//index.JSP 改进了的实现分类查询的默认页面
<%@ page contentType="text/html;charset=big5"%>
<%@ include file="articleconn1.jsp"%>
<%
String types=request.getParameter("types");
if(types==null)
types="null";
String query=null;
String sqlname=null;
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=big5">
<title>信息查詢系統</title>
<script>
function openwin(id){ window.open("view.jsp?id=" id,"","height=450,width=550,resizable=yes,scrollbars=yes,status=no,toolbar=no,menubar=no,location=no");}
</script>
<link rel="stylesheet" href="css/style.css">
</head>
<body bgcolor="#FFFFFF" topmargin="0" leftmargin="0" marginwidth="0" marginheight="0">
<table width="609" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td>
<div align="center"><img src="images/TITLE.jpg" width="587" height="174"></div>
</td>
</tr>
</table>
<center>
分類查看信息:
<a href="index.jsp?types=MP3">>>mp3</a>
<a href="index.jsp?types=notebook">>>notebook</a>
<a href="index.jsp?types=pc">>>computer</a>
<a href="index.jsp?types=mobile phone">>>mobile phone</a> </center>
<div align="center"></div>
<table width="607" cellpadding="0" cellspacing="0" align="center">
<tr>
<td colspan="3" height="117">
<table border="1" width="100%" bordercolorlight="#000000" bordercolordark="#FFFFFF" cellpadding="0" cellspacing="0" align="center">
<tr>
<td height="16" bgcolor="#B5D85E" width="81%">
<div align="center">
<p><font color="#000000"><strong>信 息 列 表</strong></font>
</p>
</div>
</td>
</tr>
<tr>
<td width="81%" align="center" valign="top" height="139">
<div align="center">
<div align="center">
<div align="center"><br>
<br>
<div align="center">
<p align="left">
<%
int intPageSize;
int intRowCount;//記錄總數
int intPageCount;//總頁數
int intPage;//頁面參數
String strPage;//定義變數用來傳遞page
int i,j;
intPageSize=5;//定義每頁顯示5條記錄
strPage=request.getParameter("page");//取得當前的頁碼
if(strPage==null){//判斷初始頁面,如果沒有顯示記錄,就置為第一頁
intPage=1;
}else{
intPage=Integer.parseInt(strPage);//將strPage轉化為整數
if(intPage<1) intPage=1;
}
if(types.equals("null"))
{sqlname=" select count(article_id) from learning ";}
else
{sqlname=" select count(article_id) from learning where types='" types "' "; }
//sqlname="select count(article_id) from learning where title like '%" keyword "%' and types like '%" typename "%' order by article_id desc";
PreparedStatement ps=conn.prepareStatement(sqlname);
ResultSet rs1=ps.executeQuery();
rs1.next();
intRowCount=rs1.getInt(1);//取得整數保存與intRowCount變數中
intPageCount=(intRowCount intPageSize-1)/intPageSize;//計算出總頁數(記錄總數 每頁顯示的記錄-1)/每頁顯示的記錄)
if(intPage>intPageCount)
intPage=intPageCount;
if(types.equals("null"))
{query=" select * from learning order by article_id ";}
else
{query=" select * from learning where types='" types "' order by article_id "; }
ps=conn.prepareStatement(query);
//String query=" select * from learning order by article_id ";
ResultSet rs=ps.executeQuery(query);//執行sql，按照時間先後排序顯示
i=(intPage-1)*intPageSize;
for(j=0;j<i;j )
rs.next();
%>
<%-- 設置intPage參數 --%>
<FORM action=index.jsp method=POST>
<p align='center' vAlign='bottom'>
第<%=intPage%>頁 共<%=intPageCount%>頁
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