struts s 标签通用分页

 我的习惯是直接贴代码，语言表达能力不好，懒得写。但是我贴代码会贴全，这样就不会让其他人跟我一样，有时候找不到使用的方法，还有去百度或者调整半天。真心觉得给部分代码如果有问题，很烦人，有时候很难找到问题。

这里struts 中action的调用就不详细讲解了，不懂先去了解，再回来看。

 

注意：火狐浏览器点击分页按钮请求一次，会调用两次action，其他浏览器不会，找了很久，没有解决方法，如果有人知道，欢迎指点。

后台action类：

import java.util.List;
import java.util.Map;

@SuppressWarnings("serial")
public class UserListAction extends ActionSupport {

	private UserService adminUserService;
	private List<TbUser> userList = null;
	private Page page = new Page();

	@SuppressWarnings("unchecked")
	@Override
	public String execute() throws Exception {
		log.info("查找用户列表");

		// 每页显示条数
		page.setEveryPage(3);
		// 获取数据
		Map<String, Object> map = adminUserService.findUserByPage(page);
		userList = map.get("list") == null ? null : (List<TbUser>) map.get("list");
		page = map.get("page") == null ? null : (Page) map.get("page");

		return "success";
	}

	public UserService getAdminUserService() {
		return adminUserService;
	}

	public void setAdminUserService(UserService adminUserService) {
		this.adminUserService = adminUserService;
	}

	public List<TbUser> getUserList() {
		return userList;
	}

	public void setUserList(List<TbUser> userList) {
		this.userList = userList;
	}

	public Page getPage() {
		return page;
	}

	public void setPage(Page page) {
		this.page = page;
	}

}

 

page类

public class Page {

	/** 是否有上一页 */
	private boolean hasPrePage;

	/** 是否有下一页 */
	private boolean hasNextPage;

	/** 每页的数量 */
	private int everyPage;

	/** 总页数 */
	private int totalPage;

	/** 当前页 */
	private int currentPage;

	/** 起始点 */
	private int beginIndex;

	/** 总记录数 */
	private int totalCount;

	/** 开始的页数 */
	private int startPage;

	/** 结束的页数 */
	private int endPage;

	/**
	 * @return totalCount
	 */
	public int getTotalCount() {
		return totalCount;
	}

	/**
	 * @param totalCount
	 */
	public void setTotalCount(int totalCount) {
		this.totalCount = totalCount;
	}

	public Page() {

	}

	public Page(int everyPage) {
		this.everyPage = everyPage;
	}

	public Page(boolean hasPrePage, boolean hasNextPage, int everyPage, int totalPage, int currentPage, int beginIndex, int totalCount, int startPage, int endPage) {
		this.hasPrePage = hasPrePage;
		this.hasNextPage = hasNextPage;
		this.everyPage = everyPage;
		this.totalPage = totalPage;
		this.currentPage = currentPage;
		this.beginIndex = beginIndex;
		this.totalCount = totalCount;
		this.startPage = startPage;
		this.endPage = endPage;
	}

	public int getBeginIndex() {
		return beginIndex;
	}

	public void setBeginIndex(int beginIndex) {
		this.beginIndex = beginIndex;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}

	public int getEveryPage() {
		return everyPage;
	}

	public void setEveryPage(int everyPage) {
		this.everyPage = everyPage;
	}

	public boolean getHasNextPage() {
		return hasNextPage;
	}

	public void setHasNextPage(boolean hasNextPage) {
		this.hasNextPage = hasNextPage;
	}

	public boolean getHasPrePage() {
		return hasPrePage;
	}

	public void setHasPrePage(boolean hasPrePage) {
		this.hasPrePage = hasPrePage;
	}

	public int getTotalPage() {
		return totalPage;
	}

	public void setTotalPage(int totalPage) {
		this.totalPage = totalPage;
	}

	public int getStartPage() {
		return startPage;
	}

	public void setStartPage(int startPage) {
		this.startPage = startPage;
	}

	public int getEndPage() {
		return endPage;
	}

	public void setEndPage(int endPage) {
		this.endPage = endPage;
	}

}

 

page工具类

public class PageUtil {

	// 静态方法
	public static Page createPage(Page page, int totalRecords) {
		return createPage(page.getEveryPage(), page.getCurrentPage(), totalRecords);
	}

