基于Java的样例：
比如现实中公司内各部门的层级关系
抽象接口类：
package com.zyh.designpattern.composite;
public abstract class Company {
private String name;
public Company(String name) {
super();
this.name = name;
}
public Company(){}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
protected abstract void add(Company company);
protected abstract void romove(Company company);
protected abstract void display(int depth);
}
枝结点类：
package com.zyh.designpattern.composite;
import java.util.ArrayList;
import java.util.List;
public class ConcreteCompany extends Company {
private List
cList;
public ConcreteCompany() {
cList = new ArrayList();
}
public ConcreteCompany(String name) {
super(name);
cList = new ArrayList();
}
@Override
protected void add(Company company) {
// TODO Auto-generated method stub
cList.add(company);
}
@Override
protected void display(int depth) {
// TODO Auto-generated method stub
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < depth; i ) {
sb.append("-");
}
System.out.println(new String(sb) this.getName());
for (Company c : cList) {
c.display(depth 2);
}
}
@Override
protected void romove(Company company) {
// TODO Auto-generated method stub
cList.remove(company);
}
}
两个叶结点类：
-------------------------
1---------------------------.
package com.zyh.designpattern.composite;
public class HRDepartment extends Company {
public HRDepartment(String name) {
super(name);
}
@Override
protected void add(Company company) {
}
@Override
protected void display(int depth) {
// TODO Auto-generated method stub
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < depth; i ) {
sb.append("-");
}
System.out.println(new String(sb) this.getName());
}
@Override
protected void romove(Company company) {
}
}
----------------2-------------------
package com.zyh.designpattern.composite;
public class FinanceDepartment extends Company {
public FinanceDepartment(String name) {
super(name);
}
@Override
protected void add(Company company) {
}
@Override
protected void display(int depth) {
// TODO Auto-generated method stub
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < depth; i ) {
sb.append("-");
}
System.out.println(new String(sb) this.getName());
}
@Override
protected void romove(Company company) {
}
}
客户端：
package com.zyh.designpattern.composite;
public class Client {
public static void main(String[] args) {
// TODO Auto-generated method stub
Company root = new ConcreteCompany();
root.setName("北京总公司");
root.add(new HRDepartment("总公司人力资源部"));
root.add(new FinanceDepartment("总公司财务部"));
Company shandongCom = new ConcreteCompany("山东分公司");
shandongCom.add(new HRDepartment("山东分公司人力资源部"));
shandongCom.add(new FinanceDepartment("山东分公司账务部"));
Company zaozhuangCom = new ConcreteCompany("枣庄办事处");
zaozhuangCom.add(new FinanceDepartment("枣庄办事处财务部"));
zaozhuangCom.add(new HRDepartment("枣庄办事处人力资源部"));
Company jinanCom = new ConcreteCompany("济南办事处");
jinanCom.add(new FinanceDepartment("济南办事处财务部"));
jinanCom.add(new HRDepartment("济南办事处人力资源部"));
shandongCom.add(jinanCom);
shandongCom.add(zaozhuangCom);
Company huadongCom = new ConcreteCompany("上海华东分公司");
huadongCom.add(new HRDepartment("上海华东分公司人力资源部"));
huadongCom.add(new FinanceDepartment("上海华东分公司账务部"));
Company hangzhouCom = new ConcreteCompany("杭州办事处");
hangzhouCom.add(new FinanceDepartment("杭州办事处财务部"));
hangzhouCom.add(new HRDepartment("杭州办事处人力资源部"));
Company nanjingCom = new ConcreteCompany("南京办事处");
nanjingCom.add(new FinanceDepartment("南京办事处财务部"));
nanjingCom.add(new HRDepartment("南京办事处人力资源部"));
huadongCom.add(hangzhouCom);
huadongCom.add(nanjingCom);
root.add(shandongCom);
root.add(huadongCom);
root.display(0);
}
}
基于C 的样例:
//Menu.h
#include
class Menu
{
public:
virtual ~Menu();
virtual void Add(Menu*);
virtual void Remove(Menu*);
virtual Menu* GetChild(int);
virtual void Display() = 0;
protected:
Menu();
Menu(std::string);
std::string m_strName;
};
//Menu.cpp
#include "stdafx.h"
#include "Menu.h"
Menu::Menu()
{
}
Menu::Menu(std::string strName) : m_strName(strName)
{
}
Menu::~Menu()
{
}
void Menu::Add(Menu* pMenu)
{}
void Menu::Remove(Menu* pMenu)
{}
Menu* Menu::GetChild(int index)
{
return NULL;
}
//SubMenu.h
#include "Menu.h"
class SubMenu : public Menu
{
public:
SubMenu();
SubMenu(std::string);
virtual ~SubMenu();
void Display();
};
//SubMenu.cpp
#include "stdafx.h"
#include "SubMenu.h"
#include
using namespace std;
SubMenu::SubMenu()
{
}
SubMenu::SubMenu(string strName) : Menu(strName)
{
}
SubMenu::~SubMenu()
{
}
void SubMenu::Display()
{
cout << m_strName << endl;
}
//CompositMenu.h
#include "Menu.h"
#include
class CompositMenu : public Menu
{
public:
CompositMenu();
CompositMenu(std::string);
virtual ~CompositMenu();
void Add(Menu*);
void Remove(Menu*);
Menu* GetChild(int);
void Display();
private:
std::vector
m_vMenu;
};
//CompositMenu.cpp
#include "stdafx.h"
#include "CompositMenu.h"
#include
using namespace std;
CompositMenu::CompositMenu()
{
}
CompositMenu::CompositMenu(string strName) : Menu(strName)
{
}
CompositMenu::~CompositMenu()
{
}
void CompositMenu::Add(Menu* pMenu)
{
m_vMenu.push_back(pMenu);
}
void CompositMenu::Remove(Menu* pMenu)
{
m_vMenu.erase(&pMenu);
}
Menu* CompositMenu::GetChild(int index)
{
return m_vMenu[index];
}
void CompositMenu::Display()
{
cout << " " << m_strName << endl;
vector
::iterator it = m_vMenu.begin();
for (; it != m_vMenu.end(); it)
{
cout << "|-";
(*it)->Display();
}
}
#include "stdafx.h"
#include "Menu.h"
#include "SubMenu.h"
#include "CompositMenu.h"
int main(int argc, char* argv[])
{
Menu* pMenu = new CompositMenu("国内新闻");
pMenu->Add(new SubMenu("时事新闻"));
pMenu->Add(new SubMenu("社会新闻"));
pMenu->Display();
pMenu = new CompositMenu("国际新闻");
pMenu->Add(new SubMenu("国际要闻"));
pMenu->Add(new SubMenu("环球视野"));
pMenu->Display();
return 0;
}2100433B
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