struts2实现最简单的分页技术

struts2实现分页技术：

在对MemberUser类（表）中的数据进行分页：

 1.在MemberUserDaoImpl 中添加 获取数据库中表的总数量的方法：

public int counterByPage() {
		// TODO Auto-generated method stub
		sql="select count(*) from memberuser";
		
		ResultSet rs =util.Query(sql);
		int totalCount=0;
		
		try {
			while(rs.next())
			{
				totalCount = rs.getInt(1);
			}
			
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return totalCount;
	}

2.在MemberUserDaoImpl中添加 获取当前页的数据集合的方法：

public List<MemberUserRole> queryMemberUserInfoByPage(int pageNow,int limitPage) {
		// TODO Auto-generated method stub
		
		sql="SELECT * FROM (SELECT A.*, ROWNUM RN FROM (select M.MEMBERID,M.MEMBERNAME,M.AGE,M.GENDER,M.BIRTHDAY,M.MEMBER_LABEL,M.MEMBER_INTRODUCTION,M.MEMBER_PICTURE,M.MEMBER_INTEGRAL,M.REGISTER_DATE,P.ROLENAME,M.ACCOUNTNUMBER,M.PWD,M.MEMBEREMAIL from memberuser m,person_role p where m.roleid=p.roleid order by m.memberid Asc) A WHERE ROWNUM <=?)WHERE RN >?";
		
		List<MemberUserRole> memberList = new ArrayList<MemberUserRole>();
		
		ResultSet rs = util.Query(sql,limitPage*pageNow,(pageNow-1)*limitPage);
		
		try {
			while(rs.next())
			{
				MemberUserRole mUserRole = new MemberUserRole(rs.getInt("MEMBERID"),rs.getString("memberName"),rs.getInt("age"),rs.getString("gender"),rs.getDate("birthday"),rs.getString("MEMBER_LABEL"),rs.getString("MEMBER_INTRODUCTION"),rs.getString("MEMBER_PICTURE"),rs.getDate("REGISTER_DATE"),rs.getString("roleName"),rs.getString("pwd"),rs.getInt("MEMBER_INTEGRAL"),rs.getString("ACCOUNTNUMBER"),rs.getString("MEMBEREMAIL"));
				
				memberList.add(mUserRole);
				
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally
		{
			util.close();
		}
		
		return memberList;
	}

在Acction中：

public class PageAction extends BaseAction {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	/**
	 * 总记录数
	 */
	private int totalRecord;
	/**
	 * 每页显示条数
	 */
	private int limitPage=5;
	
	/**
	 * 当前页
	 */
	private int nowPage=1;
	
	/**
	 * 总页数
	 */
	private int totalPage;
	
	public int getTotalRecord() {
		return totalRecord;
	}

	public void setTotalRecord(int totalRecord) {
		this.totalRecord = totalRecord;
	}

	public int getLimitPage() {
		return limitPage;
	}

	public void setLimitPage(int limitPage) {
		this.limitPage = limitPage;
	}

	public int getNowPage() {
		return nowPage;
	}

	public void setNowPage(int nowPage) {
		this.nowPage = nowPage;
	}

	public int getTotalPage() {
		return totalPage;
	}

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

	
	MemberUserBiz memberUserBiz = new MemberUserBizImpl();
	/**
	 * @return
	 * 获取某页用户信息的记录
	 */
	public String queryMemberUserInfoByPage()
	{
		List<MemberUserRole> memberListByPage = new ArrayList<MemberUserRole>();
		
		//获取总记录数
		totalRecord= memberUserBiz.counterByPage();
		
		//获取总页数
		totalPage =(totalRecord+limitPage-1)/limitPage;
		
		//当前页处理
		if(nowPage<1)
		{
			nowPage=1;
		}else if(nowPage>=totalPage)
		{
			nowPage=totalPage;
		}
		
		//获得某页的记录
		memberListByPage = memberUserBiz.queryMemberUserInfoByPage(nowPage, limitPage);
		
		app.setAttribute("memberListByPage", memberListByPage);
		
		int a=0;
		req.setAttribute("a", a);
		
		return "queryMemberUserInfoByPage";
	}}

在jsp页面：

<div id="tableInfo" align="center">

			<s:form name="userform" method="post">
				<table border="1" id="userInfoTable">

					<tr id="bt">
						<th>序号</th>
						<th>账号</th>
						<th>用户名</th>
						<th>年龄</th>
						<th>性别</th>
						<th>生日</th>
						<th>积分</th>
						<th>角色</th>
						<th>邮箱</th>

						<s:if test="${mUser.roleId==1}">
							<th>操作</th>
						</s:if>

					</tr>
					<s:iterator value="#application.memberListByPage" status="status"
						id="userInfo">
						<tr id="info" bgcolor="${status.index%2 == 0?'#D0D8E8':'#E9EDF4'}">
							<td>${status.index+1}</td>
							<td><s:property value="#userInfo.accountNumber" /></td>
							<td><s:property value="#userInfo.memberName" /></td>
							<td><s:property value="#userInfo.age" /></td>
							<td><s:property value="#userInfo.gender" /></td>
							<td><s:property value="#userInfo.birthday" /></td>
							<td><s:property value="#userInfo.memberIntegral" /></td>
							<td><s:property value="#userInfo.roleName" /></td>
							<td><s:property value="#userInfo.memberEmail" /></td>


							<s:if test="${mUser.roleId==1}">
								<td><a
									href="member_adminCheckMemberById.action?memberId=${userInfo.memberId}">查看</a>
									| <a
									href="member_deleteMember.action?memberId=${userInfo.memberId}"><span>删除</span>
								</a>| <a
									href="member_adminQueryMemberById.action?memberId=${userInfo.memberId}">更新</a>
								</td>
							</s:if>
						</tr>
					</s:iterator>
				</table>

				<!-- 分页技术的实现-->
				<div>
					<center>
						共<s:property value="totalRecord" />条记录 
						共 ${totalPage} 页
						第<s:property value="nowPage" />页

						<s:a href="page_queryMemberUserInfoByPage.action?nowPage=${1}">首页</s:a>

						<s:if test="nowPage>1">
							<s:a href="page_queryMemberUserInfoByPage.action?nowPage=${nowPage-1}">上一页</s:a>
						</s:if>
						<s:if test="nowPage<totalPage">
							<s:a href="page_queryMemberUserInfoByPage.action?nowPage=${nowPage+1}">下一页</s:a>
						</s:if>
						<s:a href="page_queryMemberUserInfoByPage.action?nowPage=${totalPage}">尾页</s:a>
					</center>
				</div>

			</s:form>
		</div>

以上就是比较完整的代码了

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