求工厂模式详细解释

给你个史上最牛的"工厂模式"入门教程，幸亏我收藏了

http://bbs.csdn.net/topics/390894957强悍的不需解释
1.你的工厂模式有些地方是错误的
<?php//抽象产品
interface Work {
    public function doWork();
}//具体产品实现
class Student implements Work {    function doWork(){
        echo "学生做作业！\n";
    }
}class Teacher implements Work {    function doWork(){
        echo "老师批改作业！\n";
    }
}//抽象工厂
interface WorkerFactory {
    public function getWorker();
}//具体抽象工厂实现
class StudentFactory implements WorkerFactory {    function getWorker(){
        return new Student();
    }
}class TeacherFactory implements WorkerFactory  {
    function getWorker(){
        return new Teacher();
    }
}//客户端
class Client {    static function main() {        $s = new StudentFactory();        $s->getWorker()->doWork();        $t = new TeacherFactory();        $t->getWorker()->doWork();
    }
}Client::main();
?>2.PHP来学习工厂模式是相当不适合的  因为是弱类型下面是改写成的C++/*
* share.cc
*
*  Created on: 2014年9月30日
*      Author: shikiliu
*/#include <iostream>using namespace std;class Work{public:
virtual void doWork()=0; virtual ~Work(){}
};
class WorkerFactory{public:
virtual  Work* getWorker()=0;
virtual ~WorkerFactory(){}
};class Student:public Work{public:
void doWork(){
cout<<"Student doWork"<<endl;
}
~Student(){ }};
class Teacher:public Work{
public:
void doWork(){
cout<<"Teacher doWork"<<endl;
}
~Teacher(){ }};class  StudentFactory: public WorkerFactory{
public:
Work* getWorker(){
return new Student();
}
~StudentFactory(){ }};class  TeacherFactory:public WorkerFactory{
public:
Work* getWorker(){
return new Teacher();
}
~TeacherFactory(){ }
};WorkerFactory *getFactory(){ return new StudentFactory();
}/**********以上为工厂模式下面为使用的客户***********/void client(){ WorkerFactory *factory = getFactory();
Work* work = factory->getWorker();
work->doWork();
delete factory;
delete work;
}int main() {
client();
}
当我们新增校长以后  客户端的程序不需要修改只需要增加代码成下面这个样子
#include <iostream>using namespace std;class Work{public:
virtual void doWork()=0; virtual ~Work(){}
};
class WorkerFactory{public:
virtual  Work* getWorker()=0;
virtual ~WorkerFactory(){}
};class Student:public Work{public:
void doWork(){
cout<<"Student doWork"<<endl;
}
~Student(){ }};
class Teacher:public Work{
public:
void doWork(){
cout<<"Teacher doWork"<<endl;
}
~Teacher(){ }};class Schoolmaster:public Work{
public:
void doWork(){
cout<<"Schoolmaster doWork"<<endl;
}
~Schoolmaster(){ }
};class  StudentFactory: public WorkerFactory{
public:
Work* getWorker(){
return new Student();
}
~StudentFactory(){ }};class  TeacherFactory:public WorkerFactory{
public:
Work* getWorker(){
return new Teacher();
}
~TeacherFactory(){ }
};
class  SchoolmasterFactory:public WorkerFactory{
public:
Work* getWorker(){
return new Schoolmaster();
}
~SchoolmasterFactory(){ }
};
WorkerFactory *getFactory(){ return new SchoolmasterFactory();
}/**********以上为工厂模式下面为使用的客户***********/void client(){ WorkerFactory *factory = getFactory();
Work* work = factory->getWorker();
work->doWork();
delete factory;
delete work;
}int main() {
client();
}
工厂模式定义：实例化对象，用工厂方法代替new操作也就是说，除了工厂（Factory）类以外，其他地方都不应出现 newinterface 是接口
只要实现了（implements）该接口的类，都可以通过接口中声明的方法进行沟通。而与类本身无关//动作接口
interface Work {
    public function doWork();
}

//学生
class Student implements Work {
    function doWork(){
        echo "学生做作业！\n";
    }
}  //老师
class Teacher implements Work {
    function doWork(){
        echo "老师批改作业！\n";
    }
}

//工厂
class Factory {
    static function create($what){
        return new $what();
    }
}

//客户端
class Client {
    static function main() {
        Factory::create('student')->doWork();
        Factory::create('teacher')->doWork();
    }
}

Client::main();

调试易

求工厂模式详细解释

解决方案 »