Adding border to a merged region in POI XSSF workbook

Question

I\'m using apache poi 3.7 and I need to put border to a range of cells or merged region.

how can I to apply border to a merged region when the sheet and workbook type is

Answer 1

private void setBordersToMergedCells(XSSFWorkbook workBook, XSSFSheet sheet) {
        int numMerged = sheet.getNumMergedRegions();

    for(int i= 0; i