为 POI 中的合并单元格创建边框 [英] Creating the border for the merged cells in POI

问题描述

谁能解释一下如何使用 Apache POI 为合并的单元格创建边框?
我使用的代码只影响一个单元格.

Could anyone explain me how to create the borders for the merged cells using Apache POI?
The Code I'm using is only affecting one cell.

sheet.addMergedRegion(new CellRangeAddress(1, 1, 2, 3));
Cell monthCell = subheaderRow.createCell(2);
monthCell.setCellValue(2);
monthCell.setCellStyle(styles.get("month"));



style = wb.createCellStyle();

style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBorderTop(CellStyle.BORDER_THIN);
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setBorderRight(CellStyle.BORDER_THIN);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
// style.setFillForegroundColor(IndexedColors.DARK_BLUE.getIndex());
// style.setFillPattern(CellStyle.SOLID_FOREGROUND);
// style.setFont(monthFont);
styles.put("month", style);

推荐答案

这可以如下完成:

public void doMerge(int rowIndex, int columnIndex, int rowSpan, int columnSpan) {
    Cell cell = sheet.getRow(rowIndex).getCell(columnIndex);
    CellRangeAddress range = new CellRangeAddress(rowIndex, rowIndex + rowSpan - 1, columnIndex, columnIndex
            + columnSpan - 1);

    sheet.addMergedRegion(range);

    RegionUtil.setBorderBottom(cell.getCellStyle().getBorderBottom(), range, sheet, sheet.getWorkbook());
    RegionUtil.setBorderTop(cell.getCellStyle().getBorderTop(), range, sheet, sheet.getWorkbook());
    RegionUtil.setBorderLeft(cell.getCellStyle().getBorderLeft(), range, sheet, sheet.getWorkbook());
    RegionUtil.setBorderRight(cell.getCellStyle().getBorderRight(), range, sheet, sheet.getWorkbook());

    RegionUtil.setBottomBorderColor(cell.getCellStyle().getBottomBorderColor(), range, sheet, sheet.getWorkbook());
    RegionUtil.setTopBorderColor(cell.getCellStyle().getTopBorderColor(), range, sheet, sheet.getWorkbook());
    RegionUtil.setLeftBorderColor(cell.getCellStyle().getLeftBorderColor(), range, sheet, sheet.getWorkbook());
    RegionUtil.setRightBorderColor(cell.getCellStyle().getRightBorderColor(), range, sheet, sheet.getWorkbook());
}

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