桥梁模式特点在于，多个维度都可自由扩展，而继承只能向一个维度扩展。 代码来自《您的设计模式》
package com.pocketdigi.patterns.bridge;
public abstract class Product {
public abstract void beProducted();
public abstract void beSelled();
}
package com.pocketdigi.patterns.bridge;
/**
* 可根据需求扩展crop类
*/
public class HouseCrop extends Crop {
/**
* 只能生产House,所以参数为House,不是Product
* @param product
*/
public HouseCrop(House product) {
super(product);
// TODO Auto-generated constructor stub
}
@Override
public void makeMoney() {
// TODO Auto-generated method stub
super.makeMoney();
System.out.println("房地产公司赚大钱了...");
}
}
package com.pocketdigi.patterns.bridge;
/**
* 扩展Crop
*/
public class ShanZhaiCrop extends Crop {
/**
* 根据传入的Product不同，生产出不同的产品
* @param product
*/
public ShanZhaiCrop(Product product) {
super(product);
// TODO Auto-generated constructor stub
}
@Override
public void makeMoney() {
// TODO Auto-generated method stub
super.makeMoney();
System.out.println("我赚钱啦...");
}
}
package com.pocketdigi.patterns.bridge;
/**
* 产品，也可以根据需求自由扩展
*/
public abstract class Product {
public abstract void beProducted();
public abstract void beSelled();
}
package com.pocketdigi.patterns.bridge;
public class House extends Product {
@Override
public void beProducted() {
// TODO Auto-generated method stub
System.out.println("生产出的房子是这样的...");
}
@Override
public void beSelled() {
// TODO Auto-generated method stub
System.out.println("生产出的房子卖出去了...");
}
}
package com.pocketdigi.patterns.bridge;
public class Clothes extends Product {
@Override
public void beProducted() {
// TODO Auto-generated method stub
System.out.println("生产出的衣服是这样的...");
}
@Override
public void beSelled() {
// TODO Auto-generated method stub
System.out.println("生产出的衣服卖出去了...");
}
}
package com.pocketdigi.patterns.bridge;
public class IPod extends Product{
@Override
public void beProducted() {
// TODO Auto-generated method stub
System.out.println("生产出的IPod是这样的...");
}
@Override
public void beSelled() {
// TODO Auto-generated method stub
System.out.println("生产出的IPod卖出去了...");
}
}
使用:
//桥梁模式
Crop crop1=new HouseCrop(new House());
crop1.makeMoney();
Crop crop2=new ShanZhaiCrop(new Clothes());
crop2.makeMoney();
Crop crop3=new ShanZhaiCrop(new IPod());
crop3.makeMoney();