一個形狀基類..
一個圓
一個矩形。。。
一個工廠根據(jù)參數(shù)返回形狀子類
老掉牙的類名..英文不好...

——————————————-java——————————————————-
形狀基類

package?com.shiji.gongchang;

public?interface?XingZhuang?{

????????void???Run();
}

package?com.shiji.gongchang;

//圓形類?繼承自形狀
public?class?Circle??implements?XingZhuang?{

????@Override
????public?void?Run()?{
????????//?TODO?Auto-generated?method?stub
????????System.out.println("Im?Cirlce!");

????}

}

package?com.shiji.gongchang;
//矩形類??繼承自形狀
public?class?Rectangle?implements?XingZhuang?{

????@Override
????public?void?Run()?{
????????//?TODO?Auto-generated?method?stub
????????System.out.println("Rectangle!");
????}


}

工廠

package?com.shiji.gongchang;

public?class?XingZhuangFactory?{

????public?XingZhuang?CreateXingzhuang(String?obj)
????{

????????????if(obj=="矩形")
????????????{
????????????????return??new?Rectangle();
????????????}else?if?(obj=="圓")?{
????????????????return?new?Circle();

????????????}

????????????return?null;

????}
}

測試

//工廠模式
public?class?GongChangMoshi?{

????public?static?void?main(String[]?args)?{
????????XingZhuangFactory??xingZhuangFactory??=??new?XingZhuangFactory();
????????xingZhuangFactory.CreateXingzhuang("矩形").Run();
????????xingZhuangFactory.CreateXingzhuang("圓").Run();
????}
????//靜態(tài)方法?加載C++類庫??test.dll
????static?{
?????????System.loadLibrary("JniTest");
????}
}

——————————————-C++——————————————————-
形狀基類

#pragma?once
class?Xingzhuang
{
public:
????virtual?void?Run()=0;
????Xingzhuang();
????~Xingzhuang();
};

圓…

#pragma?once
#include?"Xingzhuang.h"
class?Circle?:public?Xingzhuang
{
public:
????virtual?void?Run();
????Circle();
????~Circle();
};

cpp:
#include?"stdafx.h"
#include?"Circle.h"


Circle::Circle()
{
}


Circle::~Circle()
{
}



void?Circle::Run()
{
????printf("Im?Circle~!");
}

方塊，…

#pragma?once
#include?"Xingzhuang.h"
class?Rectangle??:public?Xingzhuang
{
public:
????virtual?void?Run();
????Rectangle();
????~Rectangle();
};


cpp:
#include?"stdafx.h"
#include?"Rectangle.h"


Rectangle::Rectangle()
{
}


Rectangle::~Rectangle()
{
}



void?Rectangle::Run()
{
????printf("Im?Rectangle!");
}

工廠 ? ? ? ? ? ? ? ? ? ?-，-

#pragma?once
#include?"Xingzhuang.h"
enum?_Xtype
{
????_rectangle=0,
????_circle=1
};
class?Factory
{
public:
????Factory();
????Xingzhuang*??Create(_Xtype??t);
????~Factory();
};

cpp：
#include?"stdafx.h"
#include?"Factory.h"
#include?"Circle.h"
#include?"Rectangle.h"

Factory::Factory()
{
}


Factory::~Factory()
{
}



Xingzhuang*??Factory::Create(_Xtype??t)
{

????if?(t==_Xtype::_rectangle)
????{
????????Rectangle*??p?=?new?Rectangle();
????????return?p;
????}else?if?(t==_Xtype::_circle)
????{
????????Circle*p?=?new?Circle();
????????return?p;
????}
????return?NULL;
}

demo:

#include?"stdafx.h"
#include?"Factory.h"?


inline?void?test(_Xtype??t)
{
????Factory*?f?=?new?Factory();
????if?(f)
????{
????????Xingzhuang*?x?=?NULL;
????????x?=?f->Create(t);
????????if?(x)
????????{
????????????x->Run();
????????????delete?x;
????????}
????????delete?f;
????}


}
int?main()
{?
????test(_Xtype::_circle);
????test(_Xtype::_rectangle);
????return?0;
}