架构师训练营 - 作业 - 第三周

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发布于: 2020 年 10 月 03 日

1. 在草稿纸上手写一个单例模式的实现代码，拍照提交使用DCL实现单例
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2、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
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组合模式中，Componet、Composite、Leaf各角色如下：
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Component角色
public abstract class AbstractFrameComponet {
	private String type;
	private String caption;
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
	public String getCaption() {
		return caption;
	}
	public void setCaption(String caption) {
		this.caption = caption;
	}
	
	public AbstractFrameComponet add(AbstractFrameComponet componet) {
		throw new UnsupportedOperationException("不支持该操作");
	}
	public abstract void printComponetInfo();
}
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Leaf角色
public class ConcreteFrameComponent extends AbstractFrameComponet {
	
	public ConcreteFrameComponent(String type, String caption) {
		setType(type);
		setCaption(caption);
	}
	
	@Override
	public void printComponetInfo() {
		System.out.println("print " + getType() + "(" + getCaption() + ")");
	}
	
}
 class Label extends ConcreteFrameComponent {
	public Label(String caption) {   super("Label", caption);  }
}
class TextBox extends ConcreteFrameComponent {
	public TextBox(String caption) { super("TextBox", caption); }
}
class PasswordBox extends ConcreteFrameComponent {
	public PasswordBox(String caption) { super("PasswordBox", caption); }
}
class CheckBox extends ConcreteFrameComponent {
	public CheckBox(String caption) { super("CheckBox", caption); }
}
class LinkLabel extends ConcreteFrameComponent {
	public LinkLabel(String caption) { super("LinkLabel", caption); }
}
class Picture extends ConcreteFrameComponent {
	public Picture(String caption) { super("Picture", caption); }
}
class Button extends ConcreteFrameComponent {
	public Button(String caption) { super("Button", caption); }
}
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Composite角色
public class ConcreteFrameContainer extends AbstractFrameComponet {
	
	protected ArrayList<AbstractFrameComponet> childComponetList = new ArrayList<>();
	
	public ConcreteFrameContainer(String type, String caption) {
		setType(type);
		setCaption(caption);
	}
	
	@Override
	public void printComponetInfo() {
		System.out.println("print " + getType() + "(" + getCaption() + ")");
		
		childComponetList.stream().forEach(AbstractFrameComponet::printComponetInfo);
	}
	
	@Override
	public AbstractFrameComponet add(AbstractFrameComponet componet) {
		childComponetList.add(componet);
		return this;
	}
}
class Frame extends ConcreteFrameContainer {
	public Frame(String caption) { super("Frame", caption); }
}
class WinForm extends ConcreteFrameContainer {
	public WinForm(String caption) { super("WinForm", caption); }
}
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Client
public class Client {
	public static void main(String[] args) {
        Frame frame = new Frame("FRAME1");
        frame.add(new Label("用户名"))
            .add(new TextBox("文本框"))
            .add(new Label("密码"))
            .add(new PasswordBox("密码框"))
            .add(new CheckBox("复选框"))
            .add(new TextBox("记住用户名"))
            .add(new LinkLabel("忘记密码"));
        
        WinForm winForm = new WinForm("WINDOWS窗口");
        winForm.add(new Picture("LOGO图片"))
               .add(new Button("登录"))
               .add(new Button("注册"))
               .add(frame);
            
        winForm.printComponetInfo();		
	}
}
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