📄 bookbuyservlet.java

📁 手工完成
💻 JAVA
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package Servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.*;

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

public class BookBuyServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public BookBuyServlet() {
		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 {
		
		HttpSession session = request.getSession();
		//double money = Double.valueOf((String)request.getAttribute("money"));System.out.println(money + "zheshi money");
		double money = Double.valueOf((String)request.getParameter("money"));
		String username = (String)session.getAttribute("username");
		username = (String)request.getParameter("username");
		HashMap ShopCar = (HashMap)session.getAttribute("ShopCar");
   		if(ShopCar == null)
   		{
   			System.out.println("你没有购买任何图书");
   		}
   		else
   		{
   		int i = 0;
   		//	Set ShowShopCar = ShopCar.entrySet();
   			Set ShowShopCar = ShopCar.keySet();
   			Iterator iterator = ShowShopCar.iterator();
   			while(iterator.hasNext())
   			{
   				i++;
//   				out.print("第  " + i + " 条记录  ");
   				String key = (String)iterator.next();
   				String value = (String)ShopCar.get(key);
   				
   				Bean.BuyBookBean buybookbean = new Bean.BuyBookBean();
   				buybookbean.setBookID(key);
   				buybookbean.setUsername(username);
   				buybookbean.setCount(Integer.parseInt(value));
   				buybookbean.setMoney(money);
   				
   				Bean.BuyBook buybook = new Bean.BuyBook();
   				buybook.insert(buybookbean);
   			}
   		}
   		
   		request.getRequestDispatcher("/UserBuyBook.jsp").forward(request, response);
	}

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

}
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