com.strangelight.servlet
Class HtmlServlet

java.lang.Object
  |
  +--javax.servlet.GenericServlet
        |
        +--javax.servlet.http.HttpServlet
              |
              +--com.strangelight.servlet.HtmlServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

adminServlet, HexTestServlet, IndexServlet, TaskMasterServlet, TextEditServlet, UserServlet

public abstract class HtmlServlet

extends javax.servlet.http.HttpServlet

An extension of HttpServlet which simplifies the writing of HTML-serving servlets in several ways. Specifically:

• Automatically sets the content-type to text/html .
• Defines a single method for handling both GET and POST requests in a uniform way.
• Automatically extracts some of the most-commonly needed information from the server-generated HttpServletRequest and HttpServletResponse objects.
• Automatically catches and displays any errors thrown during servlet execution.

See Also:

Serialized Form

Constructor Summary

HtmlServlet()

Method Summary

void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handles the HTTP GET request by calling doGetOrPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.http.HttpSession, java.util.Map, java.io.PrintWriter).
abstract void	doGetOrPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.http.HttpSession session, java.util.Map query, java.io.PrintWriter out) Servlets define this method to handle browser requests.
void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handles the HTTP POST request by calling doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse), thus ensuring that GET requests are handled identically to POST requests.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, init, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HtmlServlet

public HtmlServlet()

Method Detail

doGetOrPost

public abstract void doGetOrPost(javax.servlet.http.HttpServletRequest request,
                                 javax.servlet.http.HttpServletResponse response,
                                 javax.servlet.http.HttpSession session,
                                 java.util.Map query,
                                 java.io.PrintWriter out)
                          throws java.lang.Exception

Servlets define this method to handle browser requests.

Parameters:

request - a HttpServletRequest object encapsulating this browser request.

response - a HttpServletResponse object encapsulating the servlet's response.

session - the HttpSession for this request. A null value indicates that this request is not part of any established session.

out - the PrintWriter to which the servlet should write its HTML.

java.lang.Exception

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws javax.servlet.ServletException,
                  java.io.IOException

Handles the HTTP GET request by calling doGetOrPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, javax.servlet.http.HttpSession, java.util.Map, java.io.PrintWriter). Also displays any exceptions that may be thrown by doGetOrPost.

(This method is called by the server, and should not be called by servlet code. Most servlets can leave this method as-is, but some may need to override it.)

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - a HttpServletRequest object encapsulating this browser request.

response - a HttpServletResponse object encapsulating the servlet's response.

javax.servlet.ServletException

java.io.IOException

doPost

public void doPost(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws javax.servlet.ServletException,
                   java.io.IOException

Handles the HTTP POST request by calling doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse), thus ensuring that GET requests are handled identically to POST requests.

(This method is called by the server, and should not be called by servlet code. Most servlets can leave this method as-is, but some may need to override it.)

Overrides:

doPost in class javax.servlet.http.HttpServlet

Parameters:

request - a HttpServletRequest object encapsulating this browser request.

response - a HttpServletResponse object encapsulating the servlet's response.

javax.servlet.ServletException

java.io.IOException