架构师训练营第 3 周 _ 课后作业

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发布于: 2020 年 06 月 21 日
作业一：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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下图是我最常用的单例实现方式（使用C#）。手写代码果然懵逼。
作业二：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。
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下面是用C#代码实现的
public abstract class Control
{
    public List<Control> Children { get; set; }
    public String DataTemplate { get; set; }
    public Control()
    {
        Children = new List<Control>();
        DataTemplate = "";
    }
    public virtual void Draw()
    {
        this.OnDraw();
        foreach (var e in Children)
        {
            e.Draw();
        }
    }
    protected abstract void OnDraw();
}
public class WinForm : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "WinForm", DataTemplate));
    }
}
public class Picture : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "Picture", DataTemplate));
    }
}
public class Button : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "Button", DataTemplate));
    }
}
public class Frame : Control {
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "Frame", DataTemplate));
    }
}
public class Label : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "Label", DataTemplate));
    }
}
public class TextBox : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "TextBox", DataTemplate));
    }
}
public class PasswordBox : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "PasswordBox", DataTemplate));
    }
}
public class CheckBox : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "CheckBox", DataTemplate));
    }
}
public class LinkLabel : Control
{
    protected override void OnDraw()
    {
        Console.WriteLine(String.Format("print {0} ({1})", "LinkLabel", DataTemplate));
    }
}
组合对象应用场景
class Program
{
    static void Main(string[] args)
    {
        var wnd = new WinForm()
        {
            DataTemplate = "WINDOW窗口"
        };
        var picLogo = new Picture
        {
            DataTemplate = "LOGO图片"
        };
        wnd.Children.Add(picLogo);
        var btnLogin = new Button
        {
            DataTemplate = "登录"
        };
        wnd.Children.Add(btnLogin);
        var btnReg = new Button()
        {
            DataTemplate = "注册"
        };
        wnd.Children.Add(btnReg);
        var frame1 = new Frame()
        {
            DataTemplate = "FRAME1"
        };
        var labelUserName = new Label()
        {
            DataTemplate = "用户名"
        };
        frame1.Children.Add(labelUserName);
        var tbUserName = new TextBox()
        {
            DataTemplate = "文本框"
        };
        frame1.Children.Add(tbUserName);
        var labelPassword = new Label()
        {
            DataTemplate = "密码"
        };
        frame1.Children.Add(labelPassword);
        var pbPassword = new PasswordBox()
        {
            DataTemplate = "密码框"
        };
        frame1.Children.Add(pbPassword);
        var cblabelRememberUserName = new CheckBox()
        {
            DataTemplate = "复选框"
        };
        frame1.Children.Add(cblabelRememberUserName);
        var labelRememberUserName = new Label()
        {
            DataTemplate = "记住用户名"
        };
        frame1.Children.Add(labelRememberUserName);
        var forgetPassword = new LinkLabel()
        {
            DataTemplate = "忘记密码"
        };
        frame1.Children.Add(forgetPassword);
        wnd.Children.Add(frame1);
        wnd.Draw();
        Console.ReadKey();
    }
}
输出结果
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