java 将多个sheet页合并成一个sheet页
时间: 2023-10-15 16:02:38 浏览: 51
可通过使用 Apache POI 库来实现。首先,你需要创建一个新的 workbook 和 sheet,然后使用循环逐个复制每个 sheet 的行和单元格到新的 sheet 中。以下是一个简单的代码示例:
```java
// 创建新的 workbook 和 sheet
Workbook newWorkbook = new XSSFWorkbook();
Sheet newSheet = newWorkbook.createSheet("Merged");
// 初始化变量
int rowCount = 0;
// 获取原始 workbook
Workbook oldWorkbook = WorkbookFactory.create(new FileInputStream("path/to/your/file.xlsx"));
// 遍历每个 sheet
for (int i = 0; i < oldWorkbook.getNumberOfSheets(); i++) {
Sheet oldSheet = oldWorkbook.getSheetAt(i);
// 遍历每行并复制到新的 sheet
for (int j = 0; j <= oldSheet.getLastRowNum(); j++) {
Row oldRow = oldSheet.getRow(j);
Row newRow = newSheet.createRow(rowCount++);
// 遍历每个单元格并复制到新的行中
for (int k = 0; k < oldRow.getLastCellNum(); k++) {
Cell oldCell = oldRow.getCell(k);
Cell newCell = newRow.createCell(k);
// 根据单元格类型复制单元格
switch (oldCell.getCellTypeEnum()) {
case STRING:
newCell.setCellValue(oldCell.getStringCellValue());
break;
case NUMERIC:
newCell.setCellValue(oldCell.getNumericCellValue());
break;
case BOOLEAN:
newCell.setCellValue(oldCell.getBooleanCellValue());
break;
case FORMULA:
newCell.setCellFormula(oldCell.getCellFormula());
break;
}
}
}
}
// 保存新的 workbook
FileOutputStream outputStream = new FileOutputStream("path/to/your/new/file.xlsx");
newWorkbook.write(outputStream);
outputStream.close();
```