帕米尔冰川水价格:jsp类的编译问题

page.java:5: package javax.servlet does not exist
import javax.servlet.*;
^
page.java:6: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
page.java:23: cannot find symbol
symbol : class HttpServletRequest
location: class com.guestbook.page
public page(HttpServletRequest request,ResultSet Rs)
^
3 errors

F:\Tomcat 5.5\webapps\myjsp\WEB-INF\classes\com\guestbook>

提示这样的错误
代码是
package com.guestbook;

import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class page{

int PageSize=5; //一页显示的记录数
int RowCount; //记录总数
int PageCount; //总页数
int Page; //待显示页码
int i=0;
int StartPage;
ResultSet Rs;
String strPage;

/*
构造函数
*/
public page(HttpServletRequest request,ResultSet Rs)
{
this.Rs=Rs;
strPage = request.getParameter("page");
if(strPage==null) Page = 1;
else
{
Page = java.lang.Integer.parseInt(strPage);
if(Page< 1) Page = 1;
}
Rs.last();
RowCount = Rs.getRow();
PageCount = (RowCount+PageSize-1) / PageSize;
if(Page >PageCount)Page = PageCount;
if(PageCount >0)Rs.absolute((Page-1) * PageSize+1);
StartPage = (Page - 1) * PageSize;
}
/*
设置每页显示
*/
public int setPageSize(int PageSize){
this.PageSize=PageSize;
}
/*
设置分页大小的条件函数
*/
public int seti(int i){
this.i=i;
}

}
那里错了高手帮帮忙