shopsud1bystateservlet.java

一个仿造淘宝的jsp网站。功能比较完善

package com.jc.taobao.gjj.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

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

import com.jc.taobao.gjj.entity.ShopInfo;
import com.jc.taobao.gjj.entity.StateInfo;
import com.jc.taobao.gjj.logic.ShopInfoBean;
import com.jc.taobao.gjj.logic.StateInfoBean;

public class ShopSUD1ByStateServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ShopSUD1ByStateServlet() {
		super();
	}

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

	/**
	 * 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 {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
         StateInfoBean sbean=new StateInfoBean();
		
		String statename=request.getParameter("selectstate").trim();
		ArrayList alstate=sbean.getquerybystatename(statename);
		if(alstate.isEmpty()||alstate==null)
		{
			out.print("<script>alert('对不起，没有该状态的商品!');window.history.go(-1);</script>");
		}else
		{
		StateInfo state=(StateInfo)alstate.get(0);
		int stateid=state.getStateid();
		
		ShopInfo shop=new ShopInfo();
		ShopInfoBean shopbean=new ShopInfoBean();
		shop.setStateid(stateid);
		ArrayList selectshopbyshopnameal=(ArrayList)shopbean.getquerybystateid(shop);
		if(selectshopbyshopnameal.isEmpty()||selectshopbyshopnameal==null)
		{
		out.print("<script>alert('对不起，没有该状态的商品!');window.history.go(-1);</script>");
		}else
		{
		request.getSession().setAttribute("selectshopbyshopnameal", selectshopbyshopnameal);
		response.sendRedirect("/taobao/Shopcontrol.jsp");
		}
		}
	}

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

}