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06-php雇员管理系统-实现显示雇员信息列表分页改进（可以处理大数据100000条）

2013-08-13 01:31 901 查看

empList.php

<html>
<head>
<meta content="text/html;charset=utf-8" http-equiv="content-type">
<title>雇员信息列表</title>
</head>

<?php
$conn = mysql_connect ( "localhost", "root", "root" ) or die ( mysql_error () );
mysql_query ( "set names utf8" );

//选择数据库
mysql_select_db ( "test", $conn );

$pageSize = 20; //每页数
$rowCount = 0; //记录数
$pageNow = 1; //当前页
$pageCount = 0; //页数

//根据用户的点击收取pagenow的值
if (! empty ( $_GET ['pageNow'] )) {
$pageNow = $_GET ['pageNow'];
}

//查找数据库中总的记录有多少条
$sql = "select count(id) from emp";
$res1 = mysql_query ( $sql );
//取出记录数
if ($row = mysql_fetch_row ( $res1 )) {
$rowCount = $row [0];
}
//计算共有多少页
$pageCount = ceil ( $rowCount / $pageSize );

//分页查找数据库中的记录
$sql = "select * from emp limit " . ($pageNow - 1) * $pageSize . ",$pageSize";
$res2 = mysql_query ( $sql, $conn );

//表格显示分页查询后的结果
echo "<table width='700px' border='1px' bordercolor='green' cellspacing='0px'>";
echo "<tr><th>id</th><th>name</th><th>grade</th>";
echo "<th>email</th><th>salary</th><th>删除</th><th>修改</th></tr>";

//这里我们需要循环显示用户的信息
while ( $row = mysql_fetch_assoc ( $res2 ) ) {
echo "<tr><td>{$row['id']}</td><td>{$row['name']}</td><td>{$row['grade']}</td>";
echo "<td>{$row['email']}</td><td>{$row['salary']}</td>";
echo "<td><a href='#'>删除用户</a></td>";
echo "<td><a href='#'>修改用户</a></td><tr>";
}
echo "<h1>雇员信息列表</h1>";
echo "<hr/>";
echo "</table>";

//打印页码的超链接
//for($i = 1; $i <= $pageCount; $i ++) {
// echo "<a href='empList.php?pageNow=$i'>$i</a> ";
//}
//显示上一页和下一页
if ($pageNow > 1) {
$prePage = $pageNow - 1;
echo "<a href='empList.php?pageNow=$prePage'>上一页</a> ";
}
if ($pageNow < $pageCount) {
$nextPage = $pageNow + 1;
echo "<a href='empList.php?pageNow=$nextPage'>下一页</a> ";
}
//显示当前页和共有多少页
echo "当前页{$pageNow}/共{$pageCount}页";

//指定跳转到某页
echo "<br/><br/>";
?>
<form action="empList.php" method="get" onsubmit="checkNum();">跳转到:<input
type="text" name="pageNow" style="width:40px;"/>页 <input type="submit" value="Go" />
</form>
<?php
//关闭资源
mysql_free_result ( $res2 );
mysql_close ( $conn );

?>
</html>empManage.php
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<?php
echo "欢迎你," . $_GET ['name'] . "登录成功！...";
echo "<br/><a href='login.php'>返回重新登录</a>";
?>
<h1>主界面</h1>
<a href="empList.php">管理用户</a>
<br />
<a href="#">添加用户</a>
<br />
<a href="#">查询用户</a>
<br />
<a href="#">退出系统</a>
<br />
</html>

login.php
<html>

<head>
<meta content="text/html;charset=utf-8" http-equiv="content-type">
</head>
<h1>管理员登录系统</h1>
<form action="loginProcess.php" method="post">
<table>
<tr>
<td>用户id</td>
<td><input type="text" name="id" /></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password" /></td>
</tr>
<tr>
<td><input type="submit" value="用户登录" /></td>
<td><input type="reset" value="重新填写" /></td>
</tr>
</table>
</form>
<?php
if (! empty ( $_GET ['errno'] )) {
$errno = $_GET ['errno'];
if ($errno == 1) {
echo "<font color='red' size='3'>你的用户名或密码错误</font>";
}
}

?>
</html>

loginProcess.php
<?php

//接受用户的数据
//1.id
$id = $_POST ['id'];
//2.密码
$password = $_POST ['password'];

//得到连接
$conn = mysql_connect ( "localhost", "root", "root" );
if (! $conn) {
die ( "连接失败" . mysql_errno () );
}
//设置访问数据库的编码
mysql_query ( "set names utf8", $conn ) or die ( mysql_errno () );
//选择数据库
mysql_select_db ( "test", $conn ) or die ( mysql_errno () );
//发送sql语句验证
$sql = "select password,name from admin where id=$id";
//通过id获取password
$res = mysql_query ( $sql, $conn );
if ($row = mysql_fetch_assoc ( $res )) {
//取出数据库的密码
if ($row ['password'] == md5 ( $password )) {
//合法
//取出用户名字
$name=$row['name'];
header ( "Location:empManage.php?name=$name" );
exit ();
}
}
header ( "Location:login.php?errno=1" );
exit ();

//关闭资源
mysql_free_result($res);
mysql_close($conn);

?>

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