java导出mysql到excel

import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExportToExcel {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";
        String sql = "SELECT * FROM mytable";

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery(sql);
             Workbook workbook = new XSSFWorkbook();
             Sheet sheet = workbook.createSheet("Data")) {

            int rowIndex = 0;
            while (rs.next()) {
                Row row = sheet.createRow(rowIndex++);
                for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
                    Cell cell = row.createCell(i - 1);
                    cell.setCellValue(rs.getString(i));
                }
            }

            try (FileOutputStream fileOut = new FileOutputStream("data.xlsx")) {
                workbook.write(fileOut);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}