2023/10/20 每日总结

今天完成了设计模式实验15

实验15：职责链模式

本次实验属于模仿型实验，通过本次实验学生将掌握以下内容： 

1、理解职责链模式的动机，掌握该模式的结构；

2、能够利用职责链模式解决实际问题。

 

[实验任务一]：财务审批

某物资管理系统中物资采购需要分级审批，主任可以审批1万元及以下的采购单，部门经理可以审批5万元及以下的采购单，副总经理可以审批10万元及以下的采购单，总经理可以审批20万元及以下的采购单，20万元以上的采购单需要开职工大会确定。现用职责链模式设计该系统。

类图

 

 源代码

package org.test15;

public abstract class Leader {
    protected String name;
    protected Leader successor;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    public void setSuccessor(Leader successor) {
        this.successor = successor;
    }
    public abstract void handleRequest(PurchaseOrder purchaseOrder);
}




package org.test15;

public class Asembly extends Leader{
    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {
        if(purchaseOrder.getPrice()>200000){
            System.out.println("员工大会已经处理了该订单,该订单金额是"+purchaseOrder.getPrice());

        }
    }
}



package org.test15;

public class Chief extends Leader{
    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {
        if(purchaseOrder.getPrice()<=10000){
            System.out.println("主任已经处理了该订单,该订单金额是"+purchaseOrder.getPrice());

        }else {
            System.out.println("主任权限不足,已移交部门经理处理");
            this.successor.handleRequest(purchaseOrder);
        }
    }
}




package org.test15;

public class DepartManager extends Leader{
    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {
        if(purchaseOrder.getPrice()<=50000&&purchaseOrder.getPrice()>10000){
            System.out.println("部门经理已经处理了该订单,该订单金额是"+purchaseOrder.getPrice());

        }else {
            System.out.println("部门经理权限不足,已移交副经理处理");
            this.successor.handleRequest(purchaseOrder);
        }
    }
}




package org.test15;

public class Manager extends Leader{
    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {
        if(purchaseOrder.getPrice()<=200000&&purchaseOrder.getPrice()>100000){
            System.out.println("总经理已经处理了该订单,该订单金额是"+purchaseOrder.getPrice());

        }else {
            System.out.println("总经理权限不足,已移交员工大会处理");
            this.successor.handleRequest(purchaseOrder);
        }
    }
}





package org.test15;

public class PurchaseOrder extends Leader{
    private double price;

    public PurchaseOrder(double price) {
        this.price = price;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {

    }
}





package org.test15;

public class ViceManager extends Leader{
    @Override
    public void handleRequest(PurchaseOrder purchaseOrder) {
        if(purchaseOrder.getPrice()<=100000&&purchaseOrder.getPrice()>50000){
            System.out.println("副总经理已经处理了该订单,该订单金额是"+purchaseOrder.getPrice());

        }else {
            System.out.println("副经理权限不足,已移交总经理处理");
            this.successor.handleRequest(purchaseOrder);
        }
    }
}




package org.test15;

public class Client {
    public static void main(String[] args) {
        PurchaseOrder purchaseOrder = new PurchaseOrder(2000000);
        Leader leader1=new Chief();
        Leader leader2=new DepartManager();
        Leader leader3=new ViceManager();
        Leader leader4=new Manager();
        Leader leader5=new Asembly();
        leader1.setSuccessor(leader2);
        leader2.setSuccessor(leader3);
        leader3.setSuccessor(leader4);
        leader4.setSuccessor(leader5);
        leader1.handleRequest(purchaseOrder);
    }
}