1 工厂模式

类实例化交给工厂，使用者只需提供类名或工厂名完成实例化。工厂模式有两种实现方式，一种是普通工厂，即工厂中实现类实例化，另一种是抽象工厂，即工厂的工厂，实际使用的工厂继承抽象工厂，抽象工厂中获取工厂接口。

2 Usage

2.1 Person接口

package basic.datatype.pattern.factory;/** * Person interface. * @author xindaqi * @since 2020-09-30 */public interface Person {           public void language();    }

2.2 Chinese实现

package basic.datatype.pattern.factory;/** * Chinese implements. * @author xindaqi * @since 2020-09-30 */public class Chinese implements Person{       @Override    public void language(){           System.out.println("====Chinese====");    }    }

2.3 English实现

package basic.datatype.pattern.factory;/** * English implements. * @author xindaqi * @since 2020-09-30 */public class English implements Person{       @Override    public void language(){           System.out.println("====English====");    }    }

2.4 Person工厂

package basic.datatype.pattern.factory;/** * Person factory. * @author xindaqi * @since 2020-09-30 */public class PersonFactory {       public Person getLanguage(String language){           if(language == null){               return null;        }        if(language.equalsIgnoreCase("Chinese")){               return new Chinese();        }else if(language.equalsIgnoreCase("English")){               return new English();        }        return null;    }    }

2.5 工厂模式

package basic.datatype.pattern.factory;/** * Person factory test. * @author xindaqi * @since 2020-09-30 */public class FactoryPatternTest {       public static void main(String[] args){           PersonFactory personFactory = new PersonFactory();        Person chineseLanguage = personFactory.getLanguage("chinese");        chineseLanguage.language();        Person englishLanguage = personFactory.getLanguage("english");        englishLanguage.language();    }    }