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08-php雇员管理系统-分层模式实现通用分页

2013-08-14 22:11 696 查看
Admin.class.php

<?php
//它的一个对象实例就表示admin表中的一条记录
class Admin {
private $id;
private $name;
private $password;
/**
* @return the $id
*/
public function getId() {
return $this->id;
}

/**
* @return the $name
*/
public function getName() {
return $this->name;
}

/**
* @return the $password
*/
public function getPassword() {
return $this->password;
}

/**
* @param $id the $id to set
*/
public function setId($id) {
$this->id = $id;
}

/**
* @param $name the $name to set
*/
public function setName($name) {
$this->name = $name;
}

/**
* @param $password the $password to set
*/
public function setPassword($password) {
$this->password = $password;
}

}
?>AdminService.class.php
<?php
/**
* 该类是一个业务逻辑处理类
* 完成对admin表的操作
*/
require_once 'SqlHelper.class.php';
class AdminService {
//验证用户是否合法的方法
public function checkAdmin($id, $password) {
$sql = "select password,name from admin where id=$id";
//创建一个sqlhelper对象
$sqlHelper=new SqlHelper();
$res=$sqlHelper->execute_dql($sql);
if($row=mysql_fetch_assoc($res)){
//判断密码是否正确
if(md5($password)==$row['password']){
return $row['name'];
}else{
//""为假
return "";
}
}
//资源释放
mysql_free_result($res);
//关闭连接
$sqlHelper->close_connect();
return false;
}

}
?>

Emp.class.php
<?php
class Emp{

}
?>

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
require_once 'EmpService.class.php';
require_once 'FenyePage.php';

//创建一个fenyePage对象实例
$fenyePage = new FenyePage ();
$fenyePage->pageNow = 1;
$fenyePage->pageSize = 6;

//根据用户的点击收取$PageNow的值
if (! empty ( $_GET ['pageNow'] )) {
$fenyePage->pageNow = $_GET ['pageNow'];
}
//创建对象实例
$empService = new EmpService ();
$empService->getFenyePage ( $fenyePage );

echo "<h1>雇员信息列表</h1>";
//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>";
for($i = 0; $i < count ( $fenyePage->res_array ); $i ++) {
$row=$fenyePage->res_array[$i];
echo "<tr><td>{$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 "</table>";

//显示上一页和下一页
echo $fenyePage->navigate;

/*
//使用for循环打印超链接
$page_whole = 5;
$start = floor ( ($fenyePage->pageNow - 1) / $page_whole ) * $page_whole + 1;
$index = $start;

//整体向前翻10页
//如果当前pageNow在1-10,没有向前翻动的超链接
if ($pageNow > $page_whole) {
echo "  <a href='empList.php?pageNow=" . ($start - 1) . "'>  <<  </a>";
}
for(; $start < $index + $page_whole; $start ++) {
echo "<a href='empList.php?pageNow=$start'>[$start]</a>";
}
//整体向后10页翻动
echo "  <a href='empList.php?pageNow=$start'>  >>  </a>";
//显示当前页和共有多少页
echo "当前页{$pageNow}/共{$pageCount}页";

echo "<br/><br/>";*/
?>
<form action="empList.php" method="get">跳转到:<input type="text"
name="pageNow" style="width: 40px;" />页 <input type="submit" value="Go" />
</form>
</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>


EmpService.class.php
<?php
require_once 'SqlHelper.class.php';
class EmpService {
//一个函数，可以用来获取公有多少页
function getPageCount($pageSize) {
//需要查询到$rowCount
$sql = "select count(id) from emp";
$sqlHelper = new SqlHelper ();
$res = $sqlHelper->execute_dql ( $sql );
//这样就可以计算pageCount
if ($row = mysql_fetch_row ( $res )) {
$pageCount = ceil ( $row [0] / $pageSize );
}
//释放资源，关闭连接
mysql_free_result ( $res );
$sqlHelper->close_connect ();
return $pageCount;
}
//一个函数，用来获取应当显示的雇员信息
function getEmpListByPage($pageNow, $pageSize) {
$sql = "select * from emp limit " . ($pageNow - 1) * $pageSize . ",$pageSize";
$sqlHelper = new SqlHelper ();
$res = $sqlHelper->execute_dql2 ( $sql );
//关闭连接
$sqlHelper->close_connect ();
return $res;
}
//第二种使用封装的方式完成分页
function getFenyePage($fenyePage) {
//创建一个SqLHelper对象实例
$sqlHelper = new SqlHelper ();
$sql1 = "select * from emp limit " . ($fenyePage->pageNow - 1) * $fenyePage->pageSize . "," . $fenyePage->pageSize;
$sql2 = "select count(id) from emp";
$sqlHelper->execute_dql_fenye ( $sql1, $sql2, $fenyePage );
$sqlHelper->close_connect();
}
}
?>

