设计模式综合-会议管理系统的实现

(1)案例背景:

某会议管理系统的“会议通知发送”模块说明如下:

(1)行政管理人员可以给某个或者某些员工(Employee)发送会议通知,也可以给某个部门

(Department)发送通知,如果给某个部门发送通知,将逐个给该部门每个员工发送会议通知(2)如果员工或者部门希望能够收到会议通知,必须先注册到一个会议列表(MeetingList)中,在发送通知时,系统将遍历会议列表,逐个将会议通知发送给注册用户(User)

(2)实现步骤:

  • 根据题意,选用合适的两种设计模式
  • 根据这两种设计模式,画出本题的类图
  • 根据类图,实现“会议通知发送”模块的代码(附加题,会根据实现情况加平时成绩)
    • 设计模式的选用需要根据具体要求来进行
    • 多种设计模式可以进行混合使用

(4)案例总结:

Ø 混合使用时,需要根据选用的不同设计模式,对类图进行修改

两种模式:组合模式,观察者模式

 

 

代码结构:

 

 

详细代码:

MyElement.java:

package notice.Element;



public abstract class MyElement {

    public abstract void send();

}

 

 

 

Employee.java:

package notice.Element;



import notice.Observer.MyObserver;



public class Employee extends MyElement implements MyObserver {

    public void send(){

        System.out.println("发送文件给员工!");

    }

}

 

 


 

Department.java:

package notice.Element;



import notice.Observer.MyObserver;



import java.util.ArrayList;



public class Department extends MyElement implements MyObserver {

    private ArrayList list = new ArrayList();



    public void add(MyElement element){

        list.add(element);

    }



    public void remove(MyElement element){

        list.remove(element);

    }



    public void send(){

        for (Object object:list){

            ( (MyElement)object ).send();

        }

    }

}

 

 


 

MySubject.java:
package notice.Observer;



import java.util.ArrayList;



public abstract class MySubject {

    public ArrayList meetingList = new ArrayList();



    public void attach(MyObserver observer){

        meetingList.add(observer);

    }



    public void detach(MyObserver observer){

        meetingList.remove(observer);

    }



    public abstract void regist();

}

 

 

 

MyObserver.java:

package notice.Observer;



public interface MyObserver {

    void send();

}

 

 

 

User.java:

package notice.Observer;



import notice.Element.Department;

import notice.Element.Employee;

import notice.Element.MyElement;



public class User extends MySubject{

    public void regist(){

        MyElement emp1,emp2,emp3;

        Department dep1;



        emp1 = new Employee();

        emp2 = new Employee();

        emp3 = new Employee();

        dep1 = new Department();



        dep1.add(emp1);

        dep1.add(emp2);



        meetingList.add(emp3);

        meetingList.add(dep1);



        for (Object obs:meetingList){

            System.out.print("员工注册信息!     ");

            ((MyElement)obs).send();

        }

    }

}

 

 

 

Client.java:

package notice.Client;



import com.sun.org.apache.bcel.internal.generic.MONITORENTER;

import notice.Element.Department;

import notice.Element.Employee;

import notice.Element.MyElement;

import notice.Observer.MyObserver;

import notice.Observer.MySubject;

import notice.Observer.User;



public class Client {

    public static void main(String[] args) {

        System.out.println("软件1904班 白旭君 2019005368");



        MySubject subject = new User();



        MyObserver obs1,obs2;

        obs1 = new Employee();

        obs2 = new Department();



        subject.attach(obs1);

        subject.attach(obs2);



        subject.regist();

//        MyElement emp1,emp2,emp3;

//        Department dep1,dep2;

//

//        emp1 = new Employee();

//        emp2 = new Employee();

//        emp3 = new Employee();

//        dep1 = new Department();

//        dep2 = new Department();

//

//        dep1.add(emp1);

//        dep1.add(emp2);

//

//        dep2.add(dep1);

//        dep2.add(emp3);

//

//        dep2.send();



    }

}

 

 

实验结果:

 

 

 

 

 
posted @ 2022-04-23 17:30  临易  阅读(641)  评论(0编辑  收藏  举报