在excel Apache poi java中为合并的单元格添加边框.？

Question

我正在使用Apache POI,我需要在一系列单元格或合并区域中放置边框.我正在将这些单元格合并为三行五列.但是我无法为它添加边框.那我该怎么做？

Answer 1

我的解决方案是按位置合并单元格,然后创建一个单元格(引用合并单元格的第一个块)以分配值,然后通过HSSFRegionUtil设置边框

// Merges the cells
CellRangeAddress cellRangeAddress = new CellRangeAddress(start, start, j, j + 1);
sheet.addMergedRegion(cellRangeAddress);

// Creates the cell
Cell cell = CellUtil.createCell(row, j, entry.getKey());

// Sets the borders to the merged cell
HSSFRegionUtil.setBorderTop(CellStyle.BORDER_MEDIUM, cellRangeAddress, sheet, workbook);
HSSFRegionUtil.setBorderLeft(CellStyle.BORDER_MEDIUM, cellRangeAddress, sheet, workbook);
HSSFRegionUtil.setBorderRight(CellStyle.BORDER_MEDIUM, cellRangeAddress, sheet, workbook);
HSSFRegionUtil.setBorderBottom(CellStyle.BORDER_THIN, cellRangeAddress, sheet, workbook);

Answer 2

您会发现RegionUtil类可用于设置一系列单元格的边框.请点击此处:

http://poi.apache.org/apidocs/index.html

Answer 3

首先,了解您尝试创建哪种表格格式会很高兴.因为当您在HSSF中合并空单元格时,这是完全正常的,而XSSF创建格式错误的文件,在Microsoft EXCEL中打开它时会导致错误.在两种情况下,样式往往表现相同.您需要为要合并的每个单元格指定相同的样式(在包含边框的案例样式中).我的建议创建一个检查和纠正的函数,为合并区域中的所有单元格设置样式.这是我自己的例子:

private static final XSSFColor COLOR_ORANGE         = new XSSFColor(new java.awt.Color(254, 253, 189));
private static final XSSFColor COLOR_GREY           = new XSSFColor(new java.awt.Color(191, 190, 154));

...

        XSSFCellStyle styleSubHeader = (XSSFCellStyle) wb.createCellStyle();
        styleSubHeader.setFont(fontBold);
        styleSubHeader.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
        styleSubHeader.setAlignment(CellStyle.ALIGN_CENTER);
        styleSubHeader.setFillForegroundColor(COLOR_ORANGE);
        styleSubHeader.setFillPattern(CellStyle.SOLID_FOREGROUND);
        styleSubHeader.setBorderBottom(CellStyle.BORDER_THIN);
        styleSubHeader.setBottomBorderColor(COLOR_GREY);
        styleSubHeader.setBorderLeft(CellStyle.BORDER_THIN);
        styleSubHeader.setLeftBorderColor(COLOR_GREY);
        styleSubHeader.setBorderRight(CellStyle.BORDER_THIN);
        styleSubHeader.setRightBorderColor(COLOR_GREY);
        styleSubHeader.setBorderTop(CellStyle.BORDER_THIN);
        styleSubHeader.setTopBorderColor(COLOR_GREY);

...

 /**
 * Checking if every row and cell in merging region exists, and create those which are not    
 * @param sheet in which check is performed
 * @param region to check
 * @param cellStyle cell style to apply for whole region
 */
private void cleanBeforeMergeOnValidCells(XSSFSheet sheet,CellRangeAddress region, XSSFCellStyle cellStyle )
{
    for(int rowNum =region.getFirstRow();rowNum<=region.getLastRow();rowNum++){
        XSSFRow row= sheet.getRow(rowNum);
        if(row==null){
            sheet.createRow(rowNum);
            logger.trace("while check row "+rowNum+" was created");
        }
        for(int colNum=region.getFirstColumn();colNum<=region.getLastColumn();colNum++){
            XSSFCell currentCell = row.getCell(colNum); 
           if(currentCell==null){
               currentCell = row.createCell(colNum);
               logger.trace("while check cell "+rowNum+":"+colNum+" was created");
           }    

           currentCell.setCellStyle(cellStyle);

        }
    }


}

最后你在实际的合并调用之前调用它,如下所示:

CellRangeAddress region = new CellRangeAddress(rowIndex, rowIndex, mergeStart, cellIndex+cellOffset);
cleanBeforeMergeOnValidCells(row.getSheet(),region,styleSubHeader );
row.getSheet().addMergedRegion(region);// merging cells that has a title name

希望能帮助到你.

Answer 4

我建议您使用 getMergedRegions，该方法将返回工作表中合并区域的列表。然后您可以迭代每个区域以应用边框。例如：

private void setBordersToMergedCells(Workbook workBook, Sheet sheet) {
  List<CellRangeAddress> mergedRegions = sheet.getMergedRegions();
  for (CellRangeAddress rangeAddress : mergedRegions) {
    RegionUtil.setBorderTop(CellStyle.BORDER_THIN, rangeAddress, sheet, workBook);
    RegionUtil.setBorderLeft(CellStyle.BORDER_THIN, rangeAddress, sheet, workBook);
    RegionUtil.setBorderRight(CellStyle.BORDER_THIN, rangeAddress, sheet, workBook);
    RegionUtil.setBorderBottom(CellStyle.BORDER_THIN, rangeAddress, sheet, workBook);
  }
}

然后，您可以在完成 mySheet 中所需的所有合并后调用此方法。

Answer 5

    cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
    cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
    cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
    cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
    cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
    cellStyle.setBottomBorderColor(IndexedColors.BLACK.getIndex());
    cellStyle.setTopBorderColor(IndexedColors.BLACK.getIndex());
    cellStyle.setLeftBorderColor(IndexedColors.BLACK.getIndex());
    cellStyle.setRightBorderColor(IndexedColors.BLACK.getIndex());