FenyePage.php
<?php
//这是一个用于分页信息的类
class FenyePage{
public $pageSize=6;
public $res_array;//这是显示数据
public $rowCount;//这是从数据库中获取
public $pageNow;//用户指定的
public $pageCount;//这个是计算得到的总页数
public $navigate;//分页导航
}

?>

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

//实例化一个AdminService方法
$adminService = new AdminService ();
if ($adminService->checkAdmin ( $id, $password )) {
$name=$adminService->checkAdmin ( $id, $password );
//合法
header ( "Location:empManage.php?name=$name" );
exit ();
} else {
//非法
header ( "Location:login.php?errno=1" );
exit ();
}
?>SqlHelper.class.php
<?php
/**
* 操作数据库的工具类
* 作用是完成对数据库的操作
* @author Administrator
*
*/
class SqlHelper {
public $conn; //数据库连接
public $dbname = "test"; //数据库的名称
public $username = "root"; //
public $password = "root";
public $host = "localhost";
//构造函数
public function __construct() {
$this->conn = mysql_connect ( $this->host, $this->username, $this->password );
if (! $this->conn) {
die ( "连接失败！" . mysql_error () );
}
mysql_select_db ( $this->dbname, $this->conn );
}

//执行dql语句
public function execute_dql($sql) {
$res = mysql_query ( $sql, $this->conn ) or die ( mysql_error () );
return $res;
}
//执行dql语句，但是返回的是一个数组
public function execute_dql2($sql) {
$arr = array ();
$res = mysql_query ( $sql, $this->conn ) or die ( mysql_error () );
//把$res中的资源放到数组中区
while ( $row = mysql_fetch_assoc ( $res ) ) {
$arr [] = $row;
}
//这里可以立即关闭$res
mysql_free_result ( $res );
return $arr;
}

//考虑分页情况的查询
//sql1="select * from where limit 0,6";
//sql2="select count(id) from ";
public function execute_dql_fenye($sql1, $sql2, $fenyePage) {
//这里查询到了要分页显示的数据
$res = mysql_query ( $sql1, $this->conn ) or die ( mysql_error () );
$arr = array ();
//把$res转移到$arr
while ( $row = mysql_fetch_assoc ( $res ) ) {
$arr [] = $row;
}
mysql_free_result ( $res );

$res2 = mysql_query ( $sql2, $this->conn ) or die ( mysql_error () );
if ($row = mysql_fetch_row ( $res2 )) {
$fenyePage->pageCount = ceil ( $row [0] / $fenyePage->pageSize );
$fenyePage->rowCount = $row [0];
}
mysql_free_result ( $res2 );

//把导航信息也封装到fenyePage对象中
$navigate="";
if ($fenyePage->pageNow > 1) {
$prePage = $fenyePage->pageNow - 1;
$navigate= "<a href='empList.php? pageNow=$prePage'>上一页</a> ";
}
if ($fenyePage->pageNow < $fenyePage->pageCount) {
$nextPage = $fenyePage->pageNow + 1;
$navigate.= "<a href='empList.php? pageNow=$nextPage'>下一页</a> ";
}
//把$arr赋值给$fenyePage
$fenyePage->res_array = $arr;
$fenyePage->navigate=$navigate;
}

//执行dml语句
public function execute_dml($sql) {
$b = mysql_query ( $sql, $this->conn );
if (! $b) {
return 0; //表示失败
} else {
if (mysql_affected_rows ( $this->conn ) > 0) {
return 1; //表示执行ok
} else {
return 2; //表示没有受影响的行
}
}
}
//关闭连接的方法
public function close_connect() {
if (! empty ( $this->conn )) {
mysql_close ( $this->conn );
}
}
}
?>

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