高效简单的JSP分页代码分析

<%@ page import="java.sql.*,java.io.*,java.util.*" %

<%@ page language="java" pageEncoding="Big5" %

<%! String au_id,au_lname,au_fname,phone,address,city,state;%

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"

<HTML

<HEAD

<TITLEArticleList</TITLE

</head

<body bgcolor="#FFFFFF"

<table width="760" border="0" cellspacing="0" cellpadding="0" align="center"

<tr

<td

<table width="750" border="0" cellspacing="2" cellpadding="2" align="center"

<tr align="center"

<td</td

</tr

<tr

<td

<table width="740" border="0" cellspacing="1" cellpadding="1" align="center"

<tr align="center" bgcolor="#CCCCCC"

<td<b标题</b</td

<td<b作者</b</td

<td<b类型</b</td

<td<b点击</b</td

<td<b加入时间</b</td

</tr

int i;

int ipage=5; //分页单位

int allpage; //总页数

int pages; //接受的页码变量

int cpage=1; //当前页

int spage; //开始页

int allCol=0;

Vector v=null;

//数据库连接声明

Connection conn=null;

java.lang.String sql,pagesql;

java.sql.ResultSet rs,pagers;

Statement statement=null;

String kmsdb="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=DBName";

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");

conn = DriverManager.getConnection(kmsdb, "user", "pwd");

pagesql = "SELECT COUNT(*) FROM

Authors";

//取总文章数

statement = conn.createStatement();

pagers = statement.executeQuery(pagesql);

while(pagers.next())

{

allCol = pagers.getInt(1);

System.out.println(allCol);

}

//获得总页面数

allpage = (int)Math.ceil((allCol + ipage-1) / ipage);

//判断参数pages是否空

if (request.getParameter("pages")==null) {

pages=1;

} else {

pages = new Integer(request.getParameter("pages")).intValue();

System.out.println(pages);

}

//判断当前页

if(pages allpage || pages == 0)

{cpage = 1;}

else

{

cpage = pages;

}

//判断起始页

sql = "select Top "+ipage+" au_id,au_lname,au_fname,address,phone from authors where au_id not in (select top "+(cpage-1)*ipage+" au_id from authors order by au_id desc)order by au_id desc";

rs = statement.executeQuery(sql);

while (rs.next())

{

au_id=rs.getString("au_id");

au_lname=rs.getString("au_lname");

au_fname=rs.getString("au_fname");

phone=rs.getString("phone");

address=rs.getString("address");

<td width="300"<%= au_id %</a</td

<td width="300"<%= au_lname %</a</td

<td width="300"<%= au_fname %</a</td

<td width="300"<%= phone %</a</td

<td width="300"<%= address %</a</td

</tr

<tr bgcolor="#CCCCCC"

<td colspan="5" align="right" valign="middle"共 <%= allCol %条记录共 <%= allpage %页 <% if (cpage1) { %<a href="fy.jsp?pages=<%= cpage-1 %"<img src="images/prev.gif" border="0"</a<% } if (cpage<allpage) { %<a href="fy.jsp?pages=<%= cpage+1 %"<img src="images/next.gif" border="0"</a<% } % / <% for (i=1;i<=allpage;i++) { if (i != pages) {%<a href="fy.jsp?pages=<%= i %"<%= i %</a<% }} %</td

</tr

</table

</td

</tr

</table

</td

</tr

</table

</body

</html