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uml图 6大设计原则
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‎.gitignore

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# Compiled class file
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*.class
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target/
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.jar
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*.war
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*.nar
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# idea
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.idea/
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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# iml
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*.iml

‎README.md

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## design pattern 参考《大话设计模式》
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### 创建型模式
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参考《大话设计模式》
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# 23种设计模式
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**创建型模式**
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- [简单工厂模式](src/designpattern/creation/factory/simple/Calculator.java)
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- [工厂方法模式](src/designpattern/creation/factory/method/FactoryClient.java)
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- [抽象工厂模式](src/designpattern/creation/factory/abstraction/Client.java)
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- [原型模式](src/designpattern/creation/prototype/PrototypeClient.java)
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- [建造者模式](src/designpattern/creation/builder/BuilderClient.java)
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- [单例模式](src/designpattern/creation/singleton/SingletonClient.java)
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### 结构型模式
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**结构型模式**
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- [适配器模式](src/designpattern/structural/adapter/AdapterClient.java)
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- [桥接模式](src/designpattern/structural/bridge/BridgeClient.java)
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- [组合模式](src/designpattern/structural/composite/CompositeClient.java)
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- [装饰模式](src/designpattern/structural/decorator/DecoratorClient.java)
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- [外观模式](src/designpattern/structural/facade/FacadeClient.java)
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- [享元模式](src/designpattern/structural/flyweight/FlyWeightClient.java)
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- [代理模式](src/designpattern/structural/proxy/ProxyClient.java)
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### 行为模式（类行为型模式）
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**行为模式（类行为型模式）**
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- [解释器模式](src/designpattern/behavioral/interpreter/InterpreterClient.java)
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- [模板方法模式](src/designpattern/behavioral/template/TemplateClient.java)
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### 行为模式（对象行为型模式）
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**行为模式（对象行为型模式）**
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- [策略模式](src/designpattern/behavioral/strategy/StrategyClient.java)
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- [观察者模式](src/designpattern/behavioral/observer/ObserverClient.java)
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- [状态模式](src/designpattern/behavioral/state/StateClient.java)
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- [职责链模式](src/designpattern/behavioral/responsibilitychain/Client.java)
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- [中介者模式](src/designpattern/behavioral/mediator/MediatorClient.java)
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- [访问者模式](src/designpattern/behavioral/visitor/VisitorClient.java)
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# 程序设计6大原则
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- 单一职责原则（SRP）
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就一个类而言，应该仅有一个引起它变化的原因。
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- 里氏替换原则（LSP）
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子类型必须能够替换掉它们的父类型。
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- 接口隔离原则
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接口最小化原则
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- 依赖倒置原则
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高层模块不应该依赖低层模块，两个都应该依赖抽象；<br>抽象不应该依赖细节，细节应该依赖抽象；
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- 迪米特原则（LoD）
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如果两个类不必彼此直接通信，那么这两个类就不应当发生直接的相互作用。如果其中一个类需要调用另一个类的某一个方法的话，可以通过第三者转发这个调用。
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- 开闭原则
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软件实现（类、模块、函数等等）应该可以扩展，但是不可修改。
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# UML类图和类之间的关系
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**UML 类图**
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- 类
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![](images/wpsED7E.tmp.jpg)
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类图分三层：
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第一层显示类的名称，如果是抽象类，则就用斜体显示。<br>第二层是类的特性，通常就是字段和属性。<br>第三层是类的操作，通常是方法或行为。注意前面的符号，‘+’表示public，‘-’表示private，‘#’表示protected.
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- 接口类
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![](images/wpsED7F.tmp.jpg)
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第一行是接口名称。第二行是接口方法。
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**类之间的关系**
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- 01继承类
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继承关系用空心三角形 + 实线来表示。
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![](images/wpsED91.tmp.jpg)
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- 02实现接口类
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实现接口用空心三角形 + 虚线来表示。
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![](images/wpsEDA1.tmp.jpg)
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- 03关联关系
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关联关系用实际箭头来表示。
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![](images/wpsEDA2.tmp.jpg)
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看企鹅和气候两个类，企鹅是很特别的鸟，会游不会飞。更重要的是，它与气候有很大的关联。当一个类知道另一个类时，可以用关联（association）。
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- 04聚合关系
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聚合关系用空心的菱形 + 实绩箭头来表示。
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我们再来看大雁与雁群这两个类。
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<img src="images/wpsEDB3.tmp.jpg" style="zoom:80%;" />
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![](images/wpsEDB4.tmp.jpg)
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- 05组合关系
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用实心的菱形 + 实心箭头来表示。
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组合关系是一种强的拥有关系，体现了严格的部分和整体的关系，部分和整体的生命周期一样。
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![](images/wpsEDC5.tmp.jpg)
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在这里鸟和其翅膀就是组合关系，因为它们是部分和整体的关系，并且翅膀和鸟的生命周期是相同的。
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另外，你会注意到合成关系的连线两端还有一个数字‘1’和数字‘2’，这被称为基数。
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表明这一端的类可以有几个实例，很显然，一个鸟应该有两只翅膀。
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如果一个类可能有无数个实例，则就用‘n’来表示。
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- 06依赖关系
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动物几大特征，比如有新陈代谢，能繁殖。而动物要有生命力，需要氧气、水以及食物等。
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也就是说，动物依赖于氧气和水。它们之间是依赖关系（Dependency），用虚线箭头来表示。
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![](images/wpsEDC6.tmp.jpg)
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![](images/wpsEDD6.tmp.jpg)
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‎src/designpattern/creation/factory/abstraction/Client.java

