Java 设计模式之责任链模式-优快云博客

本文链接：https://blog.youkuaiyun.com/verejava/article/details/80673583

本文通过一个员工离职审批流程的例子，详细介绍了责任链设计模式的具体实现。该模式允许请求沿着处理者链传递，直到有一个处理者处理它为止。文章展示了如何通过Java编程语言实现这一模式，包括各个处理节点的具体职责划分。

http://www.verejava.com/?id=16999052620463

ackage com.chain.theory;

public class TestHandler
{
	public static void main(String[] args)
	{
		Handler hrHandler=new HrHandler(null);
		Handler managerHandler=new ManagerHandler(hrHandler);
		Handler financeHandler=new FinanceHandler(managerHandler);
		Handler frontHandler=new FrontHandler(financeHandler);
		
		frontHandler.handleRequest("离职");
	}
}





package com.chain.theory;

public class ManagerHandler implements Handler
{
	private Handler nextHandler;
	
	public ManagerHandler(Handler nextHandler)
	{
		this.nextHandler=nextHandler;
	}
	

	@Override
	public void handleRequest(String request)
	{
		if("审批".equals(request))
		{
			System.out.println("经理审核完毕");
			if(nextHandler!=null)
				nextHandler.handleRequest("批准");
		}
		
	}

}





package com.chain.theory;

public class HrHandler implements Handler
{
	private Handler nextHandler;
	
	public HrHandler(Handler nextHandler)
	{
		this.nextHandler=nextHandler;
	}
	

	@Override
	public void handleRequest(String request)
	{
		if("批准".equals(request))
		{
			System.out.println("人事批准");
			if(nextHandler!=null)
				nextHandler.handleRequest("完毕");
		}
		
	}

}





package com.chain.theory;

public interface Handler
{
	public void handleRequest(String request);
}





package com.chain.theory;

public class FrontHandler implements Handler
{
	private Handler nextHandler;
	
	public FrontHandler(Handler nextHandler)
	{
		this.nextHandler=nextHandler;
	}
	

	@Override
	public void handleRequest(String request)
	{
		if("离职".equals(request))
		{
			System.out.println("离职申请");
			if(nextHandler!=null)
				nextHandler.handleRequest("审核");
		}
		
	}

}





package com.chain.theory;

public class FinanceHandler implements Handler
{
	private Handler nextHandler;
	
	public FinanceHandler(Handler nextHandler)
	{
		this.nextHandler=nextHandler;
	}
	

	@Override
	public void handleRequest(String request)
	{
		if("审核".equals(request))
		{
			System.out.println("财务审核完毕");
			if(nextHandler!=null)
				nextHandler.handleRequest("审批");
		}
		
	}

}

http://www.verejava.com/?id=16999052620463