📄 buybookservlet.java

📁 网上书店源代码和数据库网上书店源代码和数据库
💻 JAVA
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package com.shop.controller;

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

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

import com.shop.model.dao.addbook.BuybookDAO;
import com.shop.vo.addbook.BookInfoVo;


public class BuyBookServlet extends HttpServlet {

	/**
	 * 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 {

		String userid = String.valueOf(request.getSession().getAttribute(
				"userid"));

		List<BookInfoVo> bookList = (List<BookInfoVo>) request.getSession().getAttribute("bookList");
		if(bookList!=null){
		for (BookInfoVo book : bookList) {
			BuybookDAO buybookDAO=new BuybookDAO();
			buybookDAO.insertsellbook(userid, book);
		}
		}else{
			request.setAttribute("info", "这些书你已经购买过了!!");
		}
		request.getSession().removeAttribute("cat");
		request.getSession().removeAttribute("bookList");
		request.getRequestDispatcher("/bookcat/catList.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 {

		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 POST method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

}
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