Welcome to Bytesize Books

/ch7/cookie/ControllerHelper.java /ch7/cookie/ControllerHelper.java

package ch7.cookie;

import java.io.IOException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import shared.HelperBaseCh6;

//Import the bean for the application
import javax.servlet.http.HttpServlet;
import shared.ButtonMethod;

public class ControllerHelper extends HelperBaseCh6 {
  
  public ControllerHelper(
            HttpServlet servlet,
            HttpServletRequest request,
            HttpServletResponse response) {
        super(servlet, request, response);
  }
  
  public void copyFromSession(Object sessionHelper) {
  }
  
  protected String jspLocation(String page) {
    return "/WEB-INF/classes/ch7/cookie/" + page;
  }
  
  @ButtonMethod(
      buttonName="showCookieButton", isDefault=true)
  public String showMethod() {
    return jspLocation("ShowCookies.jsp");
  }
  
  @ButtonMethod(buttonName="setCookieButton")
  public String setMethod() {   
     Cookie dolphins
        = new Cookie("dolphins",
                     "The Dolphins are here to stay");
    dolphins.setPath("/");
    response.addCookie(dolphins);
    
    Cookie marlins
        = new Cookie("marlins",
                     "The Marlins will be gone soon");
    marlins.setMaxAge(15);
    marlins.setPath("/");
    response.addCookie(marlins);  
    
    return jspLocation("ShowCookies.jsp");
  }
  
  @ButtonMethod(buttonName="deleteCookieButton")
  public String deleteMethod() {
    Cookie marlins = new Cookie("marlins", "bye-bye");
    marlins.setMaxAge(0);
    marlins.setPath("/");
    response.addCookie(marlins);
    return jspLocation("ShowCookies.jsp");
  }
  
  @ButtonMethod(buttonName="findCookieButton")
  public String findMethod() {
    Cookie[] cookieArray = request.getCookies();
    Cookie marlins = null;
    if (cookieArray != null) {
        for (Cookie cookie : cookieArray) {
            if (cookie.getName().equals("marlins")) {
                marlins = cookie;
            }
        }
    }
    String result = "The Marlins have left town";
    if (marlins != null) {
        result = marlins.getValue();
    }
    request.setAttribute("marlins",result);
    
    return jspLocation("ShowCookies.jsp");
  }
  
  @ButtonMethod(buttonName="setSpecificCookieButton")
  public String setSpecificMethod() {
    Cookie specific
        = new Cookie("specific", 
                     "Not all pages can see this cookie");
    specific.setMaxAge(15);
    response.addCookie(specific);
    return jspLocation("ShowCookies.jsp");
  }
  
  @Override
  protected void doGet() 
    throws ServletException, IOException
  {    
    String address = executeButtonMethod();

request.getRequestDispatcher(address)
        .forward(request, response);
  }
  
}

Contact the author