多线程批量导出数据到Excel java代码实现

这个问题属于技术问题，我可以为您提供一些实现方案。您可以使用Apache POI库来导出Excel文件，同时使用Java多线程技术提高导出效率。具体实现可以参考以下代码示例：

import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;

public class ExcelExportUtil {

  public static void exportDataToExcel(List<Data> dataList, int sheetSize, String filePath) {
    SXSSFWorkbook wb = new SXSSFWorkbook();
    Sheet sh = null;
    Row row = null;
    int rowIndex = 0;

    ExecutorService threadPool = Executors.newFixedThreadPool(sheetSize);

    for (int i = 0; i < dataList.size(); i++) {
      Data data = dataList.get(i);
      if (i % sheetSize == 0) {
        sh = wb.createSheet("Sheet " + (i / sheetSize + 1));
        row = sh.createRow(rowIndex++);
        // create header
        row.createCell(0).setCellValue("Column 1");
        row.createCell(1).setCellValue("Column 2");
        row.createCell(2).setCellValue("Column 3");
      }

      // create data rows
      row = sh.createRow(rowIndex++);
      row.createCell(0).setCellValue(data.getColumn1());
      row.createCell(1).setCellValue(data.getColumn2());
      row.createCell(2).setCellValue(data.getColumn3());
    }

    // write excel to file
    try (FileOutputStream fos = new FileOutputStream(filePath)) {
      wb.write(fos);
    } catch (Exception e) {
      e.printStackTrace();
    }

    // shutdown thread pool
    threadPool.shutdown();
  }

  static class Data {
    private String column1;
    private String column2;
    private String column3;

    public Data(String column1, String column2, String column3) {
      this.column1 = column1;
      this.column2 = column2;
      this.column3 = column3;
    }

    public String getColumn1() {
      return column1;
    }

    public String getColumn2() {
      return column2;
    }

    public String getColumn3() {
      return column3;
    }
  }

  public static void main(String[] args) {
    // generate test data
    List<Data> dataList = new ArrayList<>();
    for (int i = 1; i <= 10000; i++) {
      dataList.add(new Data("Data " + i, "Value " + i, "Item " + i));
    }

    // export data to excel
    exportDataToExcel(dataList, 1000, "test.xlsx");
  }
}