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如何在Struts中實(shí)現(xiàn)分頁顯示數(shù)據(jù)(2)

由于篇幅較長，所以分開兩篇來寫。下面是我的一個(gè)實(shí)際例子，從數(shù)據(jù)庫中分頁獲取管理員的數(shù)據(jù)，然后在JSP頁面上表示出來。
我的Action的代碼：

import java.util.List;
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import javax.servlet.http.*;
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import org.apache.struts.action.*;
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import xxx.Administrator;
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import xxx.TurnPageForm;
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import xxx.PageData;
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/**
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* <p>Title: </p>
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*
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* <p>Description: </p>
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*
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* <p>Copyright: Copyright (c) 2003</p>
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*
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* <p>Company: </p>
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*
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* @author George Hill
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* @version 1.0
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*/
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public class AdminListAction extends Action {
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private static final int NUMBER = 15;
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/**
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* 執(zhí)行管理員列表操作
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* @param mapping ActionMapping
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* @param form ActionForm
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* @param request HttpServletRequest
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* @param response HttpServletResponse
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* @throws Exception
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* @return ActionForward
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*/
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public ActionForward execute(ActionMapping mapping, ActionForm form,
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HttpServletRequest request,
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HttpServletResponse response) throws Exception {
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HttpSession session = request.getSession();
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//獲取頁碼
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String pageStr = request.getParameter("page");
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if (pageStr == null)
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pageStr = String.valueOf(session.getAttribute("page"));
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else
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session.setAttribute("page", pageStr);
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int page = 1;
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try {
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page = Integer.parseInt(pageStr);
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} catch (NumberFormatException nfe) {
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}
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//獲得總記錄數(shù)
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int count = Administrator.countAllAdministrators();
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int maxPage = count / NUMBER;
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if (count % NUMBER != 0)
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maxPage++;
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//獲得列表
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List list = Administrator.getAdministrators(NUMBER, (page - 1) * NUMBER);
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if (count != 0 && list == null)
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list = Administrator.getAdministrators(NUMBER, 0);
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if (list != null) {
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PageData data = new PageData(list, page, maxPage);
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request.setAttribute("admins", data);
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}
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//分頁部分
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TurnPageForm tform = new TurnPageForm();
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tform.setCurrentPage(page);
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tform.setMaxPage(maxPage);
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request.setAttribute("turnPageForm", tform);
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return mapping.findForward("list");
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}
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}
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JSP頁面部分的代碼片斷：

