範例
public void doPost(HttpServletRequest req, HttpServletResponse resp)
{
boolean sortAscending = getSortType(req);
sort(sortAscending);
}

private void sort(boolean sortAscending) {
DefaultTableModel tblModel = new DefaultTableModel();
Vector data = tblModel.getDataVector();
// ...
}

private boolean getSortType(HttpServletRequest req) {
return (req.getParameter(PARM_NAME) != null);
}

private static final String PARM_NAME = "ascending";
解決方案
使用適用於 J2EE 應用程式的具備執行緒安全性的元件。