设计模式-工厂方法描述

大家好，我是Client。

天地开辟之初我便诞生了。

publicclassClient{publicstaticvoidmain(String[]args){}}

@startuml class Client @enduml

后来又有两个家伙诞生了，一个是Factory。

interfaceFactory{}

另一个是Product.

interfaceProduct{}

@startuml class Client interface Factory interface Product @enduml

不过他们非常羸弱，被我轻松拿捏，任意驱使。

publicclassClient{publicstaticvoidmain(String[]args){Factoryfactory;Productproduct;}}

@startuml class Client{ + factory:Factory + product:Product } interface Factory interface Product Client o--Factory Client o--Product @enduml

你，Product，以后就是我的产品设计师了。

你，Factory，以后你就负责给我生产产品。

interfaceProduct{abstractvoidfunction();}

interfaceFactory{abstractProductcreateProduct();}

@startuml class Client{ + factory:Factory + product:Product } interface Factory{ +{abstract} createProduct():Product } interface Product{ +{abstract} function() } Client o--Factory Client o--Product @enduml

有一天我想吃苹果，我就给Product说，“去，给我设计苹果。

Product马不停蹄，立马给我设计了苹果。

classAppleimplementsProduct{@Overridepublicvoidfunction(){System.out.println("你吃了苹果");}}

@startuml class Client{ + factory:Factory + product:Product } interface Factory{ +{abstract} createProduct():Product } interface Product{ +{abstract} function() } class Apple{ + function() } Client o--Factory Client o--Product Product<|..Apple @enduml

Factory连夜赶工，加急建了一个苹果生产工厂开始生产苹果

classAppleFactoryimplementsFactory{@OverridepublicProductcreateProduct(){returnnewApple();}}

@startuml class Client{ + factory:Factory + product:Product } interface Factory{ +{abstract} createProduct():Product } interface Product{ +{abstract} function() } class Apple{ + function(); } class AppleFactory{ + createProduct():Apple } Client o--Factory Client o--Product Product<|..Apple Factory<|..AppleFactory AppleFactory..>Apple @enduml

我不需要知道他们具体是怎么操作的，反正我只要吃到苹果就行了。

publicclassClient{publicstaticvoidmain(String[]args){Factoryfactory;Productproduct;factory=newAppleFactory();product=factory.createProduct();product.function();}}

Product和Factory在我的奴役下熬过了漫长岁月。

有一天我想尝尝100年前的馒头。

Product为我设计了馒头。

classMantou100yearsAgoimplementsProduct{@Overridepublicvoidfunction(){System.out.println("馒头有毒，你死了”);}}

@startuml class Client{ + factory:Factory + product:Product } interface Factory{ +{abstract} createProduct():Product } interface Product{ +{abstract} function() } class Apple{ + function(); } class AppleFactory{ + createProduct():Apple } class Mantou100yearsAgo{ + function } Client o--Factory Client o--Product Product<|..Apple Factory<|..AppleFactory AppleFactory..>Apple Factory<|..Mantou100yearsAgo @enduml

Factory建立了馒头工厂为我生产馒头

classMantouFactoryimplementsFactory{@OverridepublicProductcreateProduct(){returnnewMantou100yearsAgo();}}

@startuml class Client{ + factory:Factory + product:Product } interface Factory{ +{abstract} createProduct():Product } interface Product{ +{abstract} function() } class Apple{ + function(); } class AppleFactory{ + createProduct():Apple } class Mantou100yearsAgo{ + function } class MantouFactory{ + createFactory() } Client o--Factory Client o--Product Product<|..Apple Factory<|..AppleFactory AppleFactory..>Apple Product<|..Mantou100yearsAgo Factory<|..MantouFactory MantouFactory..>Mantou100yearsAgo @enduml

我也算是吃上了100年前的馒头

publicclassClient{publicstaticvoidmain(String[]args){Factoryfactory;Productproduct;factory=newAppleFactory();product=factory.createProduct();product.function();factory=newMantouFactory();product=factory.createProduct();product.function();}}

我死了，世界毁灭了。