pagination.jsp

来自「一个很好的开源项目管理系统源代码」· JSP 代码 · 共 147 行

<%@ page import="java.util.List,
                javax.servlet.jsp.PageContext,
                org.apache.taglibs.datagrid.Page" %>
<%
  /*
   * Unfortunately the datagrid does not expose all the variables we need for the 
   * page navigations. Need this to create navigations links for  'lastPage' 
   * 'firstpage' and the page links.
   */
   int pageSize = ((Integer)request.getAttribute("pageSize")).intValue();
   int rowCount = ((Integer)request.getAttribute("rowCount")).intValue();
  List pageList= (List) pageContext.getAttribute("pages");
  if (pageList != null && pageList.size() > 0){
    pageContext.setAttribute("first", ((Page)pageList.get(0)).getUrl());
    pageContext.setAttribute("last", ((Page)pageList.get(pageList.size()-1)).getUrl());
    int currentPageIdx = 0;
    String rowIdxStr = (String) request.getParameter("p_datagrid_app_page_index");
    if (rowIdxStr != null)
        currentPageIdx= new Integer(rowIdxStr).intValue()/pageSize;
    pageContext.setAttribute("currentPageIdx", new Integer(currentPageIdx));
    // Number of page links to be displayed.
    int LINK_COUNT = 8;
    int beginPageIdx = currentPageIdx - (currentPageIdx%LINK_COUNT);
    int endPageIdx = beginPageIdx + LINK_COUNT -1;
    if (endPageIdx > pageList.size()-1)
       endPageIdx = pageList.size()-1;
    pageContext.setAttribute("beginPageIdx", new Integer(beginPageIdx));
    pageContext.setAttribute("endPageIdx", new Integer(endPageIdx));
    pageContext.setAttribute("beginRow", new Integer(currentPageIdx*pageSize +1));
    int endRow = currentPageIdx * pageSize  + pageSize;
    if (endRow > rowCount)
       endRow = rowCount;
    pageContext.setAttribute("endRow", new Integer(endRow));
    String more = "";
    if (endPageIdx < pageList.size()-1)
       more = "...";
    pageContext.setAttribute("more", more);
  }
%>
<%-- Display the page navigations --%>
<br />
<c:choose>
  <c:when test='${empty pages}' >
    <fmt:message key="paging.item.noDataFound"/>
  </c:when>
  <c:otherwise>
    <c:choose>
      <c:when test='${rowCount == 1 }' >
        <fmt:message key="paging.item.oneFound"/>
      </c:when>
      <c:otherwise>
        <c:choose>
          <c:when test='${rowCount <= pageSize }' >
            <fmt:message key="paging.item.allFound"/>
          </c:when>
          <c:otherwise>
            <fmt:message key="paging.item.banner">
            <fmt:param value="${rowCount}" />
            <fmt:param value="${beginRow}" />
            <fmt:param value="${endRow}" />
            </fmt:message>
            <br />
            <%-- add "rowCount" parameter to the urls if  not present --%>
            <c:choose>
              <c:when test='${empty param.rowCount}' >
                <c:set var="nextUrl" value="${next}&rowCount=${rowCount}" />
                <c:set var="previousUrl" value="${previous}&rowCount=${rowCount}" />
                <c:set var="firstUrl" value="${first}&rowCount=${rowCount}" />
                <c:set var="lastUrl" value="${last}&rowCount=${rowCount}" />
               </c:when>
               <c:otherwise>
                 <c:set var="nextUrl" value="${next}" />
                 <c:set var="previousUrl" value="${previous}" />
                 <c:set var="firstUrl" value="${first}" />
                 <c:set var="lastUrl" value="${last}" />
               </c:otherwise>
             </c:choose>
             <div id="pagination" >
             <table>
             <tr>
             <td nowrap >
             <c:choose>
               <c:when test="${previous != null}">
                 <a href="<c:out value="${firstUrl}"/>">
                 <img src="<spring:theme code="firstOn.img" />" class="icon" alt="<spring:message code="firstOn.alt" />" /></a>
                 <a href="<c:out value="${previousUrl}"/>">
                 <img src="<spring:theme code="previousOn.img" />" class="icon" alt="<spring:message code="previousOn.alt" />" /></a>
               </c:when>
               <c:otherwise>
                 <img src="<spring:theme code="firstOff.img" />" class="icon" />
                 <img src="<spring:theme code="previousOff.img" />" class="icon" />
               </c:otherwise>
             </c:choose>
             </td>
             <td nowrap>
              &nbsp; &nbsp; &nbsp;
             <c:forEach items="${pages}" var="page" begin="${beginPageIdx}" end="${endPageIdx}" >
               <c:choose>
                 <c:when test="${page.current}">
                   <c:choose>
                     <c:when test='${empty param.rowCount}' >
                       <b><a href="<c:out value="${page.url}&rowCount=${rowCount}"/>"><c:out value="${page.index}"/></a></b>
                     </c:when>
                     <c:otherwise>
                       <b><a href="<c:out value="${page.url}"/>"><c:out value="${page.index}"/></a></b>
                     </c:otherwise>
                   </c:choose>
                 </c:when>
                 <c:otherwise>
                   <c:choose>
                     <c:when test='${empty param.rowCount}' >
                       <a href="<c:out value="${page.url}&rowCount=${rowCount}"/>"><c:out value="${page.index}"/></a>
                     </c:when>
                     <c:otherwise>
                       <a href="<c:out value="${page.url}"/>"><c:out value="${page.index}"/></a>
                     </c:otherwise>
                   </c:choose>
                 </c:otherwise>
               </c:choose>
             </c:forEach>
             <c:out value="${more}" />
             &nbsp; &nbsp; &nbsp;
             </td>
             <td nowrap>

             <c:choose>
               <c:when test="${next != null}">
                 <a href="<c:out value="${nextUrl}"/>">
                    <img src="<spring:theme code="nextOn.img" />" class="icon" alt="<spring:message code="nextOn.alt" />" /></a>
                 <a href="<c:out value="${lastUrl}"/>">
                   <img src="<spring:theme code="lastOn.img" />" class="icon" alt="<spring:message code="lastOn.alt" />" /></a>
                </c:when>
               <c:otherwise>
                 <img src="<spring:theme code="nextOff.img" />" class="icon" />
                 <img src="<spring:theme code="lastOff.img" />" class="icon" />
               </c:otherwise>
             </c:choose> 
             </td>
             </tr>
             </table>
             </div>
           </c:otherwise>
         </c:choose>
       </c:otherwise>
    </c:choose>
  </c:otherwise>
</c:choose>