public int insert(User user){                             
        int count = 0;
        Connection conn = null;
        PreparedStatement ps = null;
        //根据user对象的属性生成sql语句
        String sql = "insert into user(tel,username,addr,mail,type,num,yf) values('"+user.getTel()+"','"+user.getUsername()+"','"+user.getAddr()+"','"+user.getMail()+"','"+user.getType()+"','"+user.getNum()+"','"+user.getYf()+"')";
        try {
            conn = getConnection();
            ps = conn.prepareStatement(sql);
            count = ps.executeUpdate();
        } catch (SQLException e) {
            System.out.println("Sql异常2");
        }
        finally{
            if(ps!=null){
                try {
                    ps.close();
                } catch (SQLException e) {
                    System.out.println("关闭ps时异常");
                }
            }
            if(conn!=null){
                try {
                    conn.close();
                } catch (SQLException e) {
                    System.out.println("关闭conn时异常");
                }
            }
        }
        return count;
    }

  恭喜，你已经成功订阅！<br>
            您订阅的名字为： <% out.println(request.getParameter("username"));%><br>
            您订阅的手机号码为:<%out.println(request.getParameter("tel")); %><br>
            您订阅的地址为：<% out.println(request.getParameter("addr"));%><br>    
           您订阅的邮箱为：<% out.println(request.getParameter("mail"));%><br>
           您订阅的种类为：<% out.println(request.getParameter("type"));%><br><br>