封装页面的信息，进行了泛型。
PageInfo.java
1 package cn.jbit.auction.entity; 2 3 import java.util.List; 4 /** 5 * 分页封装类 6 */ 7 public class PageInfo<T> {//此处进行了泛型<T>,使用与所有的对象 8 public static final int PAGESIZE = 3; 9 private Integer count;// 总记录数 10 private List<T> pageList;// 当前页的记录集合 11 private Integer pageIndex;// 当前页号 12 private Integer totalPages;// 总页数 13 14 public Integer getCount() { 15 return count; 16 } 17 18 public void setCount(Integer count) { 19 this.count = count; 20 } 21 22 public List<T> getPageList() { 23 return pageList; 24 } 25 26 public void setPageList(List<T> pageList) { 27 this.pageList = pageList; 28 } 29 30 public Integer getPageIndex() { 31 return pageIndex; 32 } 33 34 public void setPageIndex(Integer pageIndex) { 35 this.pageIndex = pageIndex; 36 } 37 38 public Integer getTotalPages() { 39 this.totalPages = this.count / this.PAGESIZE; 40 if (this.count % this.PAGESIZE != 0) 41 this.totalPages++; 42 return this.totalPages; 43 } 44 45 }
jsp页面auctionList.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <link href="css/common.css" rel="stylesheet" type="text/css" /> <link href="css/style.css" rel="stylesheet" type="text/css" /> <script type="text/javascript"> function goToPage(pageIndex){ document.forms[0].action=document.forms[0].action+"?pageIndex="+pageIndex; document.forms[0].submit(); } </script> </head> <body> <form method="post" action="auctionList"> <div class="wrap"> <!-- main begin--> <div class="sale"> <h1 class="lf">在线拍卖系统</h1> <c:if test="${not empty sessionScope.user}"> <div class="logout right"><a href="doLogout" title="注销">注销</a></div> </c:if> <c:if test="${empty sessionScope.user}"> <div class="logout right"><a href="login.jsp" title="登录">登录</a></div> </c:if> </div> <div class="forms"> <label for="name">名称</label> <input name="auctionName" type="text" class="nwinput" id="name"/> <label for="names">描述</label> <input name="auctionDesc" type="text" id="names" class="nwinput"/> <label for="time">开始时间</label> <input name="auctionStartTime" type="text" id="time" class="nwinput"/> <label for="end-time">结束时间</label> <input name="auctionEndTime" type="text" id="end-time" class="nwinput" /> <label for="price">起拍价</label> <input name="auctionStartPrice" type="text" id="price" class="nwinput" /> <input type="submit" value="查询" class="spbg buttombg f14 sale-buttom"/> <c:if test="${sessionScope.user.userisadmin==true}"> <input type="button" onclick="location='addAuction.jsp'" value="发布" class="spbg buttombg f14 sale-buttom buttomb"/> </c:if> <br/> <c:if test="${sessionScope.user.userisadmin==false}"> <a href="auctionResult"><b>查看竞拍结果</b></a> </c:if> </div> <div class="items"> <ul class="rows even strong"> <li>名称</li> <li class="list-wd">描述</li> <li>开始时间</li> <li>结束时间</li> <li>起拍价</li> <li class="borderno">操作</li> </ul> <c:forEach items="${requestScope.auctionPageInfo.pageList }" var="auction"> <ul class="rows"> <li>${auction.auctionname }</li> <li class="list-wd">${auction.auctiondesc }</li> <li>${auction.auctionstarttime }</li> <li>${auction.auctionendtime }</li> <li>${auction.auctionstartprice }</li> <li class="borderno red"> <c:if test="${sessionScope.user.userisadmin==true }"> 修改| 删除 </c:if> <c:if test="${sessionScope.user.userisadmin==false }"> <a href="auctionDetail?auctionId=${auction.auctionid }">竞拍</a> </c:if> </li> </ul> </c:forEach> <div class="page"> <a href="javascript:goToPage(1)">首页</a> <c:if test="${requestScope.auctionPageInfo.pageIndex!=1}"> <a href="javascript:goToPage(${requestScope.auctionPageInfo.pageIndex-1 })">上一页</a> </c:if> <c:forEach step="1" begin="1" end="${requestScope.auctionPageInfo.totalPages }" var="pageIndex"> <a href="javascript:goToPage(${pageIndex })">${pageIndex }</a> </c:forEach> <c:if test="${requestScope.auctionPageInfo.pageIndex!=requestScope.auctionPageInfo.totalPages}"> <a href="javascript:goToPage(${requestScope.auctionPageInfo.pageIndex+1 })">下一页</a> </c:if> <a href="javascript:goToPage(${requestScope.auctionPageInfo.totalPages })" >尾页</a> </div> </div> <!-- main end--> </div> </form> </body> </html>
Servlet页面
AuctionListServlet
