Java责任链设计模式

package com.test.demo; 
public abstract class Leader { 
protected Leader nextHandler;//上一级领导 
public final void handlerRequest(int money){ 
if(money<=limit() ){//小于限制，可以批复 
handler(money); 
}else{ 
if(nextHandler!=null){ 
nextHandler.handlerRequest(money);//交给上一级领导处理 
} 
} 
} 
/* 
* 批款限额 
*/ 
public abstract int limit(); 
/* 
* 批款 
*/ 
public abstract void handler(int money); 
}

package com.test.demo; 
public class GroupLeader extends Leader { 
public int limit() { 
return 1000;//说明小组长有1000元的批复权限 
} 
public void handler(int money) { 
System.out.println("小组长批复了"+money); 
} 
}

package com.test.demo; 
public class Director extends Leader { 
@Override 
public int limit() { 
return 5000; 
} 
@Override 
public void handler(int money) { 
System.out.println("主管批复了"+money); 
} 
}

package com.test.demo; 
public class Manager extends Leader { 
@Override 
public int limit() { 
return 10000; 
} 
@Override 
public void handler(int money) { 
System.out.println("经理批复了"+money); 
} 
}

package com.test.demo; 
public class CEO extends Leader { 
@Override 
public int limit() { 
return Integer.MAX_VALUE; 
} 
@Override 
public void handler(int money) { 
System.out.println("CEO批复了"+money); 
} 
}

package com.test.demo; 
public class XiaoZhang { 
public static void main(String[] args) { 
GroupLeader groupLeader=new GroupLeader(); 
Director director=new Director(); 
Manager manager=new Manager(); 
CEO ceo=new CEO(); 
groupLeader.nextHandler=director; 
director.nextHandler=manager; 
manager.nextHandler=ceo; 
groupLeader.handlerRequest(50000); 
groupLeader.handlerRequest(500); 
groupLeader.handlerRequest(5000); 
} 
}