📄 shopcarorsaveservlet.java

📁 手工完成
💻 JAVA
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package Servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;

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 Bean.DBConn;

public class ShopCarOrSaveServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ShopCarOrSaveServlet() {
		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");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * 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 {
//---------------------Start MyCode-----------------------------------------------
		HttpSession session = request.getSession();
		
		String strShopCar = request.getParameter("SubmitShopCar");
		String strSave = request.getParameter("SubmitSave");
		
		String strbookID = request.getParameter("bookID");System.out.println("strbookID is" + strbookID);
		String strusername = request.getParameter("username");
		String count = request.getParameter("count");System.out.println("count is " + count);
		
		if(strShopCar != null)               //---------添加到购物车---------------
		{
//			request.setAttribute("bookID", strbookID);
			HashMap ShopCar = (HashMap)session.getAttribute("ShopCar");
			
			if(ShopCar == null)
			{	
				ShopCar = new HashMap();
			}
			String testCount = (String)ShopCar.get(strbookID);
			if(testCount == null)  //购物车中没有这种货物时
			{
				ShopCar.put(strbookID,count);//将购买的货物放入购物车
			}
			else   //购物车中有这种货物时，只需向testCount上加上Count即可
			{
				int newCount = Integer.parseInt(count) + Integer.parseInt(testCount);
				count = String.valueOf(newCount);
				ShopCar.put(strbookID,count);   //将改后的Count存入ShopCar中
			}
			System.out.println("5555");
			session.setAttribute("ShopCar",ShopCar);//将ShopCar存放如session中
			request.getRequestDispatcher("/BookShopCar.jsp").forward(request,response);
//			response.sendRedirect("/BookShopCar.jsp");
		}
		if(strSave != null)                 //----------添加到收藏架----------------
		{
			Bean.BookSave booksave = new Bean.BookSave();
			booksave.save(strusername, strbookID);
			
			Bean.SaveBookExcute savebook = new Bean.SaveBookExcute();
			ArrayList<Bean.BookBean> savebookarray = savebook.saveBookQuery(strusername);
			request.setAttribute("savebook", savebookarray);
			
			request.getRequestDispatcher("/ShowSaveBook.jsp").forward(request, response);
		}
		
//-----------------------------End MyCode-------------------------------------------------------------

	}

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

}
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