91---Criteria的內連結，分頁，查詢唯一物件，條件查詢，分組統計，投影查詢，DetachedCriteria
================Criteria分頁加動態查詢方法======================================
public PageInfo<Auction> select(Auction condition, int pageIndex){
DetachedCriteria dc = DetachedCriteria.forClass(Auction.class);
Criteria c = session.createCriteria(Auction.class);//建立一次查詢
Criteria c1 = session.createCriteria(Auction.class);//建立一次查詢
c.addOrder(Order.desc("auctionstarttime"));//新增查詢條件-----------注意非空處理----------排序
c.add(Restrictions.ge("auctionstartprice",condition.getAuctionstartprice()));----------比較大小
c.add(Restrictions.ilike("auctiondesc", condition.getAuctiondesc(),MatchMode.ANYWHERE));----------模糊查詢
Set<Integer> settype=new HashSet<Integer>();c.add(Restrictions.in( "movId",settype)); //--------編號在集合陣列中
PageInfo<Auction> pageInfo = new PageInfo<Auction>();//例項分頁方法
int count = (Integer) c1.setProjection(Projections.rowCount()).uniqueResult();//得到總條數
pageInfo.setCount(count);//設定總條數
pageInfo.setPageIndex(pageIndex);//設定當前頁碼
c.setMaxResults(PageInfo.PAGESIZE);//設定每次的查詢數量
c.setFirstResult((pageIndex - 1) * PageInfo.PAGESIZE);//設定起始條數
List<Auction> list = c.list();
pageInfo.setPageList(list);//將查詢的結果付給查詢的實體類
}
===============================分頁實體類======================================
public class PageInfo<T> { //利用泛型宣告一個分頁的實體類
public static final int PAGESIZE = 10;
private Integer count;// 總記錄數
private List<T> pageList;// 當前頁的記錄集合
private Integer pageIndex;// 當前頁號
private Integer totalPages;// 總頁數
public Integer getTotalPages() {//特殊方法，通過總條數和每頁的條數得到頁數
this.totalPages = this.count / this.PAGESIZE;
if (this.count % this.PAGESIZE != 0)
this.totalPages++;
return this.totalPages;
}
}
===============================分頁關於時間的處理======================================
---對映檔案-------關於時間的處理---------------
<property name="auctionstarttime" type="java.sql.Timestamp">
<column name="AUCTIONSTARTTIME" length="11" not-null="true" />
</property>
---實體類-------關於時間的處理---------------
private Timestamp auctionstarttime;、
---資料庫-------關於時間的處理---------------
AUCTIONSTARTTIME TIMESTAMP(6)
---方法內使用-------關於時間的處理---------------
======表單賦值
<label for="time">開始時間</label>
<input name="auctionStartTime" type="text" id="time" class="nwinput"/>
======提取：輸入的時間按字串轉化為date,後提取毫秒數，轉化為java.sql.Timestamp
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()));
}
======底層
if (condition.getAuctionstarttime() != null) {
c.add(Restrictions.ge("auctionstarttime",
condition.getAuctionstarttime()));
c1.add(Restrictions.ge("auctionstarttime",
condition.getAuctionstarttime()));
}
===============================servlet的呼叫方法以及獲得返回值======================================
int pageIndex=1;//登陸介面進入
if(request.getParameter("pageIndex")!=null){
pageIndex=new Integer(request.getParameter("pageIndex")).intValue();//
}Auction condition=new Auction();
PageInfo<Auction> auctionPageinfo = biz.find(condition,pageIndex);
request.setAttribute("auctionPageInfo", auctionPageinfo);
request.getRequestDispatcher("auctionList.jsp").forward(request, response);
===============================jsp頁面======================================
---------頁碼顯示------------------------------------------------------------------------------
<a href="javascript:goToPage(1)">首頁</a>
<c:if test="${auctionPageinfo.pageIndex!=1}">
<a href="javascript:goToPage(${auctionPageinfo.pageIndex-1 })">上一頁</a>
</c:if>
當前頁：${auctionPageinfo.pageIndex}
<c:forEach step="1" begin="1" end="${auctionPageInfo.totalPages}" var="pageIndex">
<a href="javascript:goToPage(${pageIndex})">${pageIndex}</a>
</c:forEach>
<c:if test="${auctionPageinfo.pageIndex!=auctionPageinfo.totalPages}">
<a href="javascript:goToPage(${auctionPageinfo.pageIndex+1 })">下一頁</a>
</c:if>
<a href="javascript:goToPage(${auctionPageinfo.totalPages})" >尾頁</a>
------------------
<script type="text/javascript">
function goToPage(pageIndex){
document.forms[0].action=document.forms[0].action+"?pageIndex="+pageIndex;
document.forms[0].submit();
}
</script>
---------動態查詢表單------------------------------------------------------------------------------
<form action="goodservlet?opr=list&ad=u" method="post">
<label for="name">名稱</label>
<input name="auctionname" type="text" class="nwinput" id="name" value="${param.auctionname}"/>
<label for="names">描述</label>
<input name="auctiondesc" type="text" id="names" class="nwinput" value="${param.auctiondesc}"/>
<label for="time">開始時間</label>
<input name="auctionstarttime" type="text" id="time" class="nwinput" value="${param.auctionstarttime}"/>
<label for="end-time">結束時間</label>
<input name="auctionendtime" type="text" id="end-time" class="nwinput" value="${param.auctionendtime}"/>
<label for="price">起拍價</label>
<input name="auctionstartprice" type="text" id="price" class="nwinput" value="${param.auctionstartprice}"/>
<input name="" type="submit" value="查詢" class="spbg buttombg f14 sale-buttom"/>
</form>
---------詳細資訊顯示------------------------------------------------------------------------------
<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="${sessionScope.user.userisadmin==true }">
修改|
刪除
</c:if>
<c:if test="${sessionScope.user.userisadmin==false }">
<a href="auctionDetail?auctionId=${auction.auctionid }">競拍</a>
</c:if>
</li>
</ul>
</c:forEach>