我正在使用Apache POI,需要在一系列单元格或合并区域中添加边框。我正在合并具有三行五列的单元格,但是无法为其添加边框。那么我该如何做到这一点呢?
我正在使用Apache POI,需要在一系列单元格或合并区域中添加边框。我正在合并具有三行五列的单元格,但是无法为其添加边框。那么我该如何做到这一点呢?
我的解决方案是根据它们的位置合并单元格,然后创建一个单元格(引用合并单元格的第一个块),分配一个值,并通过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);
首先,很好知道您正在尝试创建哪种工作表格式。因为当您在HSSF中合并空单元格时,这是完全正常的,而XSSF则会创建格式不正确的文件,在Microsoft EXCEL中打开时会导致错误。在两种情况下,样式倾向于表现相同。您需要为要合并的每个单元格分配相同的样式(在您的情况下包括边框的样式)。我建议创建一个检查和纠正功能,将样式设置为合并区域中的所有单元格。
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,在实际执行合并操作之前,您需要调用类似以下代码的函数:
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
希望对你有所帮助。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);
}
}
使用:
int rownumm=0;
rownumm++;
Row row = sheet.createRow(rownumm);
Cell cell = row.createCell(0);
cell.setCellValue(web.getUrl());
cell.setCellStyle(styles.get("font"));//font for text
CellRangeAddress region = CellRangeAddress.valueOf("$A$"+ (rownumm) + ":$E$+" + (rownumm));
frame(region, sheet, wb);
并使用方法:
private static void frame(CellRangeAddress region,Sheet sheet, Workbook wb){
sheet.addMergedRegion(region);
final short borderMediumDashed = CellStyle.BORDER_MEDIUM;
RegionUtil.setBorderBottom(borderMediumDashed, region, sheet, wb);
RegionUtil.setBorderTop(borderMediumDashed, region, sheet, wb);
RegionUtil.setBorderLeft(borderMediumDashed, region, sheet, wb);
RegionUtil.setBorderRight(borderMediumDashed, region, sheet, wb);
}
https://poi.apache.org/spreadsheet/quick-guide.html#FooterPageNumbers
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());
// Defining and merging the cells
CellRangeAddress cellRangeAddress = new CellRangeAddress(start, start, j, j + 1);
sheet.addMergedRegion(cellRangeAddress);
// Adding a border to the cell
RegionUtil.setBorderTop(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderBottom(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderLeft(BorderStyle.THIN, cellRangeAddress, sheet);
RegionUtil.setBorderRight(BorderStyle.THIN, cellRangeAddress, sheet);