ch6.complexInit
Class Controller

java.lang.Object
  extended by javax.servlet.GenericServlet
      extended by javax.servlet.http.HttpServlet
          extended by ch6.complexInit.Controller
All Implemented Interfaces:
java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class Controller
extends javax.servlet.http.HttpServlet

Uses complex form elements. Creates a map of values that have been selected by the user. This map can be accessed in the JSP to simplify initialising the complex elements.

See Also:
Serialized Form

Constructor Summary
Controller()
           
 
Method Summary
protected  void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          When the browser makes a GET request, this is the method in the controller that is called.
protected  void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
          When the browser makes a POST request, this is the method in the controller that is called.
 
Methods inherited from class javax.servlet.http.HttpServlet
doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service
 
Methods inherited from class javax.servlet.GenericServlet
destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Controller

public Controller()
Method Detail

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws java.io.IOException,
                     javax.servlet.ServletException
When the browser makes a GET request, this is the method in the controller that is called.

The work of the controller will be handled by the helper. The controller will create the helper class and call its doGet method to process the request.

Overrides:
doGet in class javax.servlet.http.HttpServlet
Parameters:
request - Encapsulates all of the request information that is needed to communicate with the browser.
response - Encapsulates all of the response information that is needed to communicate with the browser.
Throws:
javax.servlet.ServletException - A servlet exception is a severe error that will prevent further processing.
java.io.IOException - An IO exception is a severe error that will prevent further processing.

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws java.io.IOException,
                      javax.servlet.ServletException
When the browser makes a POST request, this is the method in the controller that is called.

The work of the controller will be handled by the helper. The controller will create the helper class and call its doPost method to process the request.

Overrides:
doPost in class javax.servlet.http.HttpServlet
Parameters:
request - Encapsulates all of the request information that is needed to communicate with the browser.
response - Encapsulates all of the response information that is needed to communicate with the browser.
Throws:
javax.servlet.ServletException - A servlet exception is a severe error that will prevent further processing.
java.io.IOException - An IO exception is a severe error that will prevent further processing.