update README.md

Author: youlookwhat

README.md

@@ -5,7 +5,7 @@
 
  - **创建型模式**：[单例模式](https://github.com/youlookwhat/DesignPattern#3-单例设计模式)、[抽象工厂模式](https://github.com/youlookwhat/DesignPattern#2-工厂模式)、[建造者模式](https://github.com/youlookwhat/DesignPattern#11-建造者模式)、[工厂模式](https://github.com/youlookwhat/DesignPattern#2-工厂模式)、[原型模式](https://github.com/youlookwhat/DesignPattern#12-原型模式)。
  - **结构型模式**：[适配器模式](https://github.com/youlookwhat/DesignPattern#5-适配器模式)、[桥接模式](https://github.com/youlookwhat/DesignPattern#15-桥接模式)、[装饰模式](https://github.com/youlookwhat/DesignPattern#7-装饰者模式)、[组合模式](https://github.com/youlookwhat/DesignPattern#16-组合模式)、[外观模式](https://github.com/youlookwhat/DesignPattern#8-外观模式)、[享元模式](https://github.com/youlookwhat/DesignPattern#13-享元模式)、[代理模式](https://github.com/youlookwhat/DesignPattern#14-代理模式)。
- - **行为型模式**：[模版方法模式](https://github.com/youlookwhat/DesignPattern#9-模板方法模式)、[命令模式](https://github.com/youlookwhat/DesignPattern#6-命令模式)、[迭代器模式](https://github.com/youlookwhat/DesignPattern#17-迭代器模式)、[观察者模式](https://github.com/youlookwhat/DesignPattern#1-观察者模式)、[中介者模式](https://github.com/youlookwhat/DesignPattern#18-中介者模式)、[备忘录模式](https://github.com/youlookwhat/DesignPattern#19-备忘录模式)、解释器模式、[状态模式](https://github.com/youlookwhat/DesignPattern#10-状态模式)、[策略模式](https://github.com/youlookwhat/DesignPattern#4-策略模式)、职责链模式(责任链模式)、访问者模式。
+ - **行为型模式**：[模版方法模式](https://github.com/youlookwhat/DesignPattern#9-模板方法模式)、[命令模式](https://github.com/youlookwhat/DesignPattern#6-命令模式)、[迭代器模式](https://github.com/youlookwhat/DesignPattern#17-迭代器模式)、[观察者模式](https://github.com/youlookwhat/DesignPattern#1-观察者模式)、[中介者模式](https://github.com/youlookwhat/DesignPattern#18-中介者模式)、[备忘录模式](https://github.com/youlookwhat/DesignPattern#19-备忘录模式)、[解释器模式](https://github.com/youlookwhat/DesignPattern#20-解释器模式)、[状态模式](https://github.com/youlookwhat/DesignPattern#10-状态模式)、[策略模式](https://github.com/youlookwhat/DesignPattern#4-策略模式)、职责链模式(责任链模式)、访问者模式。
 
 > 参照Hongyang、菜鸟教程、极客学院等处文章所写。如有错误欢迎指正，如有侵权，请联系我删除。
 
@@ -52,6 +52,8 @@
 
  - 19.[ 设计模式 备忘录模式(Memento Pattern) 以使用备忘录为例](https://www.runoob.com/design-pattern/memento-pattern.html)
 
+ - 20.[ 设计模式 解释器模式(Interpreter Pattern) 以解释一句话为例](https://www.runoob.com/design-pattern/interpreter-pattern.html)
+
 
 ## Source Code
 > - 1. [Observer](https://github.com/youlookwhat/DesignPattern/tree/master/app/src/main/java/com/example/jingbin/designpattern/observer)
@@ -73,6 +75,7 @@
 > - 17. [Iterator](https://github.com/youlookwhat/DesignPattern/tree/master/app/src/main/java/com/example/jingbin/designpattern/iterator)
 > - 18. [Mediator](https://github.com/youlookwhat/DesignPattern/tree/master/app/src/main/java/com/example/jingbin/designpattern/mediator)
 > - 19. [Memento](https://github.com/youlookwhat/DesignPattern/tree/master/app/src/main/java/com/example/jingbin/designpattern/memento)
+> - 20. [Interpreter](https://github.com/youlookwhat/DesignPattern/tree/master/app/src/main/java/com/example/jingbin/designpattern/interpreter)
 
 ## Project Picture
 
@@ -1190,6 +1193,108 @@
      */
 	```
 
+### 20. 解释器模式
+> 提供了评估语言的语法或表达式的方式，它属于行为型模式。这种模式实现了一个表达式接口，该接口解释一个特定的上下文。这种模式被用在 SQL 解析、符号处理引擎等。
+
+ - **主要解决**：对于一些固定文法构建一个解释句子的解释器。
+
+最小单元步骤：
+
+ - 1、创建一个表达式接口 Expression。
+
+	```java
+	public interface Expression {
+	    public boolean interpreter(String content);
+	}
+	```
+
+ - 2、创建实现了上述接口的实体类。TerminalExpression、OrExpression、AndExpression。
+
+	```java
+	public class TerminalExpression implements Expression {
+	
+		private String data;
+		
+		public TerminalExpression(String data) {
+		    this.data = data;
+		}
+		
+		@Override
+		public boolean interpreter(String content) {
+		   // 是包含判断
+		    return content.contains(data);
+		}
+	}
+	```
+
+	```java
+	public class OrExpression implements Expression {
+	
+	    private Expression expression1;
+	    private Expression expression2;
+	
+	    public OrExpression(Expression expression1, Expression expression2) {
+	        this.expression1 = expression1;
+	        this.expression2 = expression2;
+	    }
+	
+	    @Override
+	    public boolean interpreter(String content) {
+	        return expression1.interpreter(content) || expression2.interpreter(content);
+	    }
+	}
+	```
+
+	```java
+	public class AndExpression implements Expression {
+	
+	    private Expression expression1;
+	    private Expression expression2;
+	
+	    public AndExpression(Expression expression1, Expression expression2) {
+	        this.expression1 = expression1;
+	        this.expression2 = expression2;
+	    }
+	
+	    @Override
+	    public boolean interpreter(String content) {
+	        return expression1.interpreter(content) && expression2.interpreter(content);
+	    }
+	}
+	```
+
+ - 3、使用 Expression 类来创建规则，并解析它们。
+
+	```java
+    /**
+     * 规则：jingbin 和 youlookwhat 是男性
+     */
+    public static Expression getMaleExpression() {
+        TerminalExpression jingbin = new TerminalExpression("jingbin");
+        TerminalExpression youlookwhat = new TerminalExpression("youlookwhat");
+        return new OrExpression(jingbin, youlookwhat);
+    }
+
+    /**
+     * 规则：Julie 是一个已婚的女性
+     */
+    public static Expression getMarriedWomanExpression() {
+        TerminalExpression julie = new TerminalExpression("Julie");
+        TerminalExpression married = new TerminalExpression("Married");
+        return new AndExpression(julie, married);
+    }
+
+	Expression maleExpression = getMaleExpression();
+	// jingbin is male: true
+	Log.e("---", "jingbin is male: " + maleExpression.interpreter("jingbin"));
+
+    Expression womanExpression = getMarriedWomanExpression();
+    // Julie is married woman: true
+    Log.e("---", "Julie is married woman: " + womanExpression.interpreter("Married Julie"));
+
+	```
+
+
 ## Download
  - [DesignPattern.apk](http://download.csdn.net/detail/jingbin_/9684545)