actionservlet.java

这是我们做的一个网上购物系统,包手用户和管理员两大功能模块,采用jsp+servlet+java bean技术.

package com.qyg.servlets;

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

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.qyg.tools.Card;
import com.qyg.shop.product.*;

import java.util.*;

public class ActionServlet extends HttpServlet {

	
	Card card;
	/**
	 * Constructor of the object.
	 */
	public ActionServlet() {
		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 {
		doPost(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 {
		HttpSession session = request.getSession();
		
		ProductDAO dao=new ProductManageDAO();
		String action=request.getParameter("action");		
		
		String orderby = request.getParameter("orderby");

		//商品查询中 购买导航 处理
		if(action!=null){
			if(action.equals("lead")){                                       
				response.sendRedirect("../product.jsp?action=lead");
			}
			
			//ID查询
			else if(action.equals("idSearch")){
				String ID = request.getParameter("ID");
				try{
					 response.sendRedirect("../product.jsp?action=id&ID="+ID);
				}catch(NumberFormatException e){
					System.out.println("NumberFormatError");
					response.sendRedirect("../page/goodssearch.jsp?errInfo=idnum_error");
					return;
				}
			}
			
			
			
			//商品查询中  接受用户输入框的处理
			else if(orderby!=null){
				String orderby2 = "product_id";
				if(orderby.equals("商品ID号")){
			        orderby2 = "product_id";
			    }else if(orderby.equals("商品名称")){
			        orderby2 = "product_name";
			    }else if(orderby.equals("商品价格")){
			        orderby2 = "product_price";
			    }else if(orderby.equals("商品种类")){
			        orderby2 = "product_cId";
			    }
	
				//关键字查询
				if(action.equals("keywordSearch")){
					String keyword = request.getParameter("keyword");
					session.setAttribute("keyword", keyword);
					response.sendRedirect("../product.jsp?action=key");
				}
				
				//价格范围查询	
				else if(action.equals("priceSearch")){
					String lowprice = request.getParameter("lowprice");
					String topprice = request.getParameter("topprice");
					try{
						session.setAttribute("lowprice", lowprice);
						session.setAttribute("topprice", topprice);
						
						response.sendRedirect("../product.jsp?action=price");
					}catch(NumberFormatException e){
						System.out.println("NumberFormatError");
						response.sendRedirect("../page/goodssearch.jsp?errInfo=pricenum_error");
						return;
					}
	
					
				}
				session.setAttribute("orderby", orderby2);
			}
			
			 //用户点击 购买 的事件处理
			else if(action.equals("buy")){
				int product_id=Integer.parseInt(request.getParameter("productid"));
			    Product p1=dao.getProductById(product_id);	
			    session = request.getSession();    
			    card=(Card)session.getAttribute("mycard");
			    if(card!=null){
				    card.addProduct(p1);    
				    session.setAttribute("mycard",card);
			    }		   
			    response.sendRedirect("../mycard.jsp");
			}
			
			//购物车中点击 删除 的处理
			else if(action.equals("del")){
				int product_id=Integer.parseInt(request.getParameter("productid"));
			    Product p1=dao.getProductById(product_id);	
			    session = request.getSession(); 
			    System.out.println("no start get session");
			    card=(Card)session.getAttribute("mycard");
			    if(card==null){
			    	card=new Card();
			    }
			    
			    card.delProduct(p1);  
			    System.out.println("del product");
			    session.setAttribute("mycard",card);
			    System.out.println("into session");
			    response.sendRedirect("../mycard.jsp");
			}
			
			//购物车中点击 增加 的处理
			else if(action.equals("add")){
				int product_id=Integer.parseInt(request.getParameter("productid"));
			    Product p1=dao.getProductById(product_id);	
			    session = request.getSession();    
			    card=(Card)session.getAttribute("mycard");
			    
			    card.addProduct(p1);    
			    session.setAttribute("mycard",card);
			   
			    response.sendRedirect("../mycard.jsp");
			}
			
			//购物车中点击 结账 的处理
			else if(action.equals("over")){
				double sum=0;
				session = request.getSession();     
			    card=(Card)session.getAttribute("mycard");
			    ArrayList list=card.getPlist();
			    for(int i=0;i<list.size();i++){
			    	Product p = (Product)list.get(i);
			    	sum += p.getProduct_price()*p.getProduct_cId();
			    }
			    session.setAttribute("result", sum);
			    session.setAttribute("mycard",card);
			    response.sendRedirect("../mycard.jsp");
			}
			
			//最新产品
			else if(action.equals("newest")){
				response.sendRedirect("../product.jsp?action=newest");
			}
			
			//消费金额记录查询页面处理
			else if(action.equals("select")){
				String radio = request.getParameter("radio");
				//消费记录查询中 没有选择所查询的消费记录时
				if(radio==null){
				response.sendRedirect("../page/select.jsp?radio=null");
				}
				
				//消费记录查询中 点击最新消费查询
				else if(radio.equals("one")){
					response.sendRedirect("../page/select.jsp?radio=one");
				}
				
				//消费记录查询中 历史记录查询
				else if(radio.equals("all")){
					response.sendRedirect("../page/select.jsp?radio=all");
				}
			}
						
		}
	
	}
	

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

}