HTML------4.分页查询

 </tr>
             <tr align="center"  class="t1">
            <td >
              <%if(!session.getAttribute("setNum").toString().equals("0")){%>
            <a href="MachineAction.action?page=1">上一页</a>
            <%} %>
           <a href="MachineAction.action?page=2">下一页</a>
           </td>
             </tr>

//创建session对象
        HttpSession session=ServletActionContext.getRequest().getSession();
        if (session.getAttribute("id")==null) {
            out.print("<script lanaguage='javascript'>alert('请重新登录');window.location='login.jsp';></script>");
            out.flush();
            out.close();
            return null;
        }

        if (page.equals("0")) {
            if (setNum.equals("0")) {
                session.setAttribute("setNum", setNum);
            }
        }
        //上一页
        if (page.equals("1")) {
            setNum=String.valueOf(Integer.valueOf(session.getAttribute("setNum").toString())-1);
        }
        //下一页
        else if(page.equals("2"))
        {
            setNum=String.valueOf(Integer.valueOf(session.getAttribute("setNum").toString())+1);
        }

        session.setAttribute("setNum", setNum);