1、問題描述

小明所在的公司請(qǐng)假需要在OA系統(tǒng)上發(fā)布申請(qǐng)，整個(gè)請(qǐng)求流程包括多個(gè)處理者，每個(gè)處理者負(fù)責(zé)處理不同范圍的請(qǐng)假天數(shù)，如果一個(gè)處理者不能處理請(qǐng)求，就會(huì)將請(qǐng)求傳遞給下一個(gè)處理者，請(qǐng)你實(shí)現(xiàn)責(zé)任鏈模式，可以根據(jù)請(qǐng)求天數(shù)找到對(duì)應(yīng)的處理者。
審批責(zé)任鏈由主管(Supervisor), 經(jīng)理(Manager)和董事（Director)組成，他們分別能夠處理3天、7天和10天的請(qǐng)假天數(shù)。如果超過10天，則進(jìn)行否決。

輸入示例
4
Alice 2
Bob 5
Tom 10
Jerry 12

輸出示例
Alice Approved by Supervisor.
Bob Approved by Manager.
Tom Approved by Director.
Jerry Denied by Director.

2、責(zé)任鏈模式

其實(shí)就是單鏈表數(shù)據(jù)結(jié)構(gòu)，一個(gè)個(gè)遞歸向后處理，當(dāng)前節(jié)點(diǎn)能處理就返回
文章來源地址http://www.zghlxwxcb.cn/news/detail-859350.html

3、代碼

import com.sun.java.accessibility.util.TopLevelWindowListener;

import java.util.*;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        Supervisor s=new Supervisor();

        Manager m=new Manager();

        Director d=new Director();

        s.setNext(m);
        m.setNext(d);
        int number=Integer.parseInt(sc.nextLine());
        for(int i=0;i<number;i++){
            String input=sc.nextLine();
            String[] ss=input.split(" ");
            String username=ss[0];
            int day=Integer.parseInt(ss[1]);
            s.handleRequest(username,day);
        }



    }
}

interface Handler{
    void setNext(Handler next);
    Handler getNext();
    void handleRequest(String username,int time);
    boolean canHandleRequest(int time);
}

class Supervisor implements Handler{
    private  Handler next;
    @Override
    public void setNext(Handler next) {
        this.next=next;
    }

    @Override
    public Handler getNext() {
        return this.next;
    }

    @Override
    public void handleRequest(String username,int time) {
        if(canHandleRequest(time)){
            System.out.println(username+" Approved by Supervisor.");
        }else {
            Handler next=getNext();
            next.handleRequest(username,time);
        }
    }

    @Override
    public boolean canHandleRequest(int time) {
        if(time>3){
            return false;
        }
        return true;
    }
}

class Manager implements Handler{
    private  Handler next;
    @Override
    public void setNext(Handler next) {
        this.next=next;
    }

    @Override
    public Handler getNext() {
        return this.next;
    }

    @Override
    public void handleRequest(String username, int time) {
        if(canHandleRequest(time)){
            System.out.println(username+" Approved by Manager.");
        }else {
            Handler next=getNext();
            next.handleRequest(username,time);
        }
    }

    @Override
    public boolean canHandleRequest(int time) {
        if(time>5){
            return false;
        }
        return true;
    }
}


class Director implements Handler{
    private  Handler next;
    @Override
    public void setNext(Handler next) {
        this.next=next;
    }

    @Override
    public Handler getNext() {
        return this.next;
    }

    @Override
    public void handleRequest(String username, int time) {
        if(canHandleRequest(time)){
            System.out.println(username+" Approved by Director.");
        }else {
            System.out.println(username+" Denied by Director.");
        }
    }

    @Override
    public boolean canHandleRequest(int time) {
        if(time>10){
            return false;
        }
        return true;
    }
}

到了這里，關(guān)于設(shè)計(jì)模式代碼實(shí)戰(zhàn)-責(zé)任鏈模式的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！