design pattern

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/adapter/Adaptee.java

+package com.whatsmars.tomcat.design.adapter;
+
+/**
+ * Created by shenhongxi on 16/4/14.
+ */
+public class Adaptee {
+
+    public void specificRequest() {
+        System.out.println("specific request");
+    }
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/adapter/Adapter.java

+package com.whatsmars.tomcat.design.adapter;
+
+/**
+ * Created by shenhongxi on 16/4/14.
+ */
+public class Adapter implements Target {
+
+    Adaptee adaptee;
+
+    public void request() {
+        adaptee.specificRequest();
+    }
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/adapter/Adapter2.java

+package com.whatsmars.tomcat.design.adapter;
+
+/**
+ * Created by shenhongxi on 16/4/14.
+ */
+public class Adapter2 extends Adaptee implements Target {
+    // 对于我们不必要实现的方法可在Adaptee中作空实现
+    public void request() {
+        super.specificRequest();
+    }
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/adapter/Target.java

+package com.whatsmars.tomcat.design.adapter;
+
+/**
+ * Created by shenhongxi on 16/4/14.
+ */
+public interface Target {
+
+    public void request();
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/HtmlFilter.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 具体装饰角色，增加过滤掉HTML标签的功能
+*/
+public class HtmlFilter extends MessageBoardDecorator {
+
+	public HtmlFilter(MessageBoardHandler handler) {
+		super(handler);
+	}
+	public String filter(String content) {
+	    String temp = super.filter(content);
+	    temp += "^^过滤掉HTML标签!^^";
+	    return temp;
+	   }
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/MessageBoard.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 用户留言板的具体实现
+*/
+public class MessageBoard implements MessageBoardHandler {
+
+	public String filter(String msg) {
+		return "留言板上的内容：" + msg;
+	}
+}
\ No newline at end of file

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/MessageBoardDecorator.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 装饰角色
+*/
+public class MessageBoardDecorator implements MessageBoardHandler {
+
+	private MessageBoardHandler handler;
+	 public MessageBoardDecorator(MessageBoardHandler handler) {
+	     super();
+	     this.handler = handler;
+	   }
+	 public String filter(String msg) {
+		 return handler.filter(msg);
+	   }
+}
\ No newline at end of file

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/MessageBoardHandler.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 用户留言板处理的接口
+*/
+public interface MessageBoardHandler {
+    /**
+	* @author javahongxi 用户可以利用函数留言
+	*/
+	public String filter(String msg);
+}

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/SensitiveFilter.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 具体装饰角色，增加过滤掉政治敏感字眼的功能
+*/
+public class SensitiveFilter extends MessageBoardDecorator {
+
+	public SensitiveFilter(MessageBoardHandler handler) {
+	    super(handler);
+	}
+	public String filter(String content) {
+		String temp = super.filter(content);
+	    temp += "^^过滤掉政治敏感的字眼!^^";
+	    return temp;
+	}
+}
\ No newline at end of file

whatsmars-tomcat/src/main/java/com/whatsmars/tomcat/design/decorator/Test.java

+package com.whatsmars.tomcat.design.decorator;
+
+/**
+* @author javahongxi 客户端测试
+*/
+public class Test {
+
+	public static void main(String[] args) {
+		MessageBoardHandler mb = new MessageBoard();
+		String content = mb.filter("一定要学好装饰模式！");
+		System.out.println(content);
+	      
+		mb = new HtmlFilter(new SensitiveFilter(new MessageBoard()));
+		content = mb.filter("一定要学好装饰模式！");
+		System.out.println(content);
+	}
+}