shopservlet.java

网上购书系统！jsp+servlet+jdbc实现！数据库sqlserver2

package myservlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import serives.userserver;
import beans.BookInfoBean;

public class ShopServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        request.setCharacterEncoding("GBK");
        //获得要购买的书籍
        String[] books = request.getParameterValues("book");
        //获得书店的书
        ArrayList list = userserver.SelectBookInfo();
        BookInfoBean bean = new BookInfoBean();
        //创建一个用户选择书的容器
        ArrayList userlist = new ArrayList();
        //从书店中删除客户不要的书
        for (int i = 0; i < books.length; i++) { //外循环控制客户选的书名
            for (int j = 0; j < list.size(); j++) { //内循环控制书店的书名
                bean = (BookInfoBean) list.get(j);
                //删除客户不要的书
                if (bean.getName().equals(books[i])) {
                    userlist.add(bean);
                    break;
                }
            }
        }
        response.setContentType(CONTENT_TYPE);
        HttpSession session = request.getSession();
        session.setMaxInactiveInterval(15 * 60);
        session.setAttribute("book", userlist);


        //跳转到购物车
        response.sendRedirect("shopcar.jsp");
    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy() {
    }
}