web开发中经常需要用到分页,我然来的做法是每次需要分页时都把代码copy一份,比如有10个页面有分页,那么我分页的代码就有10个版本.这样导致代码的重用性太低了.
那么如何解决呢?
把分页的页面和逻辑抽取出来,提高代码质量和重用性.
(1)分页的页面抽取出来
Java代码
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
- <%@ taglib prefix="s" uri="/struts-tags"%>
- <table style="height: 35px">
- <tr>
- <td nowrap="nowrap" style="width: 6%">
- <td nowrap="nowrap" style="width: 63%"><span>共<s:property
- value="view.totalRecords" />条记录, 当前第 <s:if
- test="view.totalPages==0">0</s:if> <s:else>
- <s:property value="view.currentPage" />
- </s:else>/ <s:property value="view.totalPages" />页, 每页<s:property
- value="view.recordsPerPage" />条记录
- </span></td>
- <td nowrap="nowrap">
- <button type="button" class="btn btn-info" style="padding: 1px 10px"
- onclick="toPageFirst(${param.action})">首页</button>
- <button type="button" class="btn btn-info" style="padding: 1px 10px"
- onclick="toPagePre(${param.action})">上一页</button>
- <button type="button" class="btn btn-info" style="padding: 1px 10px"
- onclick="toPageNext(${param.action})">下一页</button>
- <button type="button" class="btn btn-info" style="padding: 1px 10px"
- onclick="toPageLast(${param.action})">尾页</button>
- <button type="button" class="btn btn-info" style="padding: 1px 10px"
- onclick="toPageGo(${param.action})">转</button>
- <s:if test="view.totalPages==0">
- <input id="view.currentPage"
- name="view.currentPage" size="5"
- style="margin-bottom: 0px; width: 50px; ime-mode: disabled; text-align: right; padding: 0px 1px 0px 0px; height: 20px; display: inline-block"
- value="0" />
- </s:if> <s:else>
- <s:textfield cssClass="form-control" id="view.currentPage"
- name="view.currentPage" size="5"
- onkeypress="return onlyNumber(event);" onpaste="return false;"
- style="margin-bottom: 0px; width: 50px; ime-mode: disabled; text-align: right; padding: 0px 1px 0px 0px; height: 20px; display: inline-block"
- />
- </s:else>
- <input type="hidden" id="view.thisPage" value="<s:property value='view.currentPage' />" />
- <s:hidden id="view.totalPages" name="view.totalPages"></s:hidden>
- <s:hidden id="view.ascDesc" name="view.ascDesc"></s:hidden>
- <s:hidden id="view.sortKey" name="view.sortKey"></s:hidden>
- </td>
- <td nowrap="nowrap"><span>页</span></td>
- </tr>
- </table>
(2)在需要分页的页面中引入上述jsp文件
Java代码
- <s:include value="/WEB-INF/jsp/pageBottom.jsp">
- <s:param name="action">usercoupon.query</s:param>
- </s:include>
注意:必须包含在form表单中
(3)在后台action中
Java代码
- public String execute() throws Exception {
- reserveCondition();
- int start = (Integer.parseInt(view.getCurrentPage()) - 1)
- * view.getRecordsPerPage();
- int count = 0;
- DetachedCriteria clientVersionDC = DetachedCriteria
- .forClass(User.class);
- condition(clientVersionDC);
- List list = new ArrayList();
- count = this.userService.listByDetachedCriteria(list,
- clientVersionDC, start, view.getRecordsPerPage());
- view.setRecordList(list);
- queryResultList = new ArrayList();
- queryResultList.addAll(view.getRecordList());
- view.setTotalRecords(count);
- int totalPages = PageUtil.getTotalPages(view.getTotalRecords(),
- view.getRecordsPerPage());
- view.setTotalPages(String.valueOf(totalPages));
- return "list";
- }
在js中声明方法时,要注意,左边是错误的
