php设计模式 factory (工厂方法模式)
25种php设计模式,你全都知道吗?下面用代码介绍工厂方法模式(factory method模式)
<?php /** * 工厂方法模式 * * 定义一个用于创建对象的接口,让子类决定将哪一个类实例化,使用一个类的实例化延迟到其子类 */ /* class DBFactory { public static function create($type) { swtich($type) { case "Mysql": return new MysqlDB(); break; case "Postgre": return new PostgreDB(); break; case "Mssql": return new MssqlDB(); break; } } } */ class DBFactory { public static function create($type) { $class = $type . "DB"; return new $class; } } interface DB { public function connect(); public function exec(); } class MysqlDB implements DB { public function __construct() { echo "mysql db<br/>"; } public function connect() { } public functionexec() { } } class PostgreDB implements DB { public function __construct() { echo "Postgre db<br/>"; } public function connect() { } public function exec() { } } class MssqlDB implements DB { public function __construct() { echo "mssql db<br/>"; } public function connect() { } public function exec() { } } $oMysql = DBFactory::create("Mysql"); $oPostgre = DBFactory::create("Postgre"); $oMssql = DBFactory::create("Mssql");
其他相关设计模式:
http://www.phprm.com/develop/memento.html 备忘录模式(Memento模式)
http://www.phprm.com/develop/observer.html 观察者模式(Observer模式)
http://www.phprm.com/develop/template.html 模板方法模式(Template Method模式)
http://www.phprm.com/develop/command.html 命令模式(command模式)
http://www.phprm.com/develop/composite.html 组合模式(composite模式)
http://www.phprm.com/develop/flyweight.html 享元模式(flyweight模式)
http://www.phprm.com/develop/strategy.html 策略模式(strategy模式)
http://www.phprm.com/develop/state.html 状态模式(state模式)
http://www.phprm.com/develop/adapter.html 适配器模式(adapter模式)
http://www.phprm.com/develop/factory.html 工厂模式(factory模式)
http://www.phprm.com/develop/prototype.html 原型模式(prototype模式)
http://www.phprm.com/develop/facade.html 外观模式(facade模式)
http://www.phprm.com/develop/singleton.html 单例模式(singleton模式)
http://www.phprm.com/develop/bridge.html 桥梁模式(bridge模式)
http://www.phprm.com/develop/decorator.html 装饰模式(decorator模式)
http://www.phprm.com/develop/abstract.html 抽象工厂模式(abstract factory模式)
http://www.phprm.com/develop/builder.html 建造者模式(Builder模式)
http://www.phprm.com/develop/visitor.html 访问者模式(Visitor模式)
http://www.phprm.com/develop/interpreter.html 解释器模式(Interpreter模式)
http://www.phprm.com/develop/mediator.html 中介者模式(Mediator模式)
http://www.phprm.com/develop/chain.html 职责链模式(Chain Of Responsibility模式)
http://www.phprm.com/develop/proxy.html 代理模式(Proxy模式)
http://www.phprm.com/develop/interator.html 迭代器模式(Interator模式)
http://www.phprm.com/develop/dao.html 数据访问对象模式(DAO模式)
http://www.phprm.com/develop/delegation.html 委托模式(Delegation模式)
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