浅析php工厂模式

/**
?* 工厂模式
?*/
//抽象产品
interface Person {
??? public function getName();
}
//具体产品实现
class Teacher implements Person {
??? function getName() {
??????? return "老师n";
??? }
}
class Student implements Person {
??? function getName() {
??????? return "学生n";
??? }
}
//简单工厂
class SimpleFactory {
?????? public static function getPerson($type) {
????????????? $person = null;
????????????? if ($type == 'teacher') {
???????????????????? $person = new Teacher();
????????????? } elseif ($type == 'student') {
???????????????????? $person = new Student();
????????????? }
????????????? return $person;
?????? }
}
//简单工厂调用
class SimpleClient {
?????? function main() {
????????????? // 如果不用工厂模式,则需要提前指定具体类
????????????? // $person = new Teacher();
????????????? // echo $person->getName();
????????????? // $person = new Student();
????????????? // echo $person->getName();
????????????? // 用工厂模式,则不需要知道对象由什么类产生,交给工厂去决定
????????????? $person = SimpleFactory::getPerson('teacher');
????????????? echo $person->getName();
????????????? $person = SimpleFactory::getPerson('student');
????????????? echo $person->getName();
?????? }
}
//工厂办法
interface CommFactory {
??? public function getPerson();
}
//具体工厂实现
class StudentFactory implements CommFactory {
??? function getPerson(){
??????? return new Student();
??? }
}
class TeacherFactory implements CommFactory {
??? function getPerson() {
??????? return new Teacher();
??? }
}
//工厂办法调用
class CommClient {
??? static function main() {
?????????? $factory = new TeacherFactory();
?????????? echo $factory->getPerson()->getName();
?????????? $factory = new StudentFactory();
?????????? echo $factory->getPerson()->getName();
??? }
}
//抽象工厂模式另一条产品线
interface Grade {
?????? function getYear();
}
//另一条产品线的具体产品
class Grade1 implements Grade {
?????? public function getYear() {
????????????? return '2003级';
?????? }
}
class Grade2 implements Grade {
?????? public function getYear() {
????????????? return '2004级';
?????? }
}
//抽象工厂
interface AbstractFactory {
?????? function getPerson();
?????? function getGrade();
}
//具体工厂可以产生每个产品线的产品
class Grade1TeacherFactory implements AbstractFactory {
?????? public function getPerson() {
????????????? return new Teacher();
?????? }
?????? public function getGrade() {
????????????? return new Grade1();
?????? }
}
class Grade1StudentFactory implements AbstractFactory {
?????? public function getPerson() {
????????????? return new Student();
?????? }
?????? public function getGrade() {
????????????? return new Grade1();
?????? }
}
class Grade2TeacherFactory implements AbstractFactory {
?????? public function getPerson() {
????????????? return new Teacher();
?????? }
?????? public function getGrade() {
????????????? return new Grade2();
?????? }
}
//抽象工厂调用
class FactoryClient {
?????? function printInfo($factory) {
????????????? echo $factory->getGrade()->getYear().$factory->getPerson()->getName();
?????? }
?????? function main() {
????????????? $client = new FactoryClient();
????????????? $factory = new Grade1TeacherFactory();
????????????? $client->printInfo($factory);
????????????? $factory = new Grade1StudentFactory();
????????????? $client->printInfo($factory);
????????????? $factory = new Grade2TeacherFactory();
????????????? $client->printInfo($factory);
?????? }
}
//简单工厂
//SimpleClient::main();
//工厂办法
//CommClient::main();
//抽象工厂
FactoryClient::main();