12. 12. WHERE ENGINEERING BECOMES ART http://poi-painter.akceptor-kindle.cloudbees.net/
  13. 13. WE DID IT! • Apache POI is… • Usage examples • Artistic demo 
  14. 14. FINALLY Apache POI: use it not only for work, but as well for art!
  15. 15. My article about Apache POI: http://habrahabr.ru/post/180489/ Sources: https://github.com/Akceptor/POIPainter
  16. 16. My article about Apache POI: http://habrahabr.ru/post/180489/ Sources: https://github.com/Akceptor/POIPainter

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