jsp分页技术

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page language="java" import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<%
request.setCharacterEncoding("UTF-8");
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'Loginpage.jsp' starting page</title>

}

   try {
    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
   } catch (ClassNotFoundException e) {
    e.printStackTrace();
    System.out.print("驱动包连接失败！");
   }

   String url = "jdbc:sqlserver://localhost:1433;DatabaseName=StuInfor";
   ;
   String user = "sa";
   String password = "sa";
   Connection con = null;
   PreparedStatement psta = null;
   String sql = "select count(*) from Student2";
   ResultSet rs = null;

   //2.连接数据库
   try {
    con = DriverManager.getConnection(url, user, password);
   } catch (SQLException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    System.out.println("数据库连接失败！");
   }

   //3.创建 PreparedStatement对象
   try {
    psta = con.prepareStatement(sql);
    rs = psta.executeQuery();
   } catch (SQLException e) {

    e.printStackTrace();
   }
   if (rs.next()) {
    rowcount = rs.getInt(1); //取到数据库中的1行一列就是所有记录
   }
   if (rowcount % pagesize == 0) { //计算pagecount
    pagecount = rowcount / pagesize;
   } else {
    pagecount = rowcount / pagesize + 1;
   }
   String sql1 = "select top " + pagesize
     + " *from Student2 where id not in(select top " + pagesize
     * (pagenow - 1) + " id from Student2 )";
     psta = con.prepareStatement(sql1);
     rs=psta.executeQuery();
   //显示
  %>

   <table border="1">
   <tr>
    <td>学号</td> <td>姓名</td> <td>性别</td> <td>年龄</td><td>班级</td>
   </tr>
   <%
   while(rs.next()){
    %>
    <tr> <td><%=rs.getInt(2)%></td> <td><%=rs.getString(3)%></td>
     <td><%=rs.getString(4)%></td> <td><%=rs.getString(5)%></td>
     <td><%=rs.getString(6)%></td>
    <%
     }
     %>

  </table>
<%

    //显示上一页
   if(pagenow!=1){
out.println("<a href=Loginpage.jsp?pagenow="+(pagenow-1)+">上一页</a>");
}

//显示超链接
for(int i=1;i<=pagecount;i++){
   out.println("<a href=Loginpage.jsp?pagenow="+i+">["+i+"]</a>");

}

//显示下一页
   if(pagecount!=pagenow){
   out.println("<a href=Loginpage.jsp?pagenow="+(pagenow+1)+">下一页</a>");
}
  out.println("<a href=Mypage.jsp?> 你当前在第"+pagenow+"页</a>");
  %>
</body>

</html>