shoppingokservlet.java~15~

来自「网上购书系统！jsp+servlet+jdbc实现！数据库sqlserver2」· JAVA~15~ 代码 · 共 64 行

package myservlet;

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

public class ShoppingOkServlet 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");
        String isbuy = request.getParameter("Submit");
        //获得用户要删除的书
        String[] shu = request.getParameterValues("shu");
        response.setContentType(CONTENT_TYPE);
        PrintWriter out = response.getWriter();
        HttpSession session = request.getSession();
        Object obj = session.getAttribute("book"); //获得用户选择的书
        ArrayList list = (ArrayList) obj;
        if (isbuy.equals("删除")) {
            BookInfoBean bean = new BookInfoBean();
            //从选购中删除客户不要的书
            for (int i = 0; i < shu.length; i++) { //外循环控制客户选的书名
                for (int j = 0; j < list.size(); j++) { //内循环控制客户选的书名
                    bean = (BookInfoBean) list.get(j);
                    //删除客户不要的书
                    if (bean.getName().equals(shu[i])) {
                        list.remove(bean);
                        break;
                    }
                }
            }
            session.setAttribute("book", list);
            response.sendRedirect("shopcar.jsp");
        } else {
            session.setAttribute("book", list);
            Object userobj = session.getAttribute("name");
            String username = (String) userobj;
            session.setAttribute("name", username);

            response.sendRedirect("buy.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() {
    }
}