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* @author yangll
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*/
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public class Client {
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public static void main(String[] args) throws InstantiationException,
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IllegalAccessException {
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public static void main(String[] args) throws InstantiationException, IllegalAccessException {
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Operation operation = OperationFactory.createOperation("/");
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operation.numberA = 7;

‎src/designpattern/creation/factory/abstraction/OperationFactory.java

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allOperationMaps.put("/", OperationDiv.class);
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}
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public static Operation createOperation(String operator)
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throws InstantiationException, IllegalAccessException {
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public static Operation createOperation(String operator) throws InstantiationException, IllegalAccessException {
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Operation operation;
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Class<?> operationClass = allOperationMaps.get(operator);

‎src/designpattern/creation/factory/method/AddFactory.java

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package designpattern.creation.factory.method;
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import designpattern.creation.factory.simple.Operation;
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import designpattern.creation.factory.simple.OperationAdd;
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public class AddFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationAdd();
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}
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}

‎src/designpattern/creation/factory/method/DivFactory.java

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package designpattern.creation.factory.method;
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import designpattern.creation.factory.simple.Operation;
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import designpattern.creation.factory.simple.OperationDiv;
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public class DivFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationDiv();
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}
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}

‎src/designpattern/creation/factory/method/FactoryClient.java

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* @author yangll
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*/
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public class FactoryClient {
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public static void main(String[] args) {
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IFactory operFactory = new DivFactory();
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Operation operation = operFactory.createOperation();

‎src/designpattern/creation/factory/method/IFactory.java

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package designpattern.creation.factory.method;
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import designpattern.creation.factory.simple.*;
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import designpattern.creation.factory.simple.Operation;
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/**
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* 工厂接口
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*
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*/
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public interface IFactory {
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public Operation createOperation();
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}
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class AddFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationAdd();
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}
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}
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class SubFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationSub();
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}
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}
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class MulFactory implements IFactory {
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public Operation createOperation() {
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return new OperationMul();
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}
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}
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}
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Operation createOperation();
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}

‎src/designpattern/creation/factory/method/IFactory.uml

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<?xml version="1.0" encoding="UTF-8"?>
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<Diagram>
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<ID>JAVA</ID>
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<OriginalElement>designpattern.creation.factory.method.IFactory</OriginalElement>
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<nodes>
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<node x="762.0" y="103.0">designpattern.creation.factory.method.AddFactory</node>
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<node x="381.0" y="0.0">designpattern.creation.factory.method.IFactory</node>
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<node x="508.0" y="103.0">designpattern.creation.factory.method.DivFactory</node>
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<node x="0.0" y="201.0">designpattern.creation.factory.method.FactoryClient</node>
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<node x="254.0" y="103.0">designpattern.creation.factory.method.SubFactory</node>
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<node x="0.0" y="103.0">designpattern.creation.factory.method.MulFactory</node>
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</nodes>
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<notes />
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<edges>
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<edge source="designpattern.creation.factory.method.SubFactory" target="designpattern.creation.factory.method.IFactory">
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<point x="0.0" y="-26.5" />
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<point x="371.0" y="83.0" />
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<point x="468.75" y="83.0" />
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<point x="-29.25" y="26.5" />
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</edge>
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<edge source="designpattern.creation.factory.method.DivFactory" target="designpattern.creation.factory.method.IFactory">
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<point x="0.0" y="-26.5" />
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<point x="625.0" y="83.0" />
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<point x="527.25" y="83.0" />
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<point x="29.25" y="26.5" />
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</edge>
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<edge source="designpattern.creation.factory.method.AddFactory" target="designpattern.creation.factory.method.IFactory">
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<point x="0.0" y="-26.5" />
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<point x="879.0" y="73.0" />
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<point x="585.75" y="73.0" />
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<point x="87.75" y="26.5" />
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</edge>
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<edge source="designpattern.creation.factory.method.MulFactory" target="designpattern.creation.factory.method.IFactory">
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<point x="0.0" y="-26.5" />
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<point x="117.0" y="73.0" />
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<point x="410.25" y="73.0" />
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<point x="-87.75" y="26.5" />
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</edge>
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</edges>
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<settings layout="Hierarchic Group" zoom="1.0" x="258.0" y="15.0" />
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<SelectedNodes>
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<node>designpattern.creation.factory.method.FactoryClient</node>
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</SelectedNodes>
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<Categories>
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<Category>Fields</Category>
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<Category>Methods</Category>
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</Categories>
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<SCOPE>All</SCOPE>
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<VISIBILITY>public</VISIBILITY>
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</Diagram>
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‎src/designpattern/creation/factory/method/MulFactory.java

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package designpattern.creation.factory.method;
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import designpattern.creation.factory.simple.Operation;
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import designpattern.creation.factory.simple.OperationMul;
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public class MulFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationMul();
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}
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}

‎src/designpattern/creation/factory/method/SubFactory.java

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package designpattern.creation.factory.method;
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import designpattern.creation.factory.simple.Operation;
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import designpattern.creation.factory.simple.OperationSub;
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public class SubFactory implements IFactory {
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@Override
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public Operation createOperation() {
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return new OperationSub();
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}
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}

‎src/designpattern/creation/factory/simple/OperationFactory.java

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*/
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public class OperationFactory {
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public static Operation createOperation(char operator) {
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Operation operation = null;
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Operation operation;
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switch (operator) {
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case '+':

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