登陆后立刻设置会话属性

已经注册用户，在其登陆页面就设置session

<%String yhm = request.getParameter("yhm");String yhmm = request.getParameter("yhmm");if (yhm.equals(yhm) & yhmm.equals(yhmm)) {session.setAttribute("login", "1");response.sendRedirect("ly.jsp");} else {out.println("密码错误");}%>

然后在其它页面使用会话属性：

<%String login = (String) session.getAttribute("login");if (login == null) {out.println("您不是管理员！不能登陆删除");} else {Connection con = wu.getConn();Statement stmt = con.createStatement();String id = request.getParameter("id");String sql = "delete from liuyan_temp where id=" + id;stmt.executeUpdate(sql);try {stmt.close();con.close();} catch (Exception ex) {}response.sendRedirect("ly.jsp");}%>