session案例:使用Session完成简单的购物功能
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2022-03-14 22:49:45
...
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%--sale.jsp--%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<a href="<%=request.getContextPath() %>/servlet/BuyServlet?prod=洗衣机">洗衣机</a>
<a href="<%=request.getContextPath() %>/servlet/BuyServlet?prod=电视机">电视机</a>
<a href="<%=request.getContextPath() %>/servlet/PayServlet">结账</a>
</body>
</html>
package it.com.session;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
//加入购物车
public class BuyServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String prod=request.getParameter("prod");
prod=new String(prod.getBytes("iso8859-1"),"utf-8");//解决乱码问题
HttpSession session=request.getSession();
session.setAttribute("prod", prod);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
package it.com.session;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
//结账
public class PayServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8"); //解决乱码问题
HttpSession session=request.getSession();
String prod=(String)session.getAttribute("prod");
response.getWriter().write("您购买的是："+prod+"应付10000元");
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
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