Java设计模式之工厂模式分析【简单工厂、工厂方法、抽象工厂】

/**
 * 简单工厂模式
 *
 * 需要工厂生产的对象实例所实现的共同的接口
 * 发型接口
 * @author Administrator
 *
 */
public interface Hair {
  /**
   * 画发型
   */
  public void draw();
}
/**
 * 左偏分发型
 * @author Administrator
 *
 */
public class LeftHair implements Hair {
  @Override
  public void draw() {
    System.out.println("----------------画左偏分发型-----------------");
  }
}
/**
 * 右偏分发型
 * @author Administrator
 *
 */
public class RightHair implements Hair {
  @Override
  public void draw() {
    System.out.println("-----------------画右偏分发型------------------");
  }
}
/**
 * 生产发型的工厂
 * 要生产什么发型 只需在这里改就行了
 * @author Administrator
 *
 */
public class HairFactory {
  public Hair getHair() {
    return new LeftHair();
    //return new RightHair();
  }
}
/**
 * 客户端测试类
 * @author Administrator
 *
 */
public class HairTest {
  public static void main(String[] args) {
    HairFactory factory = new HairFactory();
    Hair hair = factory.getHair();
    hair.draw();
  }
}

public interface HairBuilder {
  /**
   * 制造发型
   * @return
   */
  public Hair getHair();
}
public class LeftHairBuilder implements HairBuilder {
  @Override
  public Hair getHair() {
    return new LeftHair();
  }
}
public class RightHairBuilder implements HairBuilder {
  @Override
  public Hair getHair() {
    return new RightHair();
  }
}
public class HairFactory {
  private HairBuilder hairBuilder;
  public HairFactory(HairBuilder hairBuilder) {
    this.hairBuilder = hairBuilder;
  }
  public void setHairBuilder(HairBuilder hairBuilder) {
    this.hairBuilder = hairBuilder;
  }
  public Hair getHair() {
    return hairBuilder.getHair();
  }
}
public class HairTest {
  public static void main(String[] args) {
//   HairBuilder builder = new LeftHairBuilder();
    HairBuilder builder = new RightHairBuilder();
    HairFactory factory = new HairFactory(builder);
    Hair hair = factory.getHair();
    hair.draw();
  }
}

/**
 * 工厂方法模式
 * 需要工厂生产的对象实例所实现的共同的接口
 * @author Administrator
 *
 */
public interface Person {
  public void drawPerson();
}
public class Man implements Person {
  @Override
  public void drawPerson() {
    System.out.println("---------------------draw a man--------------------");
  }
}
public class Women implements Person {
  @Override
  public void drawPerson() {
    System.out.println("--------------------draw a women---------------------");
  }
}
/**
 * 生产人的工厂
 * @author Administrator
 *
 */
public interface PersonFactory {
  //生产人
  public Person getPerson();
}
/**
 * 生产man的工厂
 * @author Administrator
 *
 */
public class ManFactory implements PersonFactory {
  @Override
  public Person getPerson() {
    return new Man();
  }
}
/**
 * 声场women的工厂
 * @author Administrator
 *
 */
public class WomenFactory implements PersonFactory {
  @Override
  public Person getPerson() {
    return new Women();
  }
}
/**
 * 客户端测试类
 * @author Administrator
 *
 */
public class PersonTest {
  public static void main(String[] args) {
//   PersonFactory factory = new ManFactory();
    PersonFactory factory = new WomenFactory();
    Person person = factory.getPerson();
    person.drawPerson();
  }
}

/**
 * 抽象工厂模式
 * 生产PersonFactory的工厂
 * @author Administrator
 *
 */
public class PersonFactoryFactory {
  public static PersonFactory getPersonFactory(String type) {
    if(type.equalsIgnoreCase("man")) {
      return new ManFactory();
    } else {
      return new WomenFactory();
    }
  }
}
/**
 * 客户端测试类
 * @author Administrator
 *
 */
public class PersonTest {
  public static void main(String[] args) {
    PersonFactory factory = PersonFactoryFactory.getPersonFactory("man");
    Person person = factory.getPerson();
    person.drawPerson();
  }
}