php設(shè)計(jì)模式 Command(命令模式)
更新時(shí)間:2011年06月17日 01:05:28 作者:
將一個(gè)請(qǐng)求封裝為一個(gè)對(duì)象從而使你可用不同的請(qǐng)求對(duì)客戶進(jìn)行參數(shù)化,對(duì)請(qǐng)求排除或記錄請(qǐng)求日志,以及支持可取消的操作
<?php
/**
* 命令模式
*
* 將一個(gè)請(qǐng)求封裝為一個(gè)對(duì)象從而使你可用不同的請(qǐng)求對(duì)客戶進(jìn)行參數(shù)化,對(duì)請(qǐng)求排除或記錄請(qǐng)求日志,以及支持可取消的操作
*/
interface Command
{
public function execute();
}
class Invoker
{
private $_command = array();
public function setCommand($command) {
$this->_command[] = $command;
}
public function executeCommand()
{
foreach($this->_command as $command)
{
$command->execute();
}
}
public function removeCommand($command)
{
$key = array_search($command, $this->_command);
if($key !== false)
{
unset($this->_command[$key]);
}
}
}
class Receiver
{
private $_name = null;
public function __construct($name) {
$this->_name = $name;
}
public function action()
{
echo $this->_name." action<br/>";
}
public function action1()
{
echo $this->_name." action1<br/>";
}
}
class ConcreteCommand implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
}
}
class ConcreteCommand1 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action1();
}
}
class ConcreteCommand2 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
$this->_receiver->action1();
}
}
$objRecevier = new Receiver("No.1");
$objRecevier1 = new Receiver("No.2");
$objRecevier2 = new Receiver("No.3");
$objCommand = new ConcreteCommand($objRecevier);
$objCommand1 = new ConcreteCommand1($objRecevier);
$objCommand2 = new ConcreteCommand($objRecevier1);
$objCommand3 = new ConcreteCommand1($objRecevier1);
$objCommand4 = new ConcreteCommand2($objRecevier2); // 使用 Recevier的兩個(gè)方法
$objInvoker = new Invoker();
$objInvoker->setCommand($objCommand);
$objInvoker->setCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->removeCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->setCommand($objCommand2);
$objInvoker->setCommand($objCommand3);
$objInvoker->setCommand($objCommand4);
$objInvoker->executeCommand();
[/code]
/**
* 命令模式
*
* 將一個(gè)請(qǐng)求封裝為一個(gè)對(duì)象從而使你可用不同的請(qǐng)求對(duì)客戶進(jìn)行參數(shù)化,對(duì)請(qǐng)求排除或記錄請(qǐng)求日志,以及支持可取消的操作
*/
interface Command
{
public function execute();
}
class Invoker
{
private $_command = array();
public function setCommand($command) {
$this->_command[] = $command;
}
public function executeCommand()
{
foreach($this->_command as $command)
{
$command->execute();
}
}
public function removeCommand($command)
{
$key = array_search($command, $this->_command);
if($key !== false)
{
unset($this->_command[$key]);
}
}
}
class Receiver
{
private $_name = null;
public function __construct($name) {
$this->_name = $name;
}
public function action()
{
echo $this->_name." action<br/>";
}
public function action1()
{
echo $this->_name." action1<br/>";
}
}
class ConcreteCommand implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
}
}
class ConcreteCommand1 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action1();
}
}
class ConcreteCommand2 implements Command
{
private $_receiver;
public function __construct($receiver)
{
$this->_receiver = $receiver;
}
public function execute()
{
$this->_receiver->action();
$this->_receiver->action1();
}
}
$objRecevier = new Receiver("No.1");
$objRecevier1 = new Receiver("No.2");
$objRecevier2 = new Receiver("No.3");
$objCommand = new ConcreteCommand($objRecevier);
$objCommand1 = new ConcreteCommand1($objRecevier);
$objCommand2 = new ConcreteCommand($objRecevier1);
$objCommand3 = new ConcreteCommand1($objRecevier1);
$objCommand4 = new ConcreteCommand2($objRecevier2); // 使用 Recevier的兩個(gè)方法
$objInvoker = new Invoker();
$objInvoker->setCommand($objCommand);
$objInvoker->setCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->removeCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->setCommand($objCommand2);
$objInvoker->setCommand($objCommand3);
$objInvoker->setCommand($objCommand4);
$objInvoker->executeCommand();
[/code]
相關(guān)文章
PHP設(shè)計(jì)模式之模板方法模式Template Method Pattern詳解
在我們實(shí)際開發(fā)中,如果一個(gè)方法極其復(fù)雜時(shí),如果我們將所有的邏輯寫在一個(gè)方法中,那維護(hù)起來就很困難,要替換某些步驟時(shí)都要重新寫,這樣代碼的擴(kuò)展性就很差,當(dāng)遇到這種情況就要考慮今天的主角——模板方法模式2022-12-12Laravel框架使用技巧之使用url()全局函數(shù)返回前一個(gè)頁面的地址方法詳解
這篇文章主要介紹了Laravel框架使用技巧之使用url()全局函數(shù)返回前一個(gè)頁面的地址,需要的朋友可以參考下2020-04-04PHP實(shí)現(xiàn)對(duì)數(shù)組簡單求交集,差集,并集功能示例
這篇文章主要介紹了PHP實(shí)現(xiàn)對(duì)數(shù)組簡單求交集,差集,并集功能,涉及php數(shù)組操作函數(shù)array_diff、array_intersect及array_merge的使用技巧,需要的朋友可以參考下2017-10-10PHP判斷一個(gè)數(shù)組是另一個(gè)數(shù)組子集的方法詳解
這篇文章主要介紹了PHP判斷一個(gè)數(shù)組是另一個(gè)數(shù)組子集的方法,結(jié)合實(shí)例形式分析了php循環(huán)遍歷、array_diff及array_intersect函數(shù)等方法實(shí)現(xiàn)數(shù)組子集判斷的相關(guān)操作技巧,需要的朋友可以參考下2017-07-07php恢復(fù)數(shù)組的key為數(shù)字序列的方法
這篇文章主要介紹了php恢復(fù)數(shù)組的key為數(shù)字序列的方法,涉及php操作數(shù)組鍵名的技巧,需要的朋友可以參考下2015-04-04