dispatcherservlet.java

java实现的可配置的工作流引擎,采用jsp+javabean实现

package com.hongsoft.res.dispatcher;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.hongsoft.res.util.CommandMap;

/**
 * <p>
 * Description: 分发器，系统唯一的Servlet入口，Dispatcher自动根据CommandName 分发到相关的Command
 * </p>
 */

public class DispatcherServlet extends HttpServlet {

    private static final long serialVersionUID = -1586474518907595440L;

    // Initialize global variables
    public void init() throws ServletException {
    }

    // Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        CommandRequest req = new CommandRequest(request);
        CommandResponse res = new CommandResponse(response);
        String cmdName = req.getCommandName();
        try {
            BaseCommand cmd = CommandMap.getCommand(cmdName);
            cmd.setRequest(req);
            cmd.setResponse(res);
            cmd.command();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    // Clean up resources
    public void destroy() {
    }
}