写一个java分批导出excel代码
时间: 2023-06-04 11:06:20 浏览: 142
好的,我可以为您提供Java分批导出Excel的代码。以下是代码示例:
```
public class ExcelExporter {
private static final int BATCH_SIZE = 1000;
public void exportToExcel(List<MyDataObject> data, String filePath) {
try (Workbook workbook = new XSSFWorkbook()) {
Sheet sheet = workbook.createSheet("Data");
int rowNum = 0;
// Create header row
Row headerRow = sheet.createRow(rowNum++);
headerRow.createCell(0).setCellValue("ID");
headerRow.createCell(1).setCellValue("Name");
headerRow.createCell(2).setCellValue("Age");
headerRow.createCell(3).setCellValue("Email");
// Create data rows
int batchCount = 0;
for (MyDataObject obj : data) {
if (batchCount == BATCH_SIZE) {
batchCount = 0;
writeFile(workbook, filePath);
}
Row row = sheet.createRow(rowNum++);
row.createCell(0).setCellValue(obj.getId());
row.createCell(1).setCellValue(obj.getName());
row.createCell(2).setCellValue(obj.getAge());
row.createCell(3).setCellValue(obj.getEmail());
batchCount++;
}
// Write last batch of data to file
writeFile(workbook, filePath);
} catch (IOException e) {
e.printStackTrace();
}
}
private void writeFile(Workbook workbook, String filePath) {
try (FileOutputStream outputStream = new FileOutputStream(filePath)) {
workbook.write(outputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
}
```
请注意,本示例仅仅是演示如何实现Java分批导出Excel的,您需要将MyDataObject替换为您的数据对象,并且根据您的需要修改BATCH_SIZE和文件路径等参数。