购物车一 - #define wzz

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<html>
  <body>
    <%
        ArrayList books = new ArrayList();
        books.add("三国演义");
        books.add("西游记");
        books.add("水浒传");
        //将books放进session 名字为book
        session.setAttribute("book",books);
     %>
     <a href=MyJsp2.jsp>查看购物车</a>
  </body>
</html>


<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<html>
 <body>
       购物车内容为：
       <hr>
       <%  
           //从session中取出名为book的 放入数组中
           ArrayList books = (ArrayList)session.getAttribute("book");
           for(int i = 0;i<books.size();i++)
           {
               String book = (String)books.get(i);
               out.println(book + "<BR>");
           }
        %>
  </body>

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<html>
 <body>
    <form action = "MyJsp3.jsp" method = "post">
        请你输入书本：<input name ="book", type = "text">
        <input type = "submit" value = " 添加到购物车">
    </form>
    <hr>
    <%
        //取出名为books的
        ArrayList book = (ArrayList)session.getAttribute("books");
        if(book==null)  //如果没有 也就是第一次
        {
            out.print("wzz");
            book = new ArrayList();
            session.setAttribute("books",book);
        }
        String book1 = request.getParameter("book");
        if(book1!=null)
        {
            book1 = new String(book1.getBytes("ISO-8859-1"));
            book.add(book1);
        }
    %>
 购物车里的内容：<br>
 <%
     for(int i =0;i<book.size();i++)
     {
         //从数组里取出
         out.println(book.get(i)+"<BR>");
     }
  %>
     
  </body>
</html>

posted on 2014-08-08 15:56 #define wzz 阅读(216) 评论(0) 收藏举报

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