java导出excel数据量大压缩包

如果你需要处理大量数据并将其导出为Excel文件，可以使用Java的Apache POI库。而如果你想将导出的Excel文件进行压缩，可以使用Java的ZipOutputStream类来创建压缩包。

以下是一个示例代码，它使用Apache POI库将数据导出为Excel文件，并使用ZipOutputStream类将其压缩：

import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelZipExporter {

    public static void main(String[] args) {
        String[] headers = {"Name", "Age", "Email"};
        Object[][] data = {{"John", 25, "john@example.com"}, {"Mary", 30, "mary@example.com"}};

        try (ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream("data.zip"));
             XSSFWorkbook workbook = new XSSFWorkbook()) {

            Sheet sheet = workbook.createSheet("Data");

            Row headerRow = sheet.createRow(0);
            for (int i = 0; i < headers.length; i++) {
                Cell cell = headerRow.createCell(i);
                cell.setCellValue(headers[i]);
            }

            for (int rowIndex = 1; rowIndex <= data.length; rowIndex++) {
                Row row = sheet.createRow(rowIndex);
                for (int colIndex = 0; colIndex < data[rowIndex - 1].length; colIndex++) {
                    Cell cell = row.createCell(colIndex);
                    cell.setCellValue(data[rowIndex - 1][colIndex].toString());
                }
            }

            // Write Excel file
            workbook.write(new FileOutputStream("data.xlsx"));

            // Add Excel file to ZIP archive
            ZipEntry zipEntry = new ZipEntry("data.xlsx");
            zipOut.putNextEntry(zipEntry);
            byte[] buffer = new byte[1024];
            int length;
            try (FileInputStream fis = new FileInputStream("data.xlsx")) {
                while ((length = fis.read(buffer)) > 0) {
                    zipOut.write(buffer, 0, length);
                }
            }
            zipOut.closeEntry();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

该代码将数据导出为Excel文件，并将其添加到名为“data.xlsx”的ZIP文件中。你可以通过修改数据数组来添加更多数据并导出更大的Excel文件。