中介者模式

Folgerjun · web-flow · commit 7ad5e8f0414a · 2018-03-12T10:44:04.000+08:00
中介者模式
diff --git a/java-des/src/com/java/design/mediator/Colleague.java b/java-des/src/com/java/design/mediator/Colleague.java
@@ -0,0 +1,15 @@
+package com.java.design.mediator;
+
+public class Colleague {
+
+	protected String name;
+
+	protected Mediator mediator;
+
+	public Colleague(String name, Mediator mediator) {
+
+		this.mediator = mediator;
+		this.name = name;
+	}
+
+}
diff --git a/java-des/src/com/java/design/mediator/ColleagueA.java b/java-des/src/com/java/design/mediator/ColleagueA.java
@@ -0,0 +1,20 @@
+package com.java.design.mediator;
+
+public class ColleagueA extends Colleague {
+
+	public ColleagueA(String name, Mediator mediator) {
+
+		super(name, mediator);
+	}
+
+	public void getMessage(String message) {
+
+		System.out.println(name + "收到消息:" + message);
+	}
+
+	// 与中介者通讯
+	public void contact(String message) {
+		mediator.contact(message, this);
+	}
+
+}
diff --git a/java-des/src/com/java/design/mediator/ColleagueB.java b/java-des/src/com/java/design/mediator/ColleagueB.java
@@ -0,0 +1,20 @@
+package com.java.design.mediator;
+
+public class ColleagueB extends Colleague {
+
+	public ColleagueB(String name, Mediator mediator) {
+
+		super(name, mediator);
+	}
+
+	public void getMessage(String message) {
+
+		System.out.println(name + "收到消息:" + message);
+	}
+
+	// 与中介者通讯
+	public void contact(String message) {
+		mediator.contact(message, this);
+	}
+
+}
diff --git a/java-des/src/com/java/design/mediator/ConcreteMediator.java b/java-des/src/com/java/design/mediator/ConcreteMediator.java
@@ -0,0 +1,42 @@
+package com.java.design.mediator;
+
+/**
+ * 定义具体中介者ConcreteMediator,具体中介者通过协调各同事对象实现协作行为，了解并维护它的各个同事。
+ * 
+ * @author Administrator
+ *
+ */
+public class ConcreteMediator extends Mediator {
+
+	ColleagueA colleagueA;
+
+	ColleagueB colleagueB;
+
+	public ColleagueA getColleagueA() {
+		return colleagueA;
+	}
+
+	public void setColleagueA(ColleagueA colleagueA) {
+		this.colleagueA = colleagueA;
+	}
+
+	public ColleagueB getColleagueB() {
+		return colleagueB;
+	}
+
+	public void setColleagueB(ColleagueB colleagueB) {
+		this.colleagueB = colleagueB;
+	}
+
+	@Override
+	public void contact(String message, Colleague colleague) {
+
+		if (colleague == colleagueA) {
+			// 制定规则 ： 如果是A 则发送给 B
+			colleagueB.getMessage(message);
+		} else if (colleague == colleagueB) {
+			// 如果是B 则发送给A
+			colleagueA.getMessage(message);
+		}
+	}
+}
diff --git a/java-des/src/com/java/design/mediator/Mediator.java b/java-des/src/com/java/design/mediator/Mediator.java
@@ -0,0 +1,13 @@
+package com.java.design.mediator;
+
+/**
+ * 定义抽象 Mediator 中介者 ,可以与其他同时进行联络
+ * 
+ * @author Administrator
+ *
+ */
+public abstract class Mediator {
+
+	public abstract void contact(String message, Colleague colleague);
+
+}
diff --git a/java-des/src/com/java/design/mediator/MediatorPattern.java b/java-des/src/com/java/design/mediator/MediatorPattern.java
@@ -0,0 +1,21 @@
+package com.java.design.mediator;
+
+/**
+ * 中介者模式 -----> 用一个中介对象来封装一系列的对象交互。中介者使各对象不需要显式地相互引用，从而使其耦合松散，而且可以独立地改变它们之间的交互。
+ * 
+ * @author Administrator
+ *
+ */
+public class MediatorPattern {
+
+	public static void main(String[] args) {
+
+		ConcreteMediator mediator = new ConcreteMediator();
+		ColleagueA colleagueA = new ColleagueA("A", mediator);
+		ColleagueB colleagueB = new ColleagueB("B", mediator);
+		mediator.setColleagueA(colleagueA);
+		mediator.setColleagueB(colleagueB);
+		colleagueA.contact("B 啊 我在找你啊 ...");
+		colleagueB.contact("A 啊 我在找你啊 ...");
+	}
+}
