工厂模式属于创建型模式,如果需要大量的创建实现同一个接口或者类的对象时，可以使用。
简单看下图例:
/** * Created by Administrator on 2016/11/18. */ public interface Worker { public void work(); }
/** * Created by Administrator on 2016/11/18. */ public class Doctor implements Worker { @Override public void work() { System.out.println("医生开始上班了"); } } /** * Created by Administrator on 2016/11/18. */ public class Student implements Worker { @Override public void work() { System.out.println("学生开始上课了"); } } /** * Created by Administrator on 2016/11/18. */ public class Teacher implements Worker { @Override public void work() { System.out.println("教师开始教学了"); } } public class Headmaster extends Teacher{ public void work(){ System.out.print("校长开始上班了"); } } /** * Created by Administrator on 2016/11/18. */ public class WorkFactory { public void work(Worker worker){ worker.work(); } /* *多个工厂方法,创建不同的工厂类,外部调用 */ public Worker StudentWork(){ return new Student(); } public Worker TeacherWork(){ return new Teacher(); } public Worker DoctorWork(){ return new Doctor(); } public Worker HeadmasterWork(){ return new Headmaster(); } /* *创建静态工厂类,外部调用 */ public static Worker StudentWork1(){ return new Student(); } public static Worker TeacherWork1(){ return new Teacher(); } public static Worker DoctorWork1(){ return new Doctor(); } public static Worker HeadmasterWork1(){ return new Headmaster(); } } /** * Created by Administrator on 2016/11/18. */ public class Test { public static void main(String[] args){ WorkFactory factory = new WorkFactory(); factory.work(new Doctor()); factory.work(new Teacher()); factory.work(new Student()); factory.work(new Headmaster()); factory.DoctorWork().work(); factory.TeacherWork().work(); factory.StudentWork().work(); factory.HeadmasterWork().work(); WorkFactory.DoctorWork1().work(); WorkFactory.TeacherWork1().work(); WorkFactory.StudentWork1().work(); WorkFactory.HeadmasterWork1().work(); } }
