将动态Excel行映射到SQL数据库列的方法如下:
以下是一个示例代码片段,展示了如何使用Java和Apache POI将动态Excel行映射到MySQL数据库列:
import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
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 ExcelToDatabaseMapper {
public static void main(String[] args) {
String excelFilePath = "path/to/excel.xlsx";
String databaseUrl = "jdbc:mysql://localhost:3306/mydatabase";
String databaseUser = "username";
String databasePassword = "password";
try (Connection connection = DriverManager.getConnection(databaseUrl, databaseUser, databasePassword)) {
FileInputStream excelFile = new FileInputStream(excelFilePath);
XSSFWorkbook workbook = new XSSFWorkbook(excelFile);
Sheet sheet = workbook.getSheetAt(0);
// Assuming the first row in the Excel sheet contains column names
Row headerRow = sheet.getRow(0);
// Create table if it does not exist
createTableIfNotExists(connection, headerRow);
// Prepare insert statement
String insertQuery = buildInsertQuery(headerRow);
PreparedStatement preparedStatement = connection.prepareStatement(insertQuery);
// Iterate through rows and map to database columns
for (int i = 1; i <= sheet.getLastRowNum(); i++) {
Row row = sheet.getRow(i);
// Iterate through cells and bind values to the prepared statement
for (int j = 0; j < row.getLastCellNum(); j++) {
Cell cell = row.getCell(j);
preparedStatement.setString(j + 1, cell.getStringCellValue());
}
preparedStatement.executeUpdate();
}
preparedStatement.close();
workbook.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static void createTableIfNotExists(Connection connection, Row headerRow) throws SQLException {
// Implement your logic to create table if not exists using headerRow information
}
private static String buildInsertQuery(Row headerRow) {
// Implement your logic to build insert query dynamically based on headerRow information
return "INSERT INTO tableName (column1, column2, ...) VALUES (?, ?, ...)";
}
}
请注意,此代码示例仅说明了一种实现方法,并且在实际使用中需要根据您的具体需求进行适当的修改。
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