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jsp 分页（数据库读取数据）

2013-08-19 19:24 281 查看 
<%@ page contentType="text/html; charset=gb2312"%>
<%@ page language="java"%>
<%@ page import="java.sql.*"%>
<%
//驱动程序名，比较旧了，如果你用mysql5,自己改。
String driverName = "org.gjt.mm.mysql.Driver";
String userName = "root";//数据库用户名
String userPasswd = "666666";//密码

String dbName = "search";//数据库名
String tableName = "organizations"; //表名
//连接字符串
String url = "jdbc:mysql://localhost/" + dbName + "?user="+ userName + "&password=" + userPasswd;
Class.forName(driverName).newInstance();
Connection connection = DriverManager.getConnection(url);
Statement statement = connection.createStatement();

//每页显示记录数
int PageSize = 30;
int StartRow = 0; //开始显示记录的编号
int PageNo = 0;//需要显示的页数
int CounterStart = 0;//每页页码的初始值
int CounterEnd = 0;//显示页码的最大值
int RecordCount = 0;//总记录数;
int MaxPage = 0;//总页数
int PrevStart = 0;//前一页
int NextPage = 0;//下一页
int LastRec = 0;
int LastStartRecord = 0;//最后一页开始显示记录的编号

//获取需要显示的页数，由用户提交
if (request.getParameter("PageNo") == null) { //如果为空，则表示第1页
if (StartRow == 0) {
PageNo = StartRow + 1; //设定为1
}
} else {
PageNo = Integer.parseInt(request.getParameter("PageNo")); //获得用户提交的页数
StartRow = (PageNo - 1) * PageSize; //获得开始显示的记录编号
}

//因为显示页码的数量是动态变化的，假如总共有一百页，则不可能同时显示100个链接。而是根据当前的页数显示
//一定数量的页面链接

//设置显示页码的初始值!!
if (PageNo % PageSize == 0) {
CounterStart = PageNo - (PageSize - 1);
} else {
CounterStart = PageNo - (PageNo % PageSize) + 1;
}
CounterEnd = CounterStart + (PageSize - 1);
%>

<html>
<head>
<title>分页显示记录</title>
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<%
//获取总记录数
ResultSet rs = statement.executeQuery("select count(*) from " + tableName);
rs.next();
RecordCount = rs.getInt(1);

rs = statement.executeQuery("SELECT serial,name,domain FROM " + tableName + " ORDER BY serial LIMIT " + StartRow + ", " + PageSize);

//获取总页数
MaxPage = RecordCount % PageSize;
if (RecordCount % PageSize == 0) {
MaxPage = RecordCount / PageSize;
} else {
MaxPage = RecordCount / PageSize + 1;
}
%>
<body class="UsePageBg">
<table width="100%" border="1" class="InternalHeader">
<tr>
<td width="24%">
<font size=4>分页显示记录</font>
</td>
<td width="76%">
<font size=4><%="总共" + RecordCount + "条记录 - 当前页：" + PageNo + "/"+ MaxPage%></font>
</td>
</tr>
</table>

<br>
<table width="100%" border="1" class="NormalTableTwo">
<tr>
<td class="InternalHeader">
序号
</td>
<td class="InternalHeader">
开办单位
</td>
<td class="InternalHeader">
登录地址
</td>
</tr>

<%
int i = 1;
while (rs.next()) {
int bil = i + (PageNo - 1) * PageSize;
%>
<tr>
<td class="NormalFieldTwo"><%=bil%></td>
<td class="NormalFieldTwo"><%=rs.getString(2)%></td>
<td class="NormalFieldTwo"><%=rs.getString(3)%></td>
</tr>
<%
i++;
}
%>
</table>
>
<br>
<table width="100%" border="0" class="InternalHeader">
<tr>
<td>
<div align="center">
<%
out.print("<font size=4>");
//显示第一页或者前一页的链接
//如果当前页不是第1页，则显示第一页和前一页的链接
if (PageNo != 1) {
PrevStart = PageNo - 1;
out.print("<a href=search.jsp?PageNo=1>第一页 </a>: ");
out.print("<a href=search.jsp?PageNo=" + PrevStart + ">前一页</a>");
}
out.print("[");

//打印需要显示的页码
for (int c = CounterStart; c <= CounterEnd; c++) {
if (c < MaxPage) {
if (c == PageNo) {
if (c % PageSize == 0) {
out.print(c);
} else {
out.print(c + " ,");
}
} else if (c % PageSize == 0) {
out.print("<a href=search.jsp?PageNo=" + c + ">" + c + "</a>");
} else {
out.print("<a href=search.jsp?PageNo=" + c + ">" + c + "</a> ,");
}
} else {
if (PageNo == MaxPage) {
out.print(c);
break;
} else {
out.print("<a href=search.jsp?PageNo=" + c + ">" + c + "</a>");
break;
}
}
}

out.print("]");
;

if (PageNo < MaxPage) { //如果当前页不是最后一页，则显示下一页链接
NextPage = PageNo + 1;
out.print("<a href=search.jsp?PageNo=" + NextPage + ">下一页</a>");
}

//同时如果当前页不是最后一页，要显示最后一页的链接
if (PageNo < MaxPage) {
LastRec = RecordCount % PageSize;
if (LastRec == 0) {
LastStartRecord = RecordCount - PageSize;
} else {
LastStartRecord = RecordCount - LastRec;
}

out.print(":");
out.print("<a href=search.jsp?PageNo=" + MaxPage + ">最后一页</a>");
}
out.print("</font>");
%>
</div>
</td>
</tr>
</table>
<%
rs.close();
statement.close();
connection.close();
%>
</body>
</html>
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