java代码 将excel导入mysql

以下是将Excel表格导入MySQL数据库的Java代码示例：

import java.io.File;
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Iterator;
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.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelToMysql {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/test"; //数据库URL
        String username = "root"; //数据库用户名
        String password = "123456"; //数据库密码
        String driverName = "com.mysql.jdbc.Driver"; //JDBC驱动名

        Connection conn = null;
        PreparedStatement ps = null;

        try {
            //加载JDBC驱动
            Class.forName(driverName);

            //获取数据库连接
            conn = DriverManager.getConnection(url, username, password);

            //创建PreparedStatement对象
            String sql = "INSERT INTO students (id, name, age, gender) VALUES (?, ?, ?, ?)";
            ps = conn.prepareStatement(sql);

            //读取Excel文件
            File file = new File("students.xlsx");
            FileInputStream fis = new FileInputStream(file);
            Workbook workbook = new XSSFWorkbook(fis);
            Sheet sheet = workbook.getSheetAt(0);

            //遍历Excel表格
            Iterator<Row> rowIterator = sheet.iterator();
            while (rowIterator.hasNext()) {
                Row row = rowIterator.next();
                Iterator<Cell> cellIterator = row.cellIterator();

                while (cellIterator.hasNext()) {
                    Cell cell = cellIterator.next();
                    int columnIndex = cell.getColumnIndex();

                    switch (columnIndex) {
                        case 0:
                            ps.setInt(1, (int) cell.getNumericCellValue());
                            break;
                        case 1:
                            ps.setString(2, cell.getStringCellValue());
                            break;
                        case 2:
                            ps.setInt(3, (int) cell.getNumericCellValue());
                            break;
                        case 3:
                            ps.setString(4, cell.getStringCellValue());
                            break;
                        default:
                            break;
                    }
                }

                //执行SQL语句
                ps.executeUpdate();
            }

            //关闭PreparedStatement对象
            ps.close();

            //关闭数据库连接
            conn.close();

            //关闭Excel文件流
            fis.close();

            System.out.println("数据导入完成！");

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

代码中使用了Apache POI库来读取Excel文件，将读取到的数据插入到MySQL数据库中。你需要根据自己的实际情况修改代码中的数据库连接信息和SQL语句。