foodservlet.java

贯穿案例JSP+JavaBean+Servlet网上订餐系统.希望大家下载下来研究

package com.restrant.servlet;

import java.io.IOException;
import java.util.List;

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

import com.restrant.dao.FoodDao;
import com.restrant.dao.FoodDaoChaxun;
import com.restrant.dao.ForumFactory;
import com.restrant.dao.ForumFactoryChaxun;
import com.restrant.entity.FoodBean;



public class FoodServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public FoodServlet() {
		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 {

		response.setContentType("text/html");
		HttpSession session = request.getSession();
		ForumFactory factory = new ForumFactoryChaxun();
		FoodDao foodDao = factory.getFood("FoodDaoChaxun");
		if (foodDao!=null) {
			List<FoodBean> list = foodDao.getFoods();
			if (list.size()>0) {
				session.setAttribute("FoodList", list);
				response.sendRedirect("/restrant/ch01/show.jsp");
//				request.getRequestDispatcher("/ch01/show.jsp").forward(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 {

		doGet(request,response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}