组合设计模式编码 & 手写单例模式

吴建中

关注

发布于: 2020 年 06 月 25 日

组合设计模式实现 window 树结构

类图

定义组件接口，模板类和各具体的组件，引入了组件模板抽象类，目的是为了提供一些默认的实现和公共的方法。

Component 接口：

package threeday;
public interface Component {
    public void print();}

复制代码

ComponentTemplate 抽象

package threeday;
import java.util.ArrayList;import java.util.List;
/** * 定义模板，提供默认实现，同时提供一些公共的方法 */public abstract class  ComponentTemplate implements  Component {
    private  String componetName;
    public  ComponentTemplate(String componetName){            this.componetName = componetName;    }
    protected List components = new ArrayList();
    public void setComponents(List components){        this.components = components;    }
    public List getComponents(){
        return this.components;    }

    public void print(){        System.out.println(componetName);    }}

复制代码

WindowFrom 实现类

package threeday;
import java.util.ArrayList;import java.util.List;
public class WindowForm extends ComponentTemplate {
    public WindowForm(String componetName) {        super(componetName);    }
    public void print() {
        super.print();        for(int i=0;i<super.components.size();i++){            Component component  = (Component)super.components.get(i);            component.print();        }    }}

复制代码

Frame 实现类

package threeday;
import java.util.ArrayList;import java.util.List;
public class Frame extends ComponentTemplate {
    public Frame(String componetName) {        super(componetName);    }

    public void print() {
        super.print();
        for(int i=0;i<super.components.size();i++){            Component component  = (Component)super.components.get(i);            component.print();        }    }}

复制代码

Picture 实现类

package threeday;
public class Picture extends ComponentTemplate {
    public Picture(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

Button 实现类

package threeday;
public class Button extends ComponentTemplate {
    public Button(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

Checkbox 实现类

package threeday;
public class CheckBox extends ComponentTemplate {
    public CheckBox(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

Label 实现类

package threeday;
public class Lable extends ComponentTemplate {
    public Lable(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

LinkLabel 实现类

package threeday;
public class LinkLable extends ComponentTemplate {
    public LinkLable(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

PasswordBox 实现类

package threeday;
public class PasswordBox extends ComponentTemplate {
    public PasswordBox(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

TextBox 实现类

package threeday;
public class TextBox extends ComponentTemplate {
    public TextBox(String componetName) {        super(componetName);    }
    public void print() {        super.print();    }}

复制代码

组织类 main 入口

package threeday;
import java.util.ArrayList;import java.util.List;
public class Assembler {
    public static void main(String args[]){
        // 实例化所有的页面元素        Component windowForm = new WindowForm("WINDOW 窗口");        Component picture = new Picture("LOGO 图片");        Component buttonDL = new Button("登录");        Component buttonZC = new Button("注册");        Component frame = new Frame("FRAME1");        Component lableUserName = new Lable("用户名");        Component textBox = new TextBox("文本框");        Component passwordLable = new Lable("密码");        Component password = new PasswordBox("密码框");        Component chekbox = new CheckBox("复选框");        Component textBoxUserName = new TextBox("记住用户名");        Component linkLable = new LinkLable("忘记密码");

        // 组装windowForm        List windowFormComList = new ArrayList();        windowFormComList.add(picture);        windowFormComList.add(buttonDL);        windowFormComList.add(buttonZC);        windowFormComList.add(frame);        ((WindowForm) windowForm).setComponents(windowFormComList);

        // 组装frame        List frameComList = new ArrayList();        frameComList.add(lableUserName);        frameComList.add(textBox);        frameComList.add(passwordLable);        frameComList.add(password);        frameComList.add(chekbox);        frameComList.add(textBoxUserName);        frameComList.add(linkLable);
        ((Frame) frame).setComponents(frameComList);
        windowForm.print();    }}