mysql-请问：我这个代码怎修改，实现excel导入到MySQL中？谢谢

/**

• 导入表时的选择器

• @author yangenxiong
  *
  */
  class importTableChooser extends JFileChooser {

  private MainFrame mainFrame;

  private Database db;

  public importTableChooser(MainFrame mainFrame, Database db) {
  this.mainFrame = mainFrame;
  this.db = db;
  this.setFileSelectionMode(DIRECTORIES_ONLY);
  }

  public void approveSelection() {
  File file = this.getSelectedFile();
  if (file.isDirectory()) {
  //用户选择了目录
  File targetFile = new File(file.getAbsolutePath() + File.separator +
  this.db.getDatabaseName() + ".xls");
  this.mainFrame.importTable();
  } else {
  this.mainFrame.importTable();
  }
  super.approveSelection();
  }
  }