大三打卡（10.25）

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。

实验要求：

1.     提交类图；

 

2.     提交源代码；

package RJSJ.test15;

 

public class DepartmentManager extends Leader{

    public DepartmentManager(String name) {

        super(name);

    }

 

    @Override

    public void handleRequest(PurchaseRequest purchaseRequest) {

        if (purchaseRequest.getPrice() > 10000 && purchaseRequest.getPrice() <= 50000) {

            System.out.println("请求采购单:" + purchaseRequest.getName() + "被" + this.name + "审批");

        } else {

            if(this.successor != null){

                this.successor.handleRequest(purchaseRequest);

            }

 

        }

    }

}

package RJSJ.test15;

 

public class DeputyManager extends Leader{

    public DeputyManager(String name) {

        super(name);

    }

 

    @Override

    public void handleRequest(PurchaseRequest purchaseRequest) {

        if (purchaseRequest.getPrice() > 50000 && purchaseRequest.getPrice() <= 100000) {

            System.out.println("请求采购单:" + purchaseRequest.getName() + "被" + this.name + "审批");

        } else {

            if(this.successor != null){

                this.successor.handleRequest(purchaseRequest);

            }

 

        }

    }

}

package RJSJ.test15;

 

public class Director extends Leader{

    public Director(String name) {

        super(name);

    }

 

    @Override

    public void handleRequest(PurchaseRequest purchaseRequest) {

        if (purchaseRequest.getPrice() <= 10000) {

            System.out.println("请求采购单:" + purchaseRequest.getName() + "被" + this.name + "审批");

        } else {

            if(this.successor != null){

                this.successor.handleRequest(purchaseRequest);

            }

 

        }

    }

}

package RJSJ.test15;

 

public class GeneralManager extends Leader{

    public GeneralManager(String name) {

        super(name);

    }

 

    @Override

    public void handleRequest(PurchaseRequest purchaseRequest) {

        if (purchaseRequest.getPrice() <= 200000) {

            System.out.println("请求采购单:" + purchaseRequest.getName() + "被" + this.name + "审批");

        } else {

            System.out.println("请求采购单:" + purchaseRequest.getName() + "需要开大会审批");

 

        }

    }

}

package RJSJ.test15;

 

public  abstract class Leader {

 

    String name;

 

    Leader successor;

 

    public Leader(String name) {

        this.name = name;

    }

 

 

 

    public void setSuccessor(Leader successor) {

        this.successor = successor;

    }

 

 

    public abstract void handleRequest(PurchaseRequest purchaseRequest);

}

package RJSJ.test15;

 

public class Main {

    public static void main(String[] args) {

        Leader director = new Director("director");

        Leader departmentManager = new DepartmentManager("departmentManager");

        Leader deputyManager = new DeputyManager("deputyManager");

        Leader generalManager = new GeneralManager("generalManager");

        director.setSuccessor(departmentManager);

        departmentManager.setSuccessor(deputyManager);

        deputyManager.setSuccessor(generalManager);

 

        PurchaseRequest purchaseRequest1 = new PurchaseRequest("product1", 10000);

        director.handleRequest(purchaseRequest1);

        PurchaseRequest purchaseRequest2 = new PurchaseRequest("product2", 50000);

        director.handleRequest(purchaseRequest2);

        PurchaseRequest purchaseRequest3 = new PurchaseRequest("product3", 100000);

        director.handleRequest(purchaseRequest3);

        PurchaseRequest purchaseRequest4 = new PurchaseRequest("product4", 200000);

        director.handleRequest(purchaseRequest4);

        PurchaseRequest purchaseRequest5 = new PurchaseRequest("product5", 300000);

        director.handleRequest(purchaseRequest5);

    }

}

package RJSJ.test15;

 

public class PurchaseRequest {

    private float price;

    private String name;

 

    public PurchaseRequest(String name, float price) {

        this.name = name;

        this.price = price;

    }

 

 

    public float getPrice() {

        return price;

    }

 

    public void setPrice(float price) {

        this.price = price;

    }

 

    public String getName() {

        return name;

    }

 

    public void setName(String name) {

        this.name = name;

    }

}