<logic:present name="admins">
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<table width="90%" border="0" align="center" cellpadding="0" cellspacing="1" class="table6">
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<tr align="center" class="table4">
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<td width="10%" height="18" align="center" nowrap class="head1"><bean:message key="list.index"/></td>
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<td width="20%" class="head1" align="center" nowrap><bean:message key="admin.account"/></td>
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<td width="30%" class="head1" align="center" nowrap><bean:message key="admin.name"/></td>
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<td width="10%" class="head1" align="center" nowrap><bean:message key="admin.status"/></td>
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<td width="30%" class="head1" align="center" nowrap><bean:message key="list.action"/></td>
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</tr>
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<logic:iterate name="admins" property="list" id="entry" indexId="index">
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<tr class="table5" onmouseover="changeColor(this, '#99CCFF')" onmouseout="changeColor(this, '#F2F3F4')">
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<td align="center" nowrap><bean:write name="index"/></td>
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<td align="center" nowrap><bean:write name="entry" property="account"/></td>
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<td align="center" nowrap><bean:write name="entry" property="name"/></td>
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<logic:equal name="entry" property="status" value="true">
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<td align="center" nowrap><bean:message key="status.enable"/></td>
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<td align="center" nowrap>
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<html:link page="/disableAdmin.do?status=false" paramId="account" paramName="entry" paramProperty="account" onclick="return MM_popupDisableMsg()">
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<font color="red"><bean:message key="status.disable"/></font>
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</html:link>
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<html:link page="/modifyAdmin.do?action=link" paramId="account" paramName="entry" paramProperty="account">
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<bean:message key="action.modify"/>
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</html:link>
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<html:link action="/deleteAdmin" paramId="account" paramName="entry" paramProperty="account" onclick="return MM_popupDelMsg()">
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<font color="red"><bean:message key="action.delete"/></font>
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</html:link>
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</td>
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</logic:equal>
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<logic:equal name="entry" property="status" value="false">
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<td align="center" nowrap><font color="red"><bean:message key="status.disable"/></font></td>
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<td align="center" nowrap>
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<html:link page="/enableAdmin.do?status=true" paramId="account" paramName="entry" paramProperty="account">
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<bean:message key="status.enable"/>
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</html:link>
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<html:link page="/modifyAdmin.do?action=link" paramId="account" paramName="entry" paramProperty="account">
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<bean:message key="action.modify"/>
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</html:link>
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<html:link action="/deleteAdmin" paramId="account" paramName="entry" paramProperty="account" onclick="return MM_popupDelMsg()">
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<font color="red"><bean:message key="action.delete"/></font>
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</html:link>
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</td>
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</logic:equal>
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</tr>
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</logic:iterate>
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</table>
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<table width="90%" border="0" align="center" cellpadding="3" cellspacing="0">
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<tr>
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<td align="left"></td>
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<html:form action="/turnPage" method="POST">
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<td align="right" nowrap>
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<html:hidden property="url" value="/listAdmin.do"/>
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<html:hidden property="currentPage"/>
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<html:hidden property="maxPage"/>
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<bean:message key="page.the"/>
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<bean:write name="admins" property="page"/>
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<bean:message key="page.page"/>/
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<bean:message key="page.all"/><bean:write name="admins" property="maxPage"/><bean:message key="page.page"/>
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<bean:message key="page.turn"/>
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<logic:equal name="admins" property="maxPage" value="1">
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<html:text property="page" styleClass="input_log" styleId="page" size="3" value="" disabled="true"/>
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<html:submit property="turn" styleClass="t_input" styleId="turn" value="GO" disabled="true"/>
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</logic:equal>
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<logic:notEqual name="admins" property="maxPage" value="1">
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<html:text property="page" styleClass="input_log" styleId="page" size="3" value=""/>
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<html:submit property="turn" styleClass="t_input" styleId="turn" value="GO"/>
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</logic:notEqual>
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<logic:equal name="admins" property="firstPage" value="true">
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<html:submit property="first" styleClass="t_input" styleId="first" disabled="true"><bean:message key="page.first"/></html:submit>
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<html:submit property="preview" styleClass="t_input" styleId="preview" disabled="true"><bean:message key="page.previous"/></html:submit>
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</logic:equal>
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<logic:notEqual name="admins" property="firstPage" value="true">
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<html:submit property="first" styleClass="t_input" styleId="first"><bean:message key="page.first"/></html:submit>
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<html:submit property="preview" styleClass="t_input" styleId="preview"><bean:message key="page.previous"/></html:submit>
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</logic:notEqual>
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<logic:equal name="admins" property="lastPage" value="true">
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<html:submit property="next" styleClass="t_input" styleId="next" disabled="true"><bean:message key="page.next"/></html:submit>
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<html:submit property="last" styleClass="t_input" styleId="last" disabled="true"><bean:message key="page.last"/></html:submit>
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</logic:equal>
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<logic:notEqual name="admins" property="lastPage" value="true">
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<html:submit property="next" styleClass="t_input" styleId="next"><bean:message key="page.next"/></html:submit>
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<html:submit property="last" styleClass="t_input" styleId="last"><bean:message key="page.last"/></html:submit>
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</logic:notEqual>
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</td>
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</html:form>
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</tr>
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</table>
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</logic:present>

實(shí)際的頁面效果圖：

OK，我的整個(gè)實(shí)現(xiàn)就完成了。我覺得有許多地方還是需要完善的，例如我的實(shí)現(xiàn)不夠抽象，而且覺得繁瑣了點(diǎn)，不過我一直都用著，還沒有碰到過什么問題。請各位看完以后多多指教。

posted on 2005-05-13 11:33 小米閱讀(4847) 評論(25) 編輯收藏所屬分類: Struts

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