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liukai · �� 2025-12-5 14:28:20

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public interface GrainDefense {
void defend(int troops);
void setNextDefense(GrainDefense next);
}

public class FirstLineDefense implements GrainDefense {
private GrainDefense next;
@Override
public void defend(int troops) {
      if (troops > 30000) {
         System.out.println("��һ��ߣ��ٻ��");
      } else if (next != null) {
         next.defend(troops);
      }
}
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}
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public abstract class IntelligenceChain {
protected IntelligenceChain next;
public void setNext(IntelligenceChain next) {
      this.next = next;
}
public abstract void process(String message);
}

public class LocalSpy extends IntelligenceChain {
@Override
public void process(String message) {
      if (message.contains("�ܾ�ˮկ")) {
         System.out.println("��̽��ȷ��ˮկλ��");
      } else if (next != null) {
         next.process(message);
      }
}
}
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public abstract class ApprovalHandler {
protected ApprovalHandler nextHandler;

public void setNextHandler(ApprovalHandler next) {
      this.nextHandler = next;
}

public abstract void handleRequest(ApprovalRequest request);
}

public class DepartmentHead extends ApprovalHandler {
@Override
public void handleRequest(ApprovalRequest request) {
      if (request.getAmount()
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public class ApprovalChainDemo {
public static void main(String[] args) {
      ApprovalHandler deptHead = new DepartmentHead();
      ApprovalHandler vp = new VicePresident();
      ApprovalHandler ceo = new CEO();

      deptHead.setNextHandler(vp);
      vp.setNextHandler(ceo);

      ApprovalRequest req1 = new ApprovalRequest(3000);
      deptHead.handleRequest(req1); // ��ž��

      ApprovalRequest req2 = new ApprovalRequest(15000);
      deptHead.handleRequest(req2); // ��ܲ�
}
}
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public class HandlerFactory {
public static ApprovalHandler createChain() {
      ApprovalHandler dept = new DepartmentHead();
      ApprovalHandler vp = new VicePresident();
      ApprovalHandler ceo = new CEO();

      dept.setNextHandler(vp);
      vp.setNextHandler(ceo);
      return dept;
}
}
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public abstract class ZuulFilter {
private ZuulFilter next;
public abstract int filterOrder();
public abstract boolean shouldFilter();
public abstract Object run() throws ZuulException;

public Object process(RequestContext ctx) {
      if (shouldFilter()) {
         return run();
      }
      if (next != null) {
         return next.process(ctx);
      }
      return null;
}
}
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public interface ConsumeChain {
ConsumeResult consume(MessageExt msg);
void setNext(ConsumeChain next);
}

public class DeserializeChain implements ConsumeChain {
private ConsumeChain next;
@Override
public ConsumeResult consume(MessageExt msg) {
      // ��л��߼�
      if (next != null) return next.consume(msg);
      return ConsumeResult.SUCCESS;
}
}
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public class CircularChain {
private List handlers;
private int currentIndex = 0;

public void process(Request request) {
      if (handlers.isEmpty()) return;
      handlers.get(currentIndex % handlers.size()).handle(request);
      currentIndex++;
}
}
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public class ConditionalChain {
private List, Handler>> conditions;

public void addCondition(Predicate pred, Handler handler) {
      conditions.add(new Pair(pred, handler));
}

public void process(Request req) {
      conditions.stream()
         .filter(p -> p.getKey().test(req))
         .findFirst()
         .ifPresent(p -> p.getValue().handle(req));
}
}
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