java分页显示实现

JSP中：

<%
Map<String,Object> map = (Map<String,Object>)request.getAttribute("mapParms");
PageBean pb = (PageBean)request.getAttribute("pblog");
List<Map<String,Object>> logs=pb.getList();
%>
function retunPage(num) {
		var pagenow = document.getElementById("pagenow");
		var myform = document.getElementById("QueryForm");
		if (num == 1) {
			pagenow.value = 1;
		} else if (num == 2) {
			pagenow.value = Number(pagenow.value) - 1;
		} else if (num == 3) {
			pagenow.value = Number(pagenow.value) + 1;
		} else if (num == 4) {
			pagenow.value =<%=pb.getPageall()%>;
		}
		myform.submit();
	}
	function skippage() {
		var select = document.getElementById("select");
		var pagenow = document.getElementById("pagenow");
		pagenow.value = select.value;
		document.getElementById("QueryForm").submit();
	}

 

在form表单之间：

<input type="hidden" name="pagenow" id="pagenow"value="<%=pb.getPagenow()%>" />
<tr>
							
<td  colspan="5" align="left" style="font-size:12px;font-family:'微软雅黑'">总<%=pb.getRows()%>条     当前<%=pb.getPagenow()%>/<%=pb.getPageall()%><td>
	<td align="right">
		<%if (pb.getPagenow() <= 1) {%> 
		<input type="button" value="首页" disabled onclick="retunPage(1)" /> 
		<input type="button" value="上一页"disabled onclick="retunPage(2)" /> <%
 		} else {%> 
		<input type="button" value="首页" onclick="retunPage(1)" /> 
 		<input type="button" value="上一页" onclick="retunPage(2)" /> <%
 		}
 		if (pb.getPagenow() >= pb.getPageall()) {%> 
		<input type="button" value="下一页" disabled onclick="retunPage(3)" />
		<input type="button" value="尾页" disabled onclick="retunPage(4)" /> <%
		} else {%> 
		<input type="button" value="下一页" onclick="retunPage(3)" />
		<input type="button" value="尾页" onclick="retunPage(4)" /> <%}
		 %> 跳转到第<select onchange="skippage()" id="select">
		<%
		for (int i = 1; i <= pb.getPageall(); i++) {
		if (i == pb.getPagenow()) {
		%>
		<option value="<%=i%>" selected><%=i%></option>
		<%} else {
		%>
		<option value="<%=i%>"><%=i%></option>
		<%
		}
		}
		%>
		</select>
								
		</td>
</tr>

 

后台代码：

String pagenow1=request.getParameter("pagenow");
		int pagenow=0;
		if(pagenow1==null){
			pagenow=1;
		}else{
			pagenow=Integer.parseInt(pagenow1);
		}
		StringBuffer sb = new StringBuffer();
  		sb.append("SELECT top 20 * from (select *,Row_Number() OVER (Order by JDate DESC ) AS RowNumber from (select * from Log where JCompanyID='"+jCompanyID+"'");
  		System.out.println(sb);
  		StringBuffer sbCount = new StringBuffer();
  		sbCount.append("select count(*) from Log where JCompanyID='"+jCompanyID+"'");
  		PageBean pb = null;
  		try {
			pb=pageService.getPage(sbCount.toString(),sb, pagenow,20);
		} catch (NumberFormatException e) {
			e.printStackTrace();
		}
  		request.setAttribute("pblog",pb);
		public PageBean getPage(String sqlCount, StringBuffer sb, int pagenow,
				int pagesize) throws NumberFormatException {
			PageBean pb = new PageBean();
			pb.setPagenow(pagenow);
			pb.setPagesize(pagesize);
			pb.setRowstart((pagenow - 1) * pagesize);
			pb.setRowend(pb.getRowstart() + pagesize);
			System.out.println(sqlCount);
			Connection conn = null;
			PreparedStatement ps = null;
			ResultSet rs = null;
			try {
				conn = SQLHelper.getConnection();
				ps = conn.prepareStatement(sqlCount);
				rs = ps.executeQuery();
				rs.next();
				pb.setRows(Integer.parseInt(rs.getString(1)));
			} catch (SQLException e) {
				e.printStackTrace();
			} finally {
				SQLHelper.closeConnection(conn, ps, rs);
			}

			pb.setPageall(pb.getRows() % pagesize == 0 ? pb.getRows() / pagesize
					: pb.getRows() / pagesize + 1);
			sb.append(" ) as Work) as T where  T.RowNumber >" + pb.getRowstart());
			// 添加按报警时间逆序排列
			sb.append(" order by JDate DESC ");
			System.out.println(sb.toString());
			pb.setList(queryToList(sb.toString()));
			return pb;
		}

 根据自己项目去修改sql语句就可以了。