自定义标签：分页标签
一、标签类源代码public class PageNavigationBarTag extends BaseBodyTagSupport {private String pageBean;private String actionName;public String getPageBean() {return pageBean;}public void setPageBean(String pageBean) {this.pageBean = pageBean;}public String getActionName() {return actionName;}public void setActionName(String actionName) {this.actionName = actionName;}public int doEndTag() throws JspException {if(CommonUtil.isEmpty(pageBean)){throw new JspException("pageBean must not be null");}Page page = null;Map params = null;try{page = (Page)getValueStack().findValue(pageBean);params = RequestUtil.getParameterMap(getRequest(), "");}catch(Exception e){throw new JspException(e);}Map dataModel = new HashMap();dataModel.put("page", page);dataModel.put("params", params);dataModel.put("actionName", CommonUtil.trim(actionName));try{String ret = render(pageContext.getServletContext(), dataModel, "taglib/PageNavigationBar.ftl");pageContext.getOut().println(ret);}catch(Exception ex){throw new JspException(ex);}return EVAL_PAGE;}}
二、Page类源代码
public class Page {private int pageIndex = 0; //当前页号private int pageSize = 15; //每页记录数private int pageCount = 0; //总页数private int rowCount = 0; //总记录数private List result = null; //页数据public Page(){}public Page(List result, int rowCount, int pageIndex, int pageSize){this.result = result;this.rowCount = rowCount;this.pageIndex = pageIndex;this.pageSize = pageSize;updatePageCount();}public int getPageIndex() {return pageIndex;}public int getPageSize() {return pageSize;}public int getPageCount() {return pageCount;}public int getRowCount() {return rowCount;}private void updatePageCount() {if(rowCount <= 0){rowCount = 0;}else{int count = rowCount / pageSize;if(rowCount % pageSize > 0){count++;}pageCount = count;}}public List getResult() {return result;}}
三、公共方法源代码
public static Map getParameterMap(HttpServletRequest request, String prefix){Map p = new HashMap();Map paramsMap = request.getParameterMap();for(Iterator it=paramsMap.keySet().iterator();it.hasNext();){String key = (String)it.next();String value = request.getParameter(key);if(CommonUtil.isEmpty(value)) continue;if(CommonUtil.isEmpty(prefix)){p.put(key, value);}else{if(key.startsWith(prefix)){p.put(key, value);}}}return p;}
四、分页方法源代码
public Page findPageByCriteria(final DetachedCriteria dc, final int pageIndex, final int pageSize) {return (Page)getHibernateTemplate().execute(new HibernateCallback(){public Object doInHibernate(Session session) throws HibernateException, SQLException {Criteria c = dc.getExecutableCriteria(session);int firstResult = (pageIndex - 1) * pageSize;//记录总数int rowCount = ((Integer)c.setProjection(Projections.rowCount()).uniqueResult()).intValue();//复位c.setProjection(null);c.setResultTransformer(CriteriaSpecification.ROOT_ENTITY); //将结果类型转换为原实体类型//记录集List result = c.setFirstResult(firstResult).setMaxResults(pageSize).list();//页对象Page page = new Page(result, rowCount, pageIndex, pageSize);return page;}}, true);}
五、FTL模板源代码
<script language="javascript">function chnageCurrentPage(_pageIndex){var frm = document.all["frmPageNavigationBar"];var objPageIndex = frm.pageIndex;if(objPageIndex==null){objPageIndex = document.createElement("<input type='hidden' name='pageIndex' value='" + _pageIndex + "'/>");frm.appendChild(objPageIndex);}else{objPageIndex.value = _pageIndex;}frm.submit();}</script><form name="frmPageNavigationBar" method="post" action="${actionName}"><#if params?has_content><!-- 所有请求参数包含在页导航条的Form中 --><#list params?keys as key><input type="hidden" name="${key}" value="${params}" /></#list></#if><table border="0" cellspacing="0" cellpadding="0" class="width9x" align="center"><tr><td>第 ${page.pageIndex?string("####")} 页/共 ${page.pageCount?string("####")} 页。找到 ${page.rowCount?string("####")} 条记录。</td><td> </td><td align="right" nowrap width="150"><#if page.pageIndex gt 1><a href="#" ><img src="images/pager/page-first.gif" border="0" alt="首页"></a><a href="#" ><img src="images/pager/page-prev.gif" border="0" alt="上一页"></a><#else><img src="images/pager/page-first-disabled.gif" border="0" alt="首页"><img src="images/pager/page-prev-disabled.gif" border="0" alt="上一页"></#if><select name="pageIndexList" onchange="chnageCurrentPage(this.options.value)";><#list 1..page.pageCount as x><option value="${x}">${x}</option></#list></select> <#if page.pageIndex lt page.pageCount><a href="#" ><img src="images/pager/page-next.gif" border="0" alt="下一页"></a><a href="#" ><img src="images/pager/page-last.gif" border="0" alt="末页"></a><#else><img src="images/pager/page-next-disabled.gif" border="0" alt="下一页"><img src="images/pager/page-last-disabled.gif" border="0" alt="末页"></#if></td></tr></table></form> 六、tld配置
<tag><name>pageNavigationBar</name><tag-class>com.cjm.web.taglib.PageNavigationBarTag</tag-class><body-content>JSP</body-content><attribute><name>pageBean</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute><attribute><name>actionName</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute></tag>
七、业务方法源代码
DetachedCriteria dc = DetachedCriteria.forClass(User.class);if(user != null){CriteriaUtil.eq(dc, "username", user.getUsername());CriteriaUtil.like(dc, "fullname", user.getFullname());CriteriaUtil.eq(dc, "mobilephone", user.getMobilephone());CriteriaUtil.eq(dc, "enabledTemp", user.getEnabledTemp());if(user.getOrg() != null) CriteriaUtil.eq(dc, "org.orgId", user.getOrg().getOrgId());}dc.addOrder(Order.asc("username"));Page page = getBaseService().findPageByCriteria(dc, getPageIndex(), 15);getValueStack().set("page", page);
八、JSP页面源代码
<s:iterator value="page.result" id="user" status="st"><tr <s:if test="#st.odd">class="bg1"</s:if><s:else>class="bg2"</s:else>><td align="center"><input type="checkbox" name="chk_o_<s:property value='#st.count'/>" value="<s:property value='#user.username'/>"></td><td align="left"> <s:property value="#user.username"/></td><td align="left"> <s:property value="#user.fullname"/></td><td align="left"> <s:property value="#user.org.name"/></td><td align="left"> <s:property value="#user.mobilephone"/></td><td> <s:property value="#user.gender"/></td><td> <s:property value="#user.enabledTemp"/></td><td align="center"><a href="#" #user.username"/>'),void(0);">查看</a></td></tr></s:iterator><cjm:pageNavigationBar pageBean="page" actionName="userList.action"/>
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