分页封装实用工具类及其使用方法

分页封装实用工具类及其使用方法

作者： javaboy2012
Email：[e-mail]
qq:    1046011462

 

 

package com.yanek.util;import java.util.List;public class PageBean {/** * @param args */public static void main(String[] args) {}private int currentpage; // 当前页数private int pagesize; // 每页大小private int totalPagecount; // 总页数private int totalRecordCount; // 总记录数private List recordContents; // 当前页记录内容列表public int getCurrentpage() {return currentpage;}public int getPagesize() {return pagesize;}public List getRecordContents() {return recordContents;}public int getTotalPagecount() {return totalPagecount;}public int getTotalRecordCount() {return totalRecordCount;}public PageBean(int currentpage, int pagesize, int totalRecordCount, List recordContents) {super();this.currentpage = currentpage;this.pagesize = pagesize;this.totalRecordCount = totalRecordCount;this.recordContents = recordContents;if (totalRecordCount % pagesize == 0) {this.totalPagecount = totalRecordCount / pagesize;} else {this.totalPagecount = totalRecordCount / pagesize + 1;}}}调用方法： action里调用：public ActionForward list(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) {                TopicDAO tdao=new TopicDAOImpl();String s_pagesize=(String)request.getParameter("pagesize");int pagesize=20;if (s_pagesize!=null){pagesize=Integer.parseInt(s_pagesize);}int pagecount=1;String s_pagecount=(String)request.getParameter("pagecount");if (s_pagecount!=null){pagecount=Integer.parseInt(s_pagecount);}                                //得到记录总数long totalcount=tdao.getTopicTotalCount();System.out.println("total:"+totalcount);List topics=tdao.getTopics(pagesize,pagecount);for (int i=0;i<topics.size();i++){TopicBean tb=(TopicBean)topics.get(i);System.out.println(tb.getTid()+"-"+tb.getTname());}PageBean  pb=new PageBean(pagecount,pagesize, (int)totalcount,topics);request.setAttribute("topic_pagebean", pb);return mapping.findForward("topic_list");}jsp页面调用示例：  <%      PageBean  pb=(PageBean)request.getAttribute("topic_pagebean");    List topics=pb.getRecordContents();   %>  <div class="cont"><center><h2>记录列表</h2></center><br/><br/><div class="list"><form name="topic"  action="topic.do" method="get">      <input type="hidden" name="method" value="list" />      <input type="hidden" name="pagesize" value="<%=pb.getPagesize()%>" />  <table width="100%" border="0">        <tr class="white">          <th class="sl1" width="30%">标题</th>          <th width="30%" class="sl1">描述</th>          <th class="sl1" width="25%">ID </th>          <th width="15%"> 操作</th>        </tr>                    <%             for (int i=0;i<topics.size();i++){TopicBean tb=(TopicBean)topics.get(i);%><% String classname=""; if (i%2==1)  {  classname="white"; }%><tr class="<%=classname %>">          <td><%=tb.getTname() %></td>          <td><%=tb.getTdesc() %></td>          <td><%=tb.getTid() %>  </td>          <td><a href='/topic.do?method=view&tid=<%=tb.getTid() %>'>[查看]</a></td>        </tr><%}%>                                   <tr><td colspan="6"><p align="center"><br/>共<%=pb.getTotalRecordCount() %>个记录,共<%=pb.getTotalPagecount() %>页,每页<%=pb.getPagesize() %>个 ,当前第<%=pb.getCurrentpage() %>页 <%   if (pb.getCurrentpage()==1)   {          out.print("首页  上页 ");   }   else   {     %>      <a href="topic.do?method=list&pagecount=1&pagesize=<%=pb.getPagesize() %>">首页</a>      <a href="topic.do?method=list&pagecount=<%=pb.getCurrentpage()-1%>&pagesize=<%=pb.getPagesize() %>">上页</a>     <%        }   %>       <%   if (pb.getCurrentpage()==pb.getTotalPagecount())   {          out.print("下一页  尾页 ");   }   else   {     %>    <a href="topic.do?method=list&pagecount=<%=pb.getCurrentpage()+1 %>&pagesize=<%=pb.getPagesize() %>">下一页 </a>  <a href="topic.do?method=list&pagecount=<%=pb.getTotalPagecount() %>&pagesize=<%=pb.getPagesize() %>">  尾页</a>     <%        }   %> 转到第 <input type="text" name="pagecount" value="<%=pb.getCurrentpage() %>" size="4"> 页 <input type="submit" value="GO" size="4"></td></tr>         </table></form>     </div></div>action配置<action path="/topic" type="com.myweb.web.action.TopicAction" scope="request"  parameter="method"><forward name="topic_list" path="/WEB-INF/pages/test/test/topic_list.jsp"/></action>访问方式： http://192.168.0.1/topic.do?method=list&pagecount=1&pagesize=10