首先，两个工具类：
第一个TotalRecord,用来存放分页条件和查询出的数据
import java.util.List; public class TotalRecord { private List entities; //总条数 private long totalCount=0; //当前页 private int currentPage=1; //每页显示数量 private int pageSize = 10; //总页数 private long totalPage=0; public TotalRecord(){ } public TotalRecord(int currentPage){ this.currentPage = currentPage; } public TotalRecord(int currentPage,int pageSize){ this.currentPage = currentPage; this.pageSize = pageSize; } public TotalRecord(int currentPage,int pageSize,int totalCount ){ this.currentPage = currentPage; this.pageSize = pageSize; this.totalCount=totalCount; } public List getEntities() { return entities; } public void setEntities(List entities) { this.entities = entities; } public long getTotalCount() { return totalCount; } public void setTotalCount(long totalCount) { this.totalCount = totalCount; } public int getFirstIndex() { return (currentPage - 1)*pageSize; } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public long getTotalPage() { this.totalPage = this.totalCount%pageSize==0?this.totalCount/pageSize:this.totalCount/pageSize+1; return this.totalPage; } }
第二个PageIndex,存放分页工具条信息
public class PageIndex { private long startindex; private long endindex; public PageIndex(long startindex, long endindex) { this.startindex = startindex; this.endindex = endindex; } public long getStartindex() { return startindex; } public void setStartindex(long startindex) { this.startindex = startindex; } public long getEndindex() { return endindex; } public void setEndindex(long endindex) { this.endindex = endindex; } /** * * @param viewpagecount 显示页码数 * @param currentPage 当前页 * @param totalpage 总页数 * @return */ public static PageIndex getPageIndex(long viewpagecount, int currentPage, long totalpage){ long startpage = currentPage-(viewpagecount%2==0? viewpagecount/2-1 : viewpagecount/2); long endpage = currentPage+viewpagecount/2; if(startpage<1){ startpage = 1; if(totalpage>=viewpagecount) endpage = viewpagecount; else endpage = totalpage; } if(endpage>totalpage){ endpage = totalpage; if((endpage-viewpagecount)>0) startpage = endpage-viewpagecount+1; else startpage = 1; } return new PageIndex(startpage, endpage); } }
然后，是页面上的分页工具条，这里用一个jsp页面来做，使用的时候用<%@ include file="/util/PageBar.jsp" %>来将分页工具条包含在页面里：
<%@ page language="java" pageEncoding="UTF-8"%> <a href="javascript:toPage(1)" mce_href="javascript:toPage(1)">首页</a> <s:if test="#request.tr.currentPage!=1"> <a href='javascript:toPage(<s:property value="#request.tr.currentPage-1"></a>)'>上一页</a> </s:if> <s:bean name="org.apache.struts2.util.Counter" id="counter"> <s:param name="first" value="#request.pi.startindex" /> <s:param name="last" value="#request.pi.endindex" /> <s:iterator> <s:if test="#counter.current-1==#request.tr.currentPage"> <s:property/> </s:if> <s:else> <a href="javascript:toPage(<s:property></a>)"><s:property/></a> </s:else> </s:iterator> </s:bean> <s:if test="#request.tr.currentPage!=#request.tr.totalPage"> <a href='javascript:toPage(<s:property value="#request.tr.currentPage+1"></a>)'>下一页</a> </s:if> <a href="javascript:toPage(<s:property value=" mce_href="javascript:toPage(<s:property value="#request.tr.totalPage"></a>)">尾页</a>
工具条里面，翻页会用到javascript方法：toPage,此方法写在页面里，因为不同的页面处理跳转可能会有不同。
function toPage(currentPage){ var form = document.forms[0]; form.page.value = currentPage; form.submit(); }
toPage方法使页面上的某个form提交数据，把页码作为参数传入后台action中
<form action="user_getUsers" method="post"> <input type="hidden" name="page"/> </form>
action代码：public String getUsers(){ int page =1; if(request.getParameter("page")!=null&&request.getParameter("page")!=""){ page =Integer.parseInt(request.getParameter("page").toString()); } TotalRecord tr = new TotalRecord(); //tr.setEntities(list); tr.setCurrentPage(page); tr.setPageSize(5); tr.setEntities(userbiz.getUsers(tr)); tr.setTotalCount(100); PageIndex pi = PageIndex.getPageIndex(10, tr.getCurrentPage(),tr.getTotalPage()); request.setAttribute("tr", tr); request.setAttribute("pi", pi); return SUCCESS; }
