第三周作业

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发布于: 2020 年 06 月 22 日
作业一：1. 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 
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输出结果：
  +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)
执行方法：
public class Client {
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    public static void main(String[] args){
        Composite window = new Composite("print WinForm (WINDOW窗口)");
        Leaf picture = new Leaf("print Picture(Logo图片)");
        Leaf loginButton = new Leaf("print Button(登录)");
        Leaf registerButton = new Leaf("print Button(注册)");
        Composite fream1 = new Composite("print Frame(FRAME1)");
        Leaf userNameLable = new Leaf("print Lable(用户名)");
        Leaf textBox = new Leaf("print TextBox(文本框)");
        Leaf passwordLable = new Leaf("print Lable(密码)");
        Leaf passwordBox = new Leaf("print PasswordBox(密码框)");
        Leaf checkBox = new Leaf("print CheckBox(复选框)");
        Leaf rememberUserNametextBox = new Leaf("print TextBox(记住用户名)");
        Leaf forgetLinkLable = new Leaf("print LinkLable(忘记密码)");
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        window.addChild(picture);
        window.addChild(loginButton);
        window.addChild(registerButton);
        window.addChild(fream1);
        fream1.addChild(userNameLable);
        fream1.addChild(textBox);
        fream1.addChild(passwordLable);
        fream1.addChild(passwordBox);
        fream1.addChild(checkBox);
        fream1.addChild(rememberUserNametextBox);
        fream1.addChild(forgetLinkLable);
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        String prefix = "  ";
        window.printComponent(prefix);
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    }
}
组件的抽象接口
/**
 * 组件抽象类
 * @author: songdewei
 * @date: 2020/6/22
 */
public interface Component {
    /**
     * 打印组件信息
     * @param prefix 前缀
     */
    void printComponent(String prefix);
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}
组合的实现类
public class Composite implements Component{
    /**
     * 节点名称
     */
    private String name;
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    /**
     * 子节点名称
     */
    private List<Component> children = new ArrayList<>();
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    public Composite(String name) {
        this.name = name;
    }
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    /**
     * 增加一个子组件
     * @param child 子构件对象
     */
    public void addChild(Component child){
        children.add(child);
    }
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    @Override
    public void printComponent(String prefix) {
        System.out.println(prefix + "+" + name);
        if(null != children){
            for(Component c : children){
                c.printComponent(prefix + prefix);
            }
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        }
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    }
}
叶子节点的实现类
/**
 * 叶子节点
 * @author: songdewei
 * @date: 2020/6/22
 */
public class Leaf implements Component{
    /**
     * 叶子节点名称
     */
    private String name;
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    public Leaf(String name){
        this.name = name;
    }
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    @Override
    public void printComponent(String preStr) {
        System.out.println(preStr + "-" + name);
    }
}
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