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.
时间： 2025-01-17 18:02:55