今天来讲一个悲伤的故事，关于小明找小红的故事。加班狗小明某日不用加班，开开心心把家还，结果妻子小红不在家，发生了下面的一幕：
上代码。首先定义好小红
public interface Lover { }小红：
public class WifeHong implements Lover { public WifeHong(Affairs affairs) { System.out.println("我是小红，去" + affairs.name + "家。"); affairs.setLover(this); } }处理请求抽象类：
public abstract class Affairs { protected Affairs nextOne; protected String name; protected Lover lover; protected Affairs(String name) { this.name = name; } public abstract void handleRequest(Lover lover); public void setLover(Lover lover) { this.lover = lover; } public void setNextOne(Affairs nextOne) { this.nextOne = nextOne; } public Affairs getNextOne() { return nextOne; } }具体处理请求类：
public class OldMan extends Affairs { public OldMan(String name) { super(name); } @Override public void handleRequest(Lover _lover) { System.out.println("=============================="); System.out.println("咚咚咚... " + name + " ,我来找小红。"); if (lover == null) System.out.println("[" + name + "]我不认识，走开。"); else if (lover.equals(_lover)) System.out.println("[" + name + "]pia pia pia..."); if (nextOne == null) System.out.println("[" + name + "]回家吧，小明，听大哥的话。"); else { System.out.println("[" + name + "]去别人家找去，跟我没关系。"); nextOne.handleRequest(_lover); } } }请求者小明：
public class XiaoMing { public static void main(String[] args) { OldMan oldLi = new OldMan("老李"); OldMan oldZhou = new OldMan("老周"); OldMan oldWang = new OldMan("老王"); Lover xiaoHong = new WifeHong(oldWang); oldLi.setNextOne(oldZhou); oldZhou.setNextOne(oldWang); oldLi.handleRequest(xiaoHong); } }执行结果，真相大白：
后话：关于责任链，就在于这个handleRequest方法，其他东西都是情节需要，自行演绎。（^_^）
