JAVA分页代码实例

package com.hjf.web.view;






public class PageUtil ...{


private int pageSize;//每页显示的条数


private int recordCount;//总共的条数


private int currentPage;//当前页面




public PageUtil(int pageSize, int recordCount, int currentPage) ...{


this.pageSize = pageSize;


this.recordCount = recordCount;


setCurrentPage(currentPage);


}


//构造方法




public PageUtil(int pageSize, int recordCount) ...{


this(pageSize, recordCount, 1);


}


//总页数




public int getPageCount() ...{


int size = recordCount/pageSize;//总条数/每页显示的条数=总页数


int mod = recordCount % pageSize;//最后一页的条数


if(mod != 0)


size++;


return recordCount == 0 ? 1 : size;


}


//包含，起始索引为0




public int getFromIndex() ...{


//System.out.println("from index:"+(currentPage-1) * pageSize);


return (currentPage-1) * pageSize;


}


//不包含




public int getToIndex() ...{


//System.out.println("to index:"+Math.min(recordCount, currentPage * pageSize));


return Math.min(recordCount, currentPage * pageSize);


}


//得到当前页




public int getCurrentPage() ...{


return currentPage;


}//设置当前页




public void setCurrentPage(int currentPage) ...{


int validPage = currentPage <= 0 ? 1 : currentPage;


validPage = validPage > getPageCount() ? getPageCount() : validPage;


this.currentPage = validPage;


}//得到每页显示的条数




public int getPageSize() ...{


return pageSize;


}//设置每页显示的条数




public void setPageSize(int pageSize) ...{


this.pageSize = pageSize;


}//得到总共的条数




public int getRecordCount() ...{


return recordCount;


}//设置总共的条数




public void setRecordCount(int recordCount) ...{


this.recordCount = recordCount;


}


}

--------------------------------------------
下面的代码是放在jsp里面的
--------------------------------------------
<%
PublishersDAO dao = PublishersDAO.getInstance();
List records = dao.getModels();
String pageStr = request.getParameter("page");
int currentPage = 1;
if (pageStr != null)
currentPage = Integer.parseInt(pageStr);
PageUtil pUtil = new PageUtil(10, records.size(), currentPage);
currentPage = pUtil.getCurrentPage();
%>
-----------下面这个是放在有变量的上面---------------------------------
<%
for (int i = pUtil.getFromIndex(); i < pUtil.getToIndex(); i++) {
PublisherModel model = (PublisherModel) records.get(i);
%>
中间是删除修改之类的代码
<%}%>
------------这个是结尾的--------------------------
<tr><td width=100% bgcolor="#eeeeee" colspan=4 align="center">
记录总数<%=pUtil.getRecordCount()%>条 当前页/总页数<%=currentPage%>
/<%=pUtil.getPageCount()%>每页显示<%=pUtil.getPageSize()%>条
<a href="publishers.jsp?page=1">首页</a>
<a href="publishers.jsp?page=<%=(currentPage - 1)%>">上页</a>
<a href="publishers.jsp?page=<%=(currentPage + 1)%>">下页</a>
<a href="publishers.jsp?page=<%=pUtil.getPageCount()%>">末页</a>
</td></tr>
-----------------------------------------------