In enterprise applications, working with Excel files is a common requirement. Whether it’s financial reporting, sales analysis, or data consolidation, merging Excel files is an essential task. Different business scenarios require different merging strategies. Here are some typical Excel merging scenarios: File-level merging: Combine multiple Excel files into a single workbook. Worksheet-level merging: Consolidate multiple worksheets into a single sheet. Batch merging: Merge all Excel files within a folder. Header-aligned merging: Merge data from files with inconsistent headers into a unified format. Below, we’ll introduce several practical ways to merge Excel files in Java according to these scenarios.…