设计模式14---组合模式

组合模式可以理解为是树的结构的一种构建方式。

Composite是可以拓展的树的分支，树理论上可以无限长。

 

package com.jayfulmath.designpattern.composite;



public abstract class Company {

    

    protected String name;



    public Company(String name) {

        this.name = name;

    }

    

    public abstract void Add(Company c);

    public abstract void Remove(Company c);

    public abstract void Display(int depth);

    public abstract void LineofDuty();

    

    protected void printfObjectName(int depth) {

        StringBuilder builder = new StringBuilder();

        for(int i=0;i<depth;i++)

        {

            builder.append("-");

        }

        

        System.out.println(builder.toString()+name);

    }

}

package com.jayfulmath.designpattern.composite;



public class FianceDepartment extends Company {



    public FianceDepartment(String name) {

        super(name);

        // TODO Auto-generated constructor stub

    }



    @Override

    public void Add(Company c) {

        // TODO Auto-generated method stub



    }



    @Override

    public void Remove(Company c) {

        // TODO Auto-generated method stub



    }



    @Override

    public void Display(int depth) {

        // TODO Auto-generated method stub

        printfObjectName(depth);

    }



    @Override

    public void LineofDuty() {

        // TODO Auto-generated method stub

        System.out.println(name+"\t staff payoff");

    }



}

package com.jayfulmath.designpattern.composite;



public class HRDepartment extends Company {



    public HRDepartment(String name) {

        super(name);

        // TODO Auto-generated constructor stub

    }



    @Override

    public void Add(Company c) {

        // TODO Auto-generated method stub



    }



    @Override

    public void Remove(Company c) {

        // TODO Auto-generated method stub



    }



    @Override

    public void Display(int depth) {

        // TODO Auto-generated method stub

        printfObjectName(depth);

    }



    @Override

    public void LineofDuty() {

        // TODO Auto-generated method stub

        System.out.println(name+"\t staff recruitment ");

    }



}

package com.jayfulmath.designpattern.composite;



import com.jayfulmath.designpattern.main.BasicExample;



public class CompositeMain extends BasicExample {



    @Override

    public void startDemo() {

        // TODO Auto-generated method stub

        CompositeCompany root = new CompositeCompany("北京总公司");

        root.Add(new HRDepartment("总公司HR"));

        root.Add(new FianceDepartment("总公司FD"));

        

        CompositeCompany comp = new CompositeCompany("上海分公司");

        comp.Add(new HRDepartment("上海分公司HR"));

        comp.Add(new FianceDepartment("上海分公司FD"));

        root.Add(comp);

        

        CompositeCompany comp1 = new CompositeCompany("浦东办事处");

        comp1.Add(new HRDepartment("浦东办事处HR"));

        comp1.Add(new FianceDepartment("浦东办事处FD"));

        comp.Add(comp1);

        

        CompositeCompany comp2 = new CompositeCompany("人民广场办事处");

        comp2.Add(new HRDepartment("人民广场办事处HR"));

        comp2.Add(new FianceDepartment("人民广场办事处FD"));

        comp.Add(comp2);

        

        System.out.println("结构图：");

        root.Display(1);

        

        System.out.println("职责：");

        root.LineofDuty();

    }



}

package com.jayfulmath.designpattern.composite;



import com.jayfulmath.designpattern.main.BasicExample;



public class CompositeMain extends BasicExample {



    @Override

    public void startDemo() {

        // TODO Auto-generated method stub

        CompositeCompany root = new CompositeCompany("北京总公司");

        root.Add(new HRDepartment("总公司HR"));

        root.Add(new FianceDepartment("总公司FD"));

        

        CompositeCompany comp = new CompositeCompany("上海分公司");

        comp.Add(new HRDepartment("上海分公司HR"));

        comp.Add(new FianceDepartment("上海分公司FD"));

        root.Add(comp);

        

        CompositeCompany comp1 = new CompositeCompany("浦东办事处");

        comp1.Add(new HRDepartment("浦东办事处HR"));

        comp1.Add(new FianceDepartment("浦东办事处FD"));

        comp.Add(comp1);

        

        CompositeCompany comp2 = new CompositeCompany("人民广场办事处");

        comp2.Add(new HRDepartment("人民广场办事处HR"));

        comp2.Add(new FianceDepartment("人民广场办事处FD"));

        comp.Add(comp2);

        

        System.out.println("结构图：");

        root.Display(1);

        

        System.out.println("职责：");

        root.LineofDuty();

    }



}

运行结果：

结构图：

-北京总公司

---总公司HR

---总公司FD

---上海分公司

-----上海分公司HR

-----上海分公司FD

-----浦东办事处

-------浦东办事处HR

-------浦东办事处FD

-----人民广场办事处

-------人民广场办事处HR

-------人民广场办事处FD

职责：

总公司HR     staff recruitment 

总公司FD     staff payoff

上海分公司HR     staff recruitment 

上海分公司FD     staff payoff

浦东办事处HR     staff recruitment 

浦东办事处FD     staff payoff

人民广场办事处HR     staff recruitment 

人民广场办事处FD     staff payoff

 

Leaf 是没有add和remove功能的，但是保留这两个接口可以是代码保持统一性.