	// 创建Page对象
	public static Page createPage(int everyPage, int currentPage, int totalRecords) {
		everyPage = getEveryPage(everyPage);
		currentPage = getCurrentPage(currentPage);
		int beginIndex = getBeginIndex(everyPage, currentPage);
		int totalPage = getTotalPage(everyPage, totalRecords);
		boolean hasNextPage = hasNextPage(currentPage, totalPage);
		boolean hasPrePage = hasPrePage(currentPage);
		int pageScope[] = getShowScope(currentPage, 10, totalPage);

		return new Page(hasPrePage, hasNextPage, everyPage, totalPage, currentPage, beginIndex, totalRecords, pageScope[0], pageScope[1]);
	}

	// 返回每页显示数目
	private static int getEveryPage(int everyPage) {
		return everyPage == 0 ? 10 : everyPage;
	}

	// 返回当前页
	private static int getCurrentPage(int currentPage) {
		return currentPage == 0 ? 1 : currentPage;
	}

	// 返回开始的索引
	private static int getBeginIndex(int everyPage, int currentPage) {
		return (currentPage - 1) * everyPage;
	}

	// 返回总页数
	private static int getTotalPage(int everyPage, int totalRecords) {
		int totalPage = 0;

		if (totalRecords % everyPage == 0)
			totalPage = totalRecords / everyPage;
		else
			totalPage = totalRecords / everyPage + 1;

		return totalPage;
	}

	// 返回是否有上一页。false：没有；true：有
	private static boolean hasPrePage(int currentPage) {
		return currentPage == 1 ? false : true;
	}

	// 返回是否有下一页。false：没有；true：有
	private static boolean hasNextPage(int currentPage, int totalPage) {
		return currentPage == totalPage || totalPage == 0 ? false : true;
	}

	private static int[] getShowScope(int currentPage, int showNum, int totalPage) {

		// 初始化开始页
		int startPage = currentPage <= 6 ? 1 : currentPage - 5;

		// 初始化结束页
		int endPage = showNum + startPage - 1;

		if (endPage > totalPage) {
			endPage = totalPage;
		}

		startPage = endPage - showNum + 1;

		if (startPage <= 0) {
			startPage = 1;
		}

		return new int[] { startPage, endPage };
	}

}

 

显示数据的Jsp页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户列表</title>
</head>
<body>
	<ul>
		<s:iterator id="user" value="userList" status="statu">
			<li>
				<s:property value="#statu.count" /> 
				<s:property	value="#user.userId" /> 
				<s:property value="#user.userName" />
			</li>
		</s:iterator>
	</ul>
	<div>
		<!--页码-->
		<!-- 分页组件 -->
		<%@ include file="page.jsp"%>
		<!--页码 End-->
	</div>
</body>
</html>

 

通用page页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"	pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!-- 分页组件 -->
<s:if test="page.hasPrePage || page.hasNextPage">
	<div class="turnpage">
		<!-- 首页 -->
		<s:url id="goto" includeParams="none"> 
			<s:param name="page.currentPage" value="1" />
		</s:url>
		<s:a href="%{goto}" title="首页">
			<span>首页</span>
		</s:a>
		<!-- end首页 -->
		
		<!-- 上一页 -->
		<s:if test="page.hasPrePage">
			<s:url id="goto">
				<s:param name="page.currentPage" value="%{page.currentPage - 1}" />
			</s:url>
			<s:a href="%{goto}" title="上一页" id="prePage" >
				<span>上一页</span>
			</s:a>
		</s:if>
		<s:else>
			<span>上一页</span>
		</s:else>
		<!-- end上一页 -->

