24种设计模式--工厂模式(Factory)创建型
目录
1.简单工厂模式 simpleFactory
概述
工厂模式中,我们在创建对象时不会对客户端暴露创建逻辑,并且是通过使用一个共同的接口来指向新创建的对象。
何时使用:我们明确地计划不同条件下创建不同实例时。
接口类
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public interface Phone {
void makeCall();
}
实现类
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Phone;
/**
* 大汉软件
*/
public class HuaweiPhoneImpl implements Phone {
@Override
public void makeCall() {
System.out.println("用华为手机打电话");
}
}
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Phone;
/**
* 大汉软件
*/
public class MiPhoneImpl implements Phone {
@Override
public void makeCall() {
System.out.println("用小米手机打电话");
}
}
简单工场类
package com.dahan.simlpefactory;
import com.dahan.simlpefactory.impl.HuaweiPhoneImpl;
import com.dahan.simlpefactory.impl.MiPhoneImpl;
/**
* 大汉软件
*/
public class SimplePhoneFactory {
public Phone getBean(String phoneType) {
Phone phone;
if ("mi".equals(phoneType)) {
phone = new MiPhoneImpl();
} else if ("huawei".equals(phoneType)) {
phone = new HuaweiPhoneImpl();
} else {
return null;
}
return phone;
}
}
测试类
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public class Test {
public static void main(String[] args) {
SimplePhoneFactory factory = new SimplePhoneFactory();
Phone mi = factory.getBean("mi");
mi.makeCall();
Phone huawei = factory.getBean("huawei");
huawei.makeCall();
}
}
测试结果:
用小米手机打电话
用华为手机打电话
2.抽象工厂模式 AbstractFactory
概述
抽象工厂模式(Abstract Factory Pattern)是围绕一个超级工厂创建其他工厂。该超级工厂又称为其他工厂的工厂
接口
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public interface Phone {
void makeCall();
}
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public interface Watch {
void LookTime();
}
实现类
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Phone;
/**
* 大汉软件
*/
public class HuaweiPhoneImpl implements Phone {
@Override
public void makeCall() {
System.out.println("用华为手机打电话");
}
}
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Phone;
/**
* 大汉软件
*/
public class MiPhoneImpl implements Phone {
@Override
public void makeCall() {
System.out.println("用小米手机打电话");
}
}
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Watch;
/**
* 大汉软件
*/
public class HuaweiWatchImpl implements Watch {
@Override
public void LookTime() {
System.out.println("华为手环看时间");
}
}
package com.dahan.simlpefactory.impl;
import com.dahan.simlpefactory.Watch;
/**
* 大汉软件
*/
public class MiWatchImpl implements Watch {
@Override
public void LookTime() {
System.out.println("小米手环看时间");
}
}
抽象工厂类、抽象工厂实现类
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public abstract class AbstractFactory {
public abstract Phone getPhone(String phoneType);
public abstract Watch getWatch(String watchType);
}
package com.dahan.simlpefactory;
import com.dahan.simlpefactory.impl.HuaweiPhoneImpl;
import com.dahan.simlpefactory.impl.MiPhoneImpl;
/**
* 大汉软件
*/
public class PhoneFactory extends AbstractFactory {
@Override
public Phone getPhone(String phoneType) {
if(phoneType == null){
return null;
}
if(phoneType.equalsIgnoreCase("mi")){
return new MiPhoneImpl();
} else if(phoneType.equalsIgnoreCase("huawei")){
return new HuaweiPhoneImpl();
} else {
return null;
}
}
@Override
public Watch getWatch(String watchType) {
return null;
}
}
package com.dahan.simlpefactory;
import com.dahan.simlpefactory.impl.HuaweiWatchImpl;
import com.dahan.simlpefactory.impl.MiWatchImpl;
/**
* 大汉软件
*/
public class WatchFactory extends AbstractFactory {
@Override
public Phone getPhone(String watchType) {
return null;
}
@Override
public Watch getWatch(String watchType) {
if (watchType == null) {
return null;
}
if (watchType.equalsIgnoreCase("mi")) {
return new MiWatchImpl();
} else if (watchType.equalsIgnoreCase("huawei")) {
return new HuaweiWatchImpl();
} else {
return null;
}
}
}
工厂创造器
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public class FactoryProducer {
public static AbstractFactory getFactory(String choice) {
if (choice.equalsIgnoreCase("phone")) {
return new PhoneFactory();
} else if (choice.equalsIgnoreCase("watch")) {
return new WatchFactory();
}
return null;
}
}
测试类
package com.dahan.simlpefactory;
/**
* 大汉软件
*/
public class Test {
public static void main(String[] args) {
AbstractFactory factory = FactoryProducer.getFactory("phone");
assert factory != null;
Phone miPhone = factory.getPhone("mi");
Phone huaweiPhone = factory.getPhone("huawei");
miPhone.makeCall();
huaweiPhone.makeCall();
factory = FactoryProducer.getFactory("watch");
assert factory != null;
Watch miWatch = factory.getWatch("mi");
Watch huaweiWatch = factory.getWatch("huawei");
miWatch.LookTime();
huaweiWatch.LookTime();
}
}
测试结果
用小米手机打电话
用华为手机打电话
小米手环看时间
华为手环看时间
参考链接
本文来自博客园,作者:土木转行的人才,转载请注明原文链接