组合模式打印窗口组件的树结构

package com.cyc.demo.composite;
/**
 * 组合部件
 * @author CHENYANCHUN
 */
public abstract  class Component {
    /**
     * 操作接口
     * @param printStr
     */
    public abstract void operation(String printStr);
    public void addChild(Component child){
        throw new UnsupportedOperationException("对象不支持此功能");
    }
    public void removeChild(Component child){
        throw new UnsupportedOperationException("对象不支持此功能");
    }
}

package com.cyc.demo.composite;
import org.springframework.util.CollectionUtils;
import java.util.ArrayList;
import java.util.List;
/**
 * @author CHENYANCHUN
 * 枝类
 */
public class Composite extends Component{
    private String name;
    private List<Component> childComponents = new ArrayList<>();
    public Composite(String name){
        this.name = name;
    }
    @Override
    public void operation(String printStr) {
        System.out.println(printStr + " " + name);
        if(!CollectionUtils.isEmpty(childComponents)){
            childComponents.forEach(x -> {
                x.operation(printStr);
            });
        }
    }
    @Override
    public void addChild(Component child){
        childComponents.add(child);
    }
    @Override
    public void removeChild(Component child){
        childComponents.remove(child);
    }
}

package com.cyc.demo.composite;
/**
 * @author CHENYANCHUN
 * 叶子类
 */
public class Leaf extends Component{
    private String name;
    public Leaf(String name){
        this.name =name;
    }
    @Override
    public void operation(String printStr) {
        System.out.println(printStr + " " + name);
    }
}

package com.cyc.demo.composite;
/**
 * @author CHENYANCHUN
 * 输出窗口组件
 */
public class ComponentPrint {
    public static void main(String[] args) {
        Composite winform = new Composite("WinForm");
        Component picture = new Leaf("Picture");
        Component loginButton = new Leaf("LoginButton");
        Component signUpButton = new Leaf("SignUpButton");
        Composite frame = new Composite("Frame");
        Component userNameLable = new Leaf("UserNameLable");
        Component textBox = new Leaf("TextBox");
        Component passwordLable = new Leaf("PasswordLable");
        Component passwordBox = new Leaf("PasswordBox");
        Component checkBox = new Leaf("CheckBox");
        Component rememberTextBox = new Leaf("RememberTextBox");
        Component linkLable = new Leaf("LinkLable");
        frame.addChild(userNameLable);
        frame.addChild(textBox);
        frame.addChild(passwordLable);
        frame.addChild(passwordBox);
        frame.addChild(checkBox);
        frame.addChild(rememberTextBox);
        frame.addChild(linkLable);
        winform.addChild(picture);
        winform.addChild(loginButton);
        winform.addChild(signUpButton);
        winform.addChild(frame);
        winform.operation("print");
    }
}

print WinForm
print Picture
print LoginButton
print SignUpButton
print Frame
print UserNameLable
print TextBox
print PasswordLable
print PasswordBox
print CheckBox
print RememberTextBox
print LinkLable