职责链模式--Java实现

相关类图

具体代码

//BuyObject.java
package org.example.test014;

public class BuyObject {
    public int getMoney() {
        return money;
    }

    public void setMoney(int money) {
        this.money = money;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public BuyObject(int id, int money) {
        this.id = id;
        this.money = money;
    }

    private int id;
    private int money;


}

//Leader.java
package org.example.test014;

public abstract class Leader {
    protected String name;

    public Leader getSuccessor() {
        return successor;
    }

    public void setSuccessor(Leader successor) {
        this.successor = successor;
    }

    protected Leader successor;

    public Leader(String name) {
        this.name = name;
    }

    public abstract void handleBuy(BuyObject buyObject);//管理采购单的函数方法
}

//Zhuren.java
package org.example.test014;

public class Zhuren extends Leader {
    public Zhuren(String name) {
        super(name);
    }

    @Override
        public void handleBuy(BuyObject buyObject) {
        if (buyObject.getMoney() < 10000) {
            System.out.println("主任" + name + "审批采购单号" + buyObject.getId() + ",，共计" + buyObject.getMoney() + "元");
        }
        else {
            if (this.successor != null) {
                this.successor.handleBuy(buyObject);
            }
        }
    }
}

//Bumen.java
package org.example.test014;

public class Bumen extends Leader {
    public Bumen(String name) {
        super(name);
    }

    @Override
        public void handleBuy(BuyObject buyObject) {
        if (buyObject.getMoney() >= 10000 && buyObject.getMoney() < 50000) {
            System.out.println("部门经理" + name + "审批采购单号" + buyObject.getId() + ",，共计" + buyObject.getMoney() + "元");
        }
        else {
            if (this.successor != null) {
                this.successor.handleBuy(buyObject);
            }
        }
    }
}

//Fuzong.java
package org.example.test014;

public class Fuzong extends Leader {
    public Fuzong(String name) {
        super(name);
    }

    @Override
        public void handleBuy(BuyObject buyObject) {
        if (buyObject.getMoney() >= 50000 && buyObject.getMoney() < 100000) {
            System.out.println("副总经理" + name + "审批采购单号" + buyObject.getId() + ",，共计" + buyObject.getMoney() + "元");
        }
        else {
            if (this.successor != null) {
                this.successor.handleBuy(buyObject);
            }
        }
    }
}

//Zong.java
package org.example.test014;

public class Zong extends Leader {
    public Zong(String name) {
        super(name);
    }

    @Override
        public void handleBuy(BuyObject buyObject) {
        if (buyObject.getMoney() >= 100000 && buyObject.getMoney() < 200000) {
            System.out.println("总经理" + name + "审批采购单号" + buyObject.getId() + ",，共计" + buyObject.getMoney() + "元");
        }
        else {
            System.out.println("金额太高，打算开职工大会商量这件事~");
        }
    }
}

//Client.java
package org.example.test014;

public class Client {
    public static void main(String[] args) {
        Leader objZhuren, objBumen, objFuzong, objZong;

        objZhuren = new Zhuren("王明");
        objBumen = new Bumen("赵强");
        objFuzong = new Fuzong("李波");
        objZong = new Zong("李甜甜");

        objZhuren.setSuccessor(objBumen);
        objBumen.setSuccessor(objFuzong);
        objFuzong.setSuccessor(objZong);

        BuyObject b1 = new BuyObject(1, 3000);
        objZhuren.handleBuy(b1);

        BuyObject b2 = new BuyObject(2, 40000);
        objZhuren.handleBuy(b2);

        BuyObject b3 = new BuyObject(3, 70000);
        objZhuren.handleBuy(b3);

        BuyObject b4 = new BuyObject(4, 160000);
        objZhuren.handleBuy(b4);

        BuyObject b5 = new BuyObject(5, 230000);
        objZhuren.handleBuy(b5);

    }
}

运行结果