【架构师训练营 - 作业 -3】组合模式

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发布于: 2020 年 06 月 22 日

1. 请在草稿纸上手写一个单例模式的实现代码，拍照提交作业。
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2. 请用组合设计模式编写程序，打印输出图 1 的窗口，窗口组件的树结构如图 2 所示，打印输出示例参考图 3。窗口
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组件抽象接口、以及为了方便而写的公共基类:
public interface Component {
    void print();
    String name();
}
public abstract class BaseComponent implements Component {
    private String name;
    public BaseComponent(String name) {
        this.name = name;
    }
    @Override
    public void print() {
        System.out.println("print " + this.getClass().getSimpleName() +"(" + name() +
                ")");
    }
    @Override
    public String name() {
        return name;
    }
}
具备装载组件的容器
public abstract class Container extends BaseComponent {
    private List<Component> childs;
    public Container(String name) {
        super(name);
        childs = new LinkedList<>();
    }
    public Container addChild(Component component) {
        childs.add(component);
        return this;
    }
    @Override
    public void print() {
        super.print();
        childs.forEach(Component::print);
    }
}
各个组件：
public class Button extends BaseComponent {
    public Button(String name) {
        super(name);
    }
}
public class CheckBox extends BaseComponent {
    public CheckBox(String name) {
        super(name);
    }
}
public class Lable extends BaseComponent {
    public Lable(String name) {
        super(name);
    }
}
public class LinkLable extends BaseComponent {
    public LinkLable(String name) {
        super(name);
    }
}
public class PasswordBox extends BaseComponent {
    public PasswordBox(String name) {
        super(name);
    }
}
public class Picture extends BaseComponent {
    public Picture(String name) {
        super(name);
    }
}
public class TextBox extends BaseComponent {
    public TextBox(String name) {
        super(name);
    }
}
容器：
public class Frame extends Container {
    public Frame(String name) {
        super(name);
    }
}
public class WinForm extends Container {
    public WinForm(String name) {
        super(name);
    }
}
启动类：
public class Browser {
    public static void main(String[] args) {
        Frame frame = new Frame("FRAME1");
                frame.addChild(new Lable("用户名"))
                .addChild(new TextBox("文本框")).addChild(new Lable("密码"))
                .addChild(new PasswordBox("密码框")).addChild(new CheckBox("复选框"))
                .addChild(new TextBox("记住用户名")).addChild(new LinkLable("忘记密码"));
        WinForm winForm = new WinForm("WINDOW窗口");
        winForm.addChild(new Picture("LOGO图片")).addChild(new Button("登录"))
                .addChild(new Button("注册")).addChild(frame);
        winForm.print();
    }
}
输出：
print WinForm(WINDOW窗口)
print Picture(LOGO图片)
print Button(登录)
print Button(注册)
print Frame(FRAME1)
print Lable(用户名)
print TextBox(文本框)
print Lable(密码)
print PasswordBox(密码框)
print CheckBox(复选框)
print TextBox(记住用户名)
print LinkLable(忘记密码)
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