📄 showbypage.jsp
字号:
<%@page contentType="text/html;charset=gb2312" %>
<%@page import="java.sql.*" %>
<html>
<body bgcolor="pink">
<font size="1">
<%!
int pageSize=3;
int pageCount=0;
%>
<form action="" method="get">
输入页码数：
<input type="text" name="showPage" size="4">
<br><input type="submit" name="b" value="提交">
</form>
<%
Connection con;
Statement sql;
ResultSet rs;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcdriver");
}catch(ClassNotFoundException e){
}
try{
con=DriverManager.getConnection("jdbc:odbc:pubs","","");
sql=con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs=sql.executeQuery("select * from students");
rs.last();
int lastRow=rs.getRow();
pageCount=(lastRow%pageSize==0)?(lastRow/pageSize):(lastRow/pageSize+1);
int showPage=1;
out.print("<p>共有"+pageCount+"页");
out.print("<br>每页显示"+pageSize+"条记录。");
String integer=request.getParameter("showPage");
if(integer==null)
integer="1";
try{
showPage=Integer.parseInt(integer);
}catch(NumberFormatException e){
showPage=1;
}
if(showPage<=1)
showPage=1;
if(showPage>=pageCount)
showPage=pageCount;
out.print("<br>目前显示第"+showPage+"页");
int posion=(showPage-1)*pageSize+1;
rs.absolute(posion);
out.print("<Table Border>");
out.print("<tr>");
out.print("<TH width=100>"+"学号");
out.print("<TH width=100>"+"姓名");
out.print("<TH width=50>"+"数学成绩");
out.print("<TH width=50>"+"英语成绩");
out.print("<TH width=50>"+"物理成绩");
out.print("</tr>");
for(int i=1;i<=pageSize;i++){
out.print("<tr>");
out.print("<TD>"+rs.getString(1)+"</TD>");
out.print("<TD>"+rs.getString(2)+"</TD>");
out.print("<TD>"+rs.getInt("数学成绩")+"</TD>");
out.print("<TD>"+rs.getInt("英语成绩")+"</TD>");
out.print("<TD>"+rs.getInt("物理成绩")+"</TD>");
out.print("</tr>");
rs.next();
}
out.print("</Table>");
con.close();
}catch(SQLException ee){
}
%>
</form>
</font>
</body>
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