Java的工厂模式(Factory)

 

1 实例：

package com.javapatterns.factorymethod.farm;

public interface Fruit
...{
    void grow();

    void harvest();

    void plant();
}

 

package com.javapatterns.factorymethod.farm;

public class Apple implements Fruit
...{
    private int treeAge;

    public void grow()
    ...{
        System.out.println("Apple is growing...");
    }

    public void harvest()
    ...{
        System.out.println("Apple has been harvested.");
    }

    public void plant()
    ...{
        System.out.println("Apple has been planted.");
    }

    public int getTreeAge()
    ...{
        return treeAge;
    }

    public void setTreeAge(int treeAge)
    ...{
        this.treeAge = treeAge;
    }

}

 

 

 

package com.javapatterns.factorymethod.farm;
                                                         
public class StrawberryGardener implements FruitGardener 
...{
    public Fruit factory()
    ...{
        return new Apple();
    }
}

 

package com.javapatterns.factorymethod.farm;
                                                         
public class AppleGardener implements FruitGardener 
...{
    public Fruit factory()
    ...{
        return new Apple();
    }
}

 

package com.javapatterns.factorymethod.farm;
                                                         
public class GrapeGardener implements FruitGardener 
...{
    public Fruit factory()
    ...{
        return new Apple();
    }
}

package com.javapatterns.factorymethod.farm;

public interface FruitGardener
...{
    public Fruit factory();

    /** *//** @link dependency 
     * @label Creates*/
    /**//*# Fruit lnkFruit; */
}

 

package com.javapatterns.factorymethod.farm;

public class Grape implements Fruit
...{
    public void grow()
    ...{
        System.out.println("Grape is growing...");
    }

    public void harvest()
    ...{
        System.out.println("Grape has been harvested.");
    }

    public void plant()
    ...{
        System.out.println("Grape has been planted.");
    }

    public boolean getSeedless()
    ...{
        return seedless;
    }

    public void setSeedless(boolean seedless)
    ...{
        this.seedless = seedless;
    }

    private boolean seedless;
}

package com.javapatterns.factorymethod.farm;

public class Strawberry implements Fruit
...{
    
    public void grow()
    ...{
        System.out.println("Strawberry is growing...");
    }

    public void harvest()
    ...{
        System.out.println("Strawberry has been harvested.");
    }

    public void plant()
    ...{
        System.out.println("Strawberry has been planted.");
    }

}

 

/**//*
 * FruitFactory.java
 *
 * Created on 2008年3月1日, 上午11:33
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.javapatterns.factorymethod.farm;

/** *//**
 *
 * @author rulinma
 */
public class FruitFactory ...{
    
    /** *//** Creates a new instance of FruitFactory */
    public FruitFactory() ...{
    }
    
    public static Fruit factory(String type)
    ...{
        if(type.equals("apple"))
        ...{
            return new Apple();
        }
        else if (type.equals("grape"))
        ...{
            return new Grape();
        }
        else
        ...{
            return new Strawberry();
        }
    }
    
    public static void main(String[] args)
    ...{
    Fruit f = factory("apple");
        f.plant();
        f.grow();
        f.harvest();
    }
}

 

init:
deps-jar:
compile-single:
run-single:
Apple has been planted.
Apple is growing...
Apple has been harvested.
生成成功（总时间：1 秒）