《有些模式》- 责任链(简单模拟1)

package com.macrotea.responzchain.interfazz;

public interface Filter {
 public String doFilter(String text);
}

package com.macrotea.responzchain.impl;

import com.macrotea.responzchain.interfazz.Filter;

public class HTMLFilter implements Filter {

	@Override
	public String doFilter(String text) {
		String retVal = null;
		retVal = text.replaceAll("<[^>]+>", "");
		return retVal;
	}

}

 

 

package com.macrotea.responzchain.impl;

import com.macrotea.responzchain.interfazz.Filter;

public class HarmonyFilter implements Filter {
	private static final String[] disHarmonyWords = { "大乡里", "犀利哥", "奔跑哥" };

	@Override
	public String doFilter(String text) {
		String retVal = text;
		for (String word : disHarmonyWords) {
			retVal=retVal.replaceAll(word, "*");
		}
		return retVal;
	}

}

package com.macrotea.responzchain.chain;

import java.util.ArrayList;
import java.util.List;

import com.macrotea.responzchain.interfazz.Filter;

public class FilterChain {
	private List<Filter> filters;

	public FilterChain() {
		super();
		filters = new ArrayList<Filter>();
	}

	public FilterChain appendFilter(Filter filter) {
		filters.add(filter);
		return this;
	}

	public FilterChain removeFilter(Filter filter) {
		filters.remove(filter);
		return this;
	}

	public String executeChain(String text) {
		String retVal = text;
		for (Filter filter : filters) {
			retVal = filter.doFilter(retVal);
		}
		return retVal;
	}
}

package com.macrotea.responzchain.interfazz;

public interface Handler {
	public String doHandle(String text);
}

 

 

package com.macrotea.responzchain.handler;

import com.macrotea.responzchain.chain.FilterChain;
import com.macrotea.responzchain.interfazz.Handler;

public class MessageHandler implements Handler{

	private FilterChain filterChain;
	
	public FilterChain getFilterChain() {
		return filterChain;
	}

	public void setFilterChain(FilterChain filterChain) {
		this.filterChain = filterChain;
	}

	public MessageHandler(FilterChain filterChain) {
		super();
		this.filterChain = filterChain;
	}

	@Override
	public String doHandle(String text) {
		return filterChain.executeChain(text);
	}

}

 

 

package com.macrotea.responzchain.test;

import com.macrotea.responzchain.chain.FilterChain;
import com.macrotea.responzchain.handler.MessageHandler;
import com.macrotea.responzchain.impl.HTMLFilter;
import com.macrotea.responzchain.impl.HarmonyFilter;

public class Mainer {
	public static void main(String[] args) {
		  String netText="<h1>哈哈</h1>我来到一个神奇的地方,这里有犀利哥,有大乡里,有奔跑哥,什么都有!";
		
		/*构造过滤器链*/
		FilterChain chain=new FilterChain();
		chain.appendFilter(new HTMLFilter())
				.appendFilter(new HarmonyFilter());
		
		/*传递给信息处理者*/
		MessageHandler msgHandler =new MessageHandler(chain);
		String clearText=msgHandler.doHandle(netText);
		System.out.println(clearText);
		
	}

}

  

 

简单责任链设计模式!!