这是我自己开发的一个MVC框架

				package dark.web.frame.controller;
				
				import java.io.IOException;
				import java.io.InputStream;
				import java.util.Properties;
				
				import javax.servlet.ServletConfig;
				import javax.servlet.ServletContext;
				import javax.servlet.ServletException;
				import javax.servlet.http.HttpServlet;
				import javax.servlet.http.HttpServletRequest;
				import javax.servlet.http.HttpServletResponse;
				
				import dark.web.frame.Controller;
				import dark.web.frame.Helper;
				import dark.web.frame.Message;
				
				import org.apache.commons.configuration.PropertiesConfiguration;
				import org.apache.log4j.Logger;
				import org.apache.log4j.PropertyConfigurator;
				
				/**
				 * Title:            Servlet前端操作器
				 * Description:      用于捕获用户请求，并根据请求命令字调用相应的命令处理程序处理请求
				 * Copyright:        Copyright (c) 2004
				 * Company:          DIS
				 * Create Time:      2004-3-6 0:12:56
				 * @author             darkhe
				 * @version            1.0
				 */
				public abstract class AbstractController
					extends HttpServlet
					implements Controller
				{
					public static final String LOG4J_KEY = "log4j";
				
					public static final String DWF_KEY = "dwf";
				
					public static final String MESSAGE_KEY = "message";
				
					protected static Logger log = Logger.getLogger("DWF");
				
					protected static PropertiesConfiguration configuration =
						new PropertiesConfiguration();
				
					private static Message message = new Message();
				
					/**
					 * @param request
					 * @param response
					 * @throws javax.servlet.ServletException
					 * @throws java.io.IOException
					 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
					 */
					protected void doGet(
						HttpServletRequest request,
						HttpServletResponse response)
						throws ServletException, IOException
					{
						doRequest(request, response);
					}
				
					/**	 
					 * @param request
					 * @param response
					 * @throws ServletException
					 * @throws IOException
					 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
					 */
					protected void doPost(
						HttpServletRequest request,
						HttpServletResponse response)
						throws ServletException, IOException
					{
						doRequest(request, response);
					}
				
					/**
					 * @return
					 */
					public static PropertiesConfiguration getConfiguration()
					{
						return configuration;
					}
				
					/**
					 * @param configuration
					 */
					public static void setConfiguration(PropertiesConfiguration configuration)
					{
						AbstractController.configuration = configuration;
					}
				
					/**
					 * 加载dwf初始化参数
					 * @param config servlet configuation
					 */
					protected void initDWF(ServletConfig config) throws ServletException
					{
						ServletContext servletContext = config.getServletContext();
				
						String file = config.getInitParameter(DWF_KEY);
				
						if (file == null || file.length() == 0)
						{
							file = servletContext.getInitParameter(DWF_KEY);
						}
				
						if (file != null)
						{
							String filepath = Helper.getRealPath(servletContext, file);
							InputStream is = Helper.getInputStream(servletContext, filepath);
							try
							{
								configuration.load(is);
							}
							catch (IOException e)
							{
								log.error("加载DWF配置信息出错", e);
				
								// 因为这个配置信息相当关键，
								// 所以不允许在初始化过程出错，
								// 所以一旦出错则停止初始化过程
								throw new ServletException();
							}
						}
						else
						{
							log.error("加载DWF配置信息出错");
				
							// 因为这个配置信息相当关键，
							// 所以不允许在初始化过程出错，
							// 所以一旦出错则停止初始化过程			
							throw new ServletException("dwf 配置参数读取失败");
						}
					}
				
					/**
					 * 初始化initLog4j引擎
					 */
					protected void initLog4j(ServletConfig config)
					{
						ServletContext servletContext = config.getServletContext();
				
						String file = config.getInitParameter(LOG4J_KEY);
				
						if (file == null || file.length() == 0)
						{
							file = servletContext.getInitParameter(LOG4J_KEY);
						}
				
						if (file != null)
						{
							String filepath = Helper.getRealPath(servletContext, file);
							InputStream is = Helper.getInputStream(servletContext, filepath);
							try
							{
								Properties p = new Properties();
								p.load(is);
				
								String path = p.getProperty("log4j.appender.A2.file");
				
								if (path != null)
								{
									path = getServletContext().getRealPath(path);
									log.info("log4j.appender.A2.file=" + path);
				
									p.setProperty("log4j.appender.A2.file", path);
								}
				
								PropertyConfigurator.configure(p);
							}
							catch (IOException e)
							{
								log.error("加载LOG4J配置信息出错", e);
							}
						}
						else
						{
							log.error("log4j 配置参数读取失败");
						}
					}
				
					/**
					 * 初始化Message
					 */
					protected void genMessage(ServletConfig config)
					{
						ServletContext servletContext = config.getServletContext();
				
						String file = config.getInitParameter(MESSAGE_KEY);
				
						if (file == null || file.length() == 0)
						{
							file = servletContext.getInitParameter(MESSAGE_KEY);
						}
				
						if (file != null)
						{
							String filepath = Helper.getRealPath(servletContext, file);
							InputStream is = Helper.getInputStream(servletContext, filepath);
							try
							{
								message = new Message(is);
							}
							catch (IOException e)
							{				
								log.error("加载message文件出错，生成一个不能读取消息文件的Message实例", e);
							}
						}
						else
						{
							log.error("message 配置参数读取失败");
						}
					}
					/**
					 * @param servletConfig
					 * @throws javax.servlet.ServletException
					 * @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
					 */
					public void init(ServletConfig servletConfig) throws ServletException
					{
						super.init(servletConfig);
				
						initDWF(servletConfig);
				
						initLog4j(servletConfig);
				
						genMessage(servletConfig);
					}
					/**
					 * @return
					 */
					public static Message getMessage()
					{
						return message;
					}
				
					/**
					 * @param message
					 */
					public static void setMessage(Message message)
					{
						AbstractController.message = message;
					}
				
				}