controller.java

图书馆检索系统

import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Controller extends HttpServlet {
  public void init(ServletConfig conf) throws ServletException {
    super.init(conf);
  }

  public void doGet (HttpServletRequest req, HttpServletResponse res)
          throws ServletException, IOException {
    doPost(req, res);
  }

  protected void sendErrorRedirect(HttpServletRequest request,
          HttpServletResponse response, Throwable t) {
    // Forwards an exception to the error page.
    try {
      request.getSession().setAttribute("jspException", t);
      response.sendRedirect("/library/error.jsp");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}