Understanding Workbook ImplementationsApache POI provides distinct classes for handling different Excel versions. For the older binary format (Excel 2003, .xls), the library uses HSSFWorkbook. For the newer XML-based format (Excel 2007 and later, .xlsx), XSSFWorkbook is required. Both classes implem...
When working with generated spreadsheets, you may need to merge neighboring cells that hold the same value to improve clarity. Apache POI provides a straightforwrad way to accomplish this in Java. Below is a complete example demonstrating how to create an Excel file, populate it with data, and dynam...
Reading Excel Files with Different Headers in Java In daily work, we often encounter the need to read Excel files and process data. However, sometimes we face Excel files with different headers, requiring us to dynamically read data based on the headers. This article introduces how to read Excel fil...
Fetching external spreadsheet documents requires establishing a network connection, parsing the binary stream into an in-memory structure, applying targeted data transformations, and transmitting the revised bytes back to the requester. The implementation below retrieves an Excel file from a remote...
Add the following dependencies to your Maven configuration: <dependencies> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>5.2.3</version> </dependency> </dependencies> The following implementation...