package cn.jbit.auction.web; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import cn.jbit.auction.biz.IAuctionBiz; import cn.jbit.auction.biz.impl.AuctionBizImpl; import cn.jbit.auction.entity.Auction; import cn.jbit.auction.entity.PageInfo; import cn.jbit.auction.util.Tool; public class AuctionListServlet extends EncodingServlet { public AuctionListServlet() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { IAuctionBiz biz = new AuctionBizImpl(); int pageIndex=1; if(request.getParameter("pageIndex")!=null){ pageIndex=new Integer(request.getParameter("pageIndex")).intValue(); } Auction condition=new Auction(); if(request.getParameter("auctionName")!=null&&!"".equals(request.getParameter("auctionName"))){ condition.setAuctionname(request.getParameter("auctionName")); } if(request.getParameter("auctionDesc")!=null&&!"".equals(request.getParameter("auctionDesc"))){ condition.setAuctiondesc(request.getParameter("auctionDesc")); } if(request.getParameter("auctionStartTime")!=null&&!"".equals(request.getParameter("auctionStartTime"))){ condition.setAuctionstarttime(new java.sql.Timestamp(Tool.strToDate(request.getParameter("auctionStartTime"), "yyyy-MM-dd HH:mm:dd").getTime())); } if(request.getParameter("auctionEndTime")!=null&&!"".equals(request.getParameter("auctionEndTime"))){ condition.setAuctionendtime(new java.sql.Timestamp(Tool.strToDate(request.getParameter("auctionEndTime"), "yyyy-MM-dd HH:mm:dd").getTime())); } if(request.getParameter("auctionStartPrice")!=null&&!"".equals(request.getParameter("auctionStartPrice"))){ condition.setAuctionstartprice(new Double(request.getParameter("auctionStartPrice"))); } PageInfo<Auction> auctionPageinfo = biz.find(condition,pageIndex); request.setAttribute("auctionPageInfo", auctionPageinfo); request.getRequestDispatcher("auctionList.jsp").forward(request, response); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); request.setAttribute("message", e.getMessage()); request.getRequestDispatcher("error.jsp").forward(request,response); } } public void init() throws ServletException { // Put your code here } }
dao层的实现方法
public PageInfo<Auction> select(Auction condition, int pageIndex) throws Exception { PageInfo<Auction> pageInfo = new PageInfo<Auction>(); Session session = HibernateUtil.currentSession(); DetachedCriteria dc = DetachedCriteria.forClass(Auction.class); Criteria c = session.createCriteria(Auction.class);// 用于列表 Criteria c1 = session.createCriteria(Auction.class);// 用于查询总记录数 if (condition.getAuctionname() != null && !condition.getAuctionname().equals("")) { c.add(Restrictions.ilike("auctionname", condition.getAuctionname(), MatchMode.ANYWHERE)); c1.add(Restrictions.ilike("auctionname", condition.getAuctionname(), MatchMode.ANYWHERE)); } if (condition.getAuctiondesc() != null && !"".equals(condition.getAuctiondesc())) { c.add(Restrictions.ilike("auctiondesc", condition.getAuctiondesc(), MatchMode.ANYWHERE)); c1.add(Restrictions.ilike("auctiondesc", condition.getAuctiondesc(), MatchMode.ANYWHERE)); } if (condition.getAuctionstarttime() != null) { c.add(Restrictions.ge("auctionstarttime", condition.getAuctionstarttime())); c1.add(Restrictions.ge("auctionstarttime", condition.getAuctionstarttime())); } if (condition.getAuctionendtime() != null) { c.add(Restrictions.le("auctionendtime", condition.getAuctionendtime())); c1.add(Restrictions.le("auctionendtime", condition.getAuctionendtime())); } if (condition.getAuctionstartprice() != null) { c.add(Restrictions.ge("auctionstartprice", condition.getAuctionstartprice())); c1.add(Restrictions.ge("auctionstartprice", condition.getAuctionstartprice())); } c.addOrder(Order.desc("auctionstarttime")); // 总记录数 int count = (Integer) c1.setProjection(Projections.rowCount()) .uniqueResult(); pageInfo.setCount(count); // 当前页号 pageInfo.setPageIndex(pageIndex); // 分页 // 每页显示的记录数 c.setMaxResults(PageInfo.PAGESIZE); c.setFirstResult((pageIndex - 1) * PageInfo.PAGESIZE); List<Auction> list = c.list(); pageInfo.setPageList(list); return pageInfo; }
dao层接口
PageInfo<Auction> select(Auction condition,int pageIndex) throws Exception;
biz层的实现方法
public PageInfo<Auction> find(Auction condition,int pageIndex) throws Exception { return this.dao.select(condition, pageIndex); }
biz层的接口
PageInfo<Auction> find(Auction condition,int pageIndex) throws Exception;