每天一设计模式之代理模式

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每天一设计模式之代理模式

代理模式:为其他对象提供一种代理以控制对这个对象的访问.

代理模式结构图:

代码来源:大话设计模式

代码样例:送MM礼物

 

SchoolGirl:

package test;

public class SchoolGirl {
    private String name;

    public String getName() {
        return name;
    }

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

}

送礼物:

package test;

public interface GiveGift {
    void GiveDolls();
    void GiveFlowers();
    void GiveChocolate();
}

具体送礼物:

package test;

public class Pursuit implements GiveGift {

    private SchoolGirl mm;

    public Pursuit(SchoolGirl mm) {
        this.mm = mm;
    }

    public void GiveChocolate() {
        System.out.println(mm.getName() + "给你巧克力");

    }

    public void GiveDolls() {
        System.out.println(mm.getName() + "给你洋娃娃");

    }

    public void GiveFlowers() {
        System.out.println(mm.getName() + "给你鲜花");

    }

}

代理:

package test;

public class Proxy implements GiveGift {

    private Pursuit pursuit;

    public Proxy(SchoolGirl mm) {
        pursuit = new Pursuit(mm);
    }

    public void GiveChocolate() {
        pursuit.GiveChocolate();
    }

    public void GiveDolls() {
        pursuit.GiveDolls();
    }

    public void GiveFlowers() {
        pursuit.GiveFlowers();
    }

}

测试:

package test;

public class Test {
    public static void main(String[] args) {
        SchoolGirl mm = new SchoolGirl();
        mm.setName("小李");

        Proxy proxy = new Proxy(mm);
        proxy.GiveChocolate();
        proxy.GiveDolls();
        proxy.GiveFlowers();
    }
}