使用带有 Spring 的 Apache POI 在 Excel 中读取合并单元格

Question

我正在构建一个读取 excel 文件中可用数据的函数。

我在 Spring 项目中使用 Apache POI。

但是，我在阅读合并单元格时遇到了问题。我需要的是使内容以红色突出显示，如图所示。

你能给我推荐一下代码吗？

谢谢！

更新：

`

public void importClassroomByExcel(MultipartFile file) {
        try {
            Workbook workbook = new HSSFWorkbook(file.getInputStream());
            Iterator<Sheet> sheetIterator = workbook.iterator();
            while (sheetIterator.hasNext()) {
                Sheet sheet = sheetIterator.next();
                String title = sheet.getRow(4).getCell(5).toString();

            }
            workbook.close();
        } catch (Exception e) {
            throw new BadRequestAlertException(ErrorConstants.DEFAULT_TYPE, "", e.getMessage(), "filestructerror",
                    Status.BAD_REQUEST);
        }
    }

`

Answer 1

不确定我是否理解您的要求是否正确。这就是我认为您想要的：在您的工作表中，数据范围从第 5 行开始，A 列确定分组。现在需要获取每个组的 F 和 G 列的值。然后需要获取 N 列中每个组的第一个日期和 O 列中每个组的最后一个日期。

因此需要获取每个组的第一行和每个组的最后填充行。以下示例显示了这一点。主要是它使用int getNextFilledRow(Sheet sheet, int columnNum, int startRowNum) 方法从给定行号开始获取工作表给定列中的下一个填充行。

代码应该只获取给定工作表中带有红色标记内容的单元格。

import java.io.FileInputStream;
import org.apache.poi.ss.usermodel.*;

class ReadExcelMergedCells {

 static int getNextFilledRow(Sheet sheet, int columnNum, int startRowNum) {
  int lastRow = sheet.getLastRowNum();
  int nextFilledRow = lastRow;
  for (int r = startRowNum; r <= lastRow; r++) {
   nextFilledRow = r + 1; 
   Row row = sheet.getRow(nextFilledRow);
   Cell cell = (row != null)?cell = row.getCell(columnNum):null;
   if (cell != null && cell.getCellType() != CellType.BLANK) {
    break;
   }
  }
  return nextFilledRow;
 }

 public static void main(String[] args) throws Exception {
  Workbook workbook = WorkbookFactory.create(new FileInputStream("./Excel.xlsx"));
  Sheet sheet = workbook.getSheetAt(0);
  int lastRow = sheet.getLastRowNum();
  int startRow = 4;
  Row row = null;
  Cell cell = null;
  int columnNum = -1;
  int columNumA = 0; //column A determines the grouping
  for (int r = startRow; r <= lastRow; r = getNextFilledRow(sheet, columNumA, r)) {
   //r is the first row in this group
System.out.println("Group starting in row " + r);

   //get cell in column F of first row in this group
   columnNum = 5;
   row = sheet.getRow(r);
   cell = (row != null)?cell = row.getCell(columnNum):null;
System.out.println(cell);

   //get cell in column G of first row in this group
   columnNum = 6;
   row = sheet.getRow(r);
   cell = (row != null)?cell = row.getCell(columnNum):null;
System.out.println(cell);

   //get cell in column N of first row in this group
   columnNum = 13;
   row = sheet.getRow(r);
   cell = (row != null)?cell = row.getCell(columnNum):null;
System.out.println(cell);

   //get cell in column O of last filled row in this group
   columnNum = 14;
   int lastRowInGroup = getNextFilledRow(sheet, columNumA, r) -1;
   // get last filled cell in this group
   for (int rl = lastRowInGroup; rl >= r; rl--) {
    row = sheet.getRow(rl);
    cell = (row != null)?cell = row.getCell(columnNum):null;
    if (cell != null && cell.getCellType() != CellType.BLANK) {
     break;
    }
   }
System.out.println(cell);

System.out.println("Group ending in row " + lastRowInGroup);

  }

  workbook.close();
 }
}

Answer 2

将单元格颜色更改为红色的代码：

    CellStyle cellStyle = cell.getCellStyle();
    Font font = workbook.createFont();

    font.setFontName("Times New Roman");
    font.setColor(IndexedColors.RED.index);

    cellStyle.setFont(font);
    cellStyle.setFillBackgroundColor(IndexedColors.BLUE.index);

    cell.setCellStyle(cellStyle);

从 B2 合并到 E2：

sheet.addMergedRegion(new CellRangeAddress(1,1,1,4));

查看更多：

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• Merging cells in Excel using Apache POI