Get the Cell type by calling getCellType() method.

Get a Row from that sheet by calling getRow() method, you can pass index.

Get a Sheet from workbook by calling getSheet() method, you can pass name or sheet index.Create an object of HSSFWorkBook by opening excel file using FileInputStream.These steps are fine for writing String and Numeric values but in order to write date values into Excel file, you need to follow following more steps : Close the workbook object by calling close() method.Write workbook content into File using FileOutputStream object.Set value to that cell by calling setCellValue() method.Create a Cell by calling createCell() method.Create a Row on that sheet by calling createRow() method.Create a Sheet on that workbook by calling createSheet() method.Include poi-3.12.jar in your Java program's classpath.Steps to write Data into XLS file in Java Don't download just POI jar, always include transitive dependency. PPT format, while poi-ooxml.jar is to read XLSX, DOCX and. This will download whole bundle so you don't need to worry, but make sure it contains following JAR files if your application is going to support both XLS and XLSX format. If you are more comfortable by downloading JAR files by yourself, you can download Apache POI JARS from here . For example, I have just specified Apache POI JAR files but Maven will also download xmlbeans-2.6.0.jar, stax-api-1.0.1.jar, poi-ooxml-schemas-3.12.jar and commons-codec-1.9.jar. JARS on which POI library is internally dependent. poi.jar and poi-ooxml.jar but also download transitive dependency e.g. Main advantage of using Maven is that it not only downloads direct dependency e.g. If you are using Maven then include following two dependencies to use Apache POI in your Java program : In order to use this library either you need to download POI JAR files and add into your Eclipse's build path manually or you can use Maven to download dependency for you.

You can read both types of Excel file format using this library. JXL, the most feature rich and most popular one is Apache POI library. Though there are couple of open source library available to read and write from Excel file in Java e.g. Apache POI JARs to Read/Write Excel File in Java

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