Chamar só doPost

public class Config_Servlet extends HttpServlet{
	private static final long serialVersionUID = 1L;	
	protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException {
		System.out.println("doGet");
		performTask(arg0, arg1);
	}
	protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException {
		System.out.println("doPost");
		performTask(arg0, arg1);
	}
	protected void performTask(HttpServletRequest req, HttpServletResponse res){
		try{
			String filename = req.getParameter("filename");
			if(filename != null){
				// TODO: Carregar o arquivo especificado em filename
			}
			// TODO: Carregar o histórico do BD
			try{ // Load the DB2 JDBC Type 2 Driver with DriverManager
				Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");
				String url = "jdbc:db2:TCC2";
				String user = "tcc";
				String password = "tcc";
				Connection con = DriverManager.getConnection(url,user,password);
			}catch(ClassNotFoundException e){
				System.out.println("Not found");
				e.printStackTrace();
			}catch(Exception e){
				System.out.println("Outra Exception");
				e.printStackTrace();
			}
			req.setAttribute("historico", new HistoricoBean());
			getServletContext().getRequestDispatcher("/config.jsp").forward(req, res);
		}catch(Exception e){
			e.printStackTrace();
		}
	}

private void doGet(/* Argumentos*/){
   doPost(/*Argumentos*/);
}

private void doPost(/*Argumentos*/){
   System.out.println(" :-) ");
}