		<%-- 页面显示 --%>
		<s:if test="page.totalPage <= 10">
			<s:bean name="org.apache.struts2.util.Counter" id="counter">
				<s:param name="first" value="1" />
				<s:param name="last" value="page.totalPage" />
			</s:bean>
			<s:iterator value="#counter">
				<s:url id="goto">
					<s:param name="page.currentPage" value="top" />
				</s:url>
				<s:if test="top == page.currentPage">
					<a class="cur"><span><s:property /></span></a>
				</s:if>
				<s:else>
					<s:a href="%{goto}">
						<span><s:property /></span>
					</s:a>
				</s:else>
			</s:iterator>
		</s:if>
		<s:else>
			<s:bean name="org.apache.struts2.util.Counter" id="counter">
				<s:param name="first" value="%{page.currentPage - 4 >= 1 ? (page.currentPage > page.totalPage - 5 ? ( page.totalPage - 9 ) :( page.currentPage - 4 )) : 1}" />
				<s:param name="last" value="%{page.currentPage + 5 <= page.totalPage ? (page.currentPage < 5 ?  ( page.currentPage + (10 - page.currentPage) ) : (page.currentPage + 5)) : page.totalPage}" />
			</s:bean>
			 
			<s:iterator value="#counter">
				<s:url id="goto">
					<s:param name="page.currentPage" value="top" />
				</s:url>
				<s:if test="top == page.currentPage">
					<a class="cur"><span><s:property /></span></a>
				</s:if>
				<s:else>
					<s:a href="%{goto}">
						<span><s:property /></span>
					</s:a>
				</s:else>
			</s:iterator>
			<!--如果还有更多，显示... -->
			<s:if test="page.totalPage != #counter.last">
				<span>...</span>
			</s:if>
			<s:url id="goto">
				<s:param name="page.currentPage" value="page.totalPage" />
			</s:url>
			<s:a href="%{goto}" title="page.currentPage">
				<span><s:property value="page.totalPage"/></span>
			</s:a>
		</s:else>

		<!-- 下一页 -->
		<s:if test="page.hasNextPage">
			<s:url id="goto">
				<s:param name="page.currentPage" value="%{page.currentPage + 1}" />
			</s:url>
			<s:a href="%{goto}" title="下一页">
				<span>下一页</span>
			</s:a>
		</s:if>
		<s:else>
			<span>下一页</span>
		</s:else>
		<!-- end下一页 -->

		<%-- 尾页 --%>
		<s:url id="goto">
			<s:param name="page.currentPage" value="page.totalPage" />
		</s:url>
		<s:a href="%{goto}" title="尾页">
			<span>尾页</span>
		</s:a>
		<%-- end尾页 --%>
		
		<!-- 信息 
		&nbsp;&nbsp; 当前页: <s:property value="page.currentPage" /> / <s:property value="page.totalPage" /> 
		&nbsp;&nbsp; 每    页: <s:property value="page.everyPage" /> 条 
		&nbsp;&nbsp; 共    计: <s:property value="page.totalCount" /> 条&nbsp;&nbsp;
		end信息 -->
		
		<%--如果总页数少于100页，显示一个select选择跳转框 --%>
		<s:if test="page.totalPage <= 100">
			<s:bean name="org.apache.struts2.util.Counter" id="counter">
				<s:param name="first" value="1" />
				<s:param name="last" value="page.totalPage" />
			</s:bean>
			<select	onchange="window.location.href = this.options[this.selectedIndex].value;" size="1">
				<s:iterator value="#counter">
					<s:url id="goto">
						<s:param name="page.currentPage" value="top" />
					</s:url>
					<s:if test="top == page.currentPage">
						<option value="<s:property value="%{goto}"/>" selected="selected">
							第	<s:property /> 页
						</option>
					</s:if>
					<s:else>
						<option value="<s:property value="%{goto}"/>">
							第	<s:property /> 页
						</option>
					</s:else>
				</s:iterator>
			</select>
		</s:if>
	</div>
</s:if>