dispatchservlet.java

oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码oa源码

package com.statistical.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import com.statistical.factory.ProcessBeanFactory;
import com.statistical.process.IStatisticalProcessIntf;



public class DispatchServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public DispatchServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.process(request, response);	
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.process(request, response);
	}
	/**
	 * parameter: operateType(1,2,3),queryType=(YEAR,MONTH,DAY),
	 * */
	private void process(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException{
		String url = "";
		String operateType = request.getParameter("operateType");
		String initPage = request.getParameter("initPage");
		if(initPage.equals("0")){
			ProcessBeanFactory factory = ProcessBeanFactory.getProcessBeanFactory();
			IStatisticalProcessIntf processBean = factory.getProcessBeanByName(operateType);
			try {
				processBean.process(request, response);
			} catch (Exception e) {				
				e.printStackTrace();
				throw new ServletException();
			}
		}
		if(operateType.equals(ProcessBeanFactory.TRAFFIC_HOTSPOT_QUERY)){
			url = "/jsp/TrafficHotspotQuery.jsp";
		}else if(operateType.equals(ProcessBeanFactory.CALLTHEPOLICE_HAPPEN_FORECAST)){
			url = "/jsp/CallThePoliceHappenForecast.jsp";
		}else if(operateType.equals(ProcessBeanFactory.TRAFFIC_HOTSPOT_FORECAST)){
			url = "/jsp/TrafficHotspotForecast.jsp";
		}
		RequestDispatcher dispatcher = request.getRequestDispatcher(url);
		dispatcher.forward(request, response);
	}
	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}