JSP实例三、sql分页(1)
index.jsp
| <%@ page language="java" import="java.sql.*" import="java.lang.*" import="java.util.*" pageEncoding="GB2312"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <%! int CountPage = 0; int CurrPage = 1; int PageSize = 5; int CountRow = 0; public Connection Con() { try { Class.forName("com.mysql.jdbc.Driver").newInstance(); Connection Con = DriverManager.getConnection("jdbc:mysql://localhost:3306/userdb?user=root&password=zhz&useUnicode=true&characterEncoding=gb2312"); return Con; } catch(Exception e) { return null; } } %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>">
<title>利用 SQL 语句实现分页</title>
<meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> -->
<style type="text/css"> <!-- .style1 { color: #6633CC; font-weight: bold; font-size: 16px; } .style3 {font-size: 12} --> </style> </head> <body> <div align="center" class="style1"> <h1> 利用 SQL 语句实现分页 </h1> <table width="200" border="0" cellpadding="0" cellspacing="0" bordercolor="#FFFFFF" bordercolordark="#999999" bordercolorlight="#FFFFFF"> <tr> <td colspan="2"> <table width="511" border="1" cellpadding="0" cellspacing="0" bordercolor="#FFFFFF" bordercolordark="#999999" bordercolorlight="#FFFFFF"> <tr> <td nowrap><span class="style3">编号</span></td> <td nowrap><span class="style3">姓名</span></td> <td nowrap><span class="style3">学号</span></td> </tr> <!--获取表记录--> <% String StrPage = request.getParameter("Page"); if (StrPage == null) { CurrPage = 1; } else { CurrPage = Integer.parseInt(StrPage); } Connection Con = Con(); Statement Smt; ResultSet Rs; if (Con != null) { try { String SQL = "Select * From user"; Smt = Con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); Rs = Smt.executeQuery(SQL); Rs.last(); int i = 0; CountRow = Rs.getRow(); CountPage = (CountRow/PageSize); if (CountRow%PageSize>0) CountPage++; int posion = (CurrPage-1)*5+1; SQL = "select * from user limit "+(posion-1)+",5"; Smt = Con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); Rs = Smt.executeQuery(SQL);
while (Rs.next()) { %><tr> <td nowrap><span class="style3"><%=Rs.getString("id")%></span></td> <td nowrap><span class="style3"><%=Rs.getString("userName")%></span></td> <td nowrap><span class="style3"><%=Rs.getString("userPwd")%></span></td> </tr><% } } catch (SQLException e) { out.println(e.getMessage()); } finally { Con.close(); } } %> </table></td> </tr> <tr>
<td width="251">[<%=CurrPage%>/<%=CountPage %>] 每页5条 共<%=CountRow%>条记录<%=(CurrPage-1)*5+1%></td> <td width="260"><div align="right"> <%if (CurrPage>1){%> <a href="index.jsp?Page=<%=CurrPage-1%>">上一页</a> <%
} %> <%if (CurrPage<CountPage){%> <a href="index.jsp?Page=<%=CurrPage+1%>">下一页</a> <%
} %> <a href="index.jsp?Page=<%=CountPage%>">最后一页</a> </div></td> </tr> </table>
<h1 align="center"><br> </h1> </div> </body> </html>
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