Excel导入数据库的Java代码

在导入Excel数据到数据库时，首先需要选择一个合适的 Java 框架或工具，以实现读取和解析 Excel 文件。一些常用的选择包括 Apache POI、JExcelAPI 和 OpenXLS。

以 Apache POI 为例，下面是一个简单的 Java 代码，用于从 Excel 文件读取数据并将其导入到数据库：

import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.Iterator;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ExcelToDatabase {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/dbname", "username", "password");
            PreparedStatement statement = connection.prepareStatement("INSERT INTO tablename (column1, column2, column3) VALUES (?, ?, ?)");

            FileInputStream file = new FileInputStream("file.xlsx");
            XSSFWorkbook workbook = new XSSFWorkbook(file);
            XSSFSheet sheet = workbook.getSheetAt(0);
            Iterator<Row> rowIterator = sheet.iterator();

            while (rowIterator.hasNext()) {
                Row row = rowIterator.next();
                Iterator<Cell> cellIterator = row.cellIterator();

                while (cellIterator.hasNext()) {
                    Cell cell = cellIterator.next();
                    switch (cell.getCellType()) {
                        case NUMERIC:
                            statement.setDouble(cell.getColumnIndex() + 1, cell.getNumericCellValue());
                            break;
                        case STRING:
                            statement.setString(cell.getColumnIndex() + 1, cell.getStringCellValue());
                            break;
                    }
                }
                statement.executeUpdate();
            }

            file.close();
            connection.close();

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

该代码使用了 Apache POI 库，用于读取 Excel 文件并将数据导入到 MySQL 数