工厂类

    1. package miluo.design.patterns.simpleFactory;
    3. /**
    4.  * @author Miluo
    5.  * @className MachineFactory
    6.  * @description 工厂类
    7.  * @date 2022/2/16
    8.  **/
    9. public class MachineFactory {
    10.     public static Machine getMachine(String country) throws Exception {
    11.         if ("cn".equals(country.toLowerCase())) {
    12.             return new ChinaMachine();
    13.         }else if ("usa".equals(country.toLowerCase())){
    14.             return new AmericanMachine();
    15.         }else {
    16.             throw new Exception("请输入正确参数");
    17.         }
    18.     }
    19. }

    抽象产品类

    1. package miluo.design.patterns.simpleFactory;
    3. /**
    4.  * @author Miluo
    5.  * @className Machine
    6.  * @description 抽象产品类
    7.  * @date 2022/2/16
    8.  **/
    9. public abstract class Machine {
    10.     /**
    11.      * sayHello
    12.      * @return String 
    13.      */
    14.     public abstract String welcome();
    15. }

    具体产品类

    1. package miluo.design.patterns.simpleFactory;
    3. /**
    4.  * @author Miluo
    5.  * @className ChinaMachine
    6.  * @description
    7.  * @date 2022/2/16
    8.  **/
    9. public class ChinaMachine extends Machine {
    10.     @Override
    11.     public String welcome() {
    12.         return "你好";
    13.     }
    14. }
    1. package miluo.design.patterns.simpleFactory;
    3. /**
    4.  * @author Miluo
    5.  * @className ChinaMachine
    6.  * @description
    7.  * @date 2022/2/16
    8.  **/
    9. public class AmericanMachine extends Machine {
    10.     @Override
    11.     public String welcome() {
    12.         return "Hello";
    13.     }
    14. }

    测试

    1. package miluo.design.patterns.simpleFactory;
    3. /**
    4.  * @author Miluo
    5.  * @className testSimpleFactory
    6.  * @description
    7.  * @date 2022/2/16
    8.  **/
    9. public class TestSimpleFactory {
    10.     public static void main(String[] args) {
    11.         try {
    12.             Machine cn = MachineFactory.getMachine("cn");
    13.             System.out.println(cn.welcome());
    14.             Machine usa = MachineFactory.getMachine("USA");
    15.             System.out.println(usa.welcome());
    16.             Machine jp = MachineFactory.getMachine("jp");
    17.             System.out.println(jp.welcome());
    18.         } catch (Exception e) {
    19.             e.printStackTrace();
    20.         }
    21.     }
    22. }
    24. **********************************
    25. Connected to the target VM, address: '127.0.0.1:7163', transport: 'socket'
    26. 你好
    27. Hello
    28. java.lang.Exception: 请输入正确参数
    29.     at miluo.design.patterns.simpleFactory.MachineFactory.getMachine(MachineFactory.java:16)
    30.     at miluo.design.patterns.simpleFactory.TestSimpleFactory.main(TestSimpleFactory.java:16)
    31. Disconnected from the target VM, address: '127.0.0.1:7163', transport: 'socket'
    33. Process finished with exit code 0
    34. **********************************

    测试

    1. package miluo.design.patterns.factoryMethod;
    3. import miluo.design.patterns.simpleFactory.Machine;
    5. /**
    6.  * @author Miluo
    7.  * @className TestFactoryMethod
    8.  * @description
    9.  * @date 2022/2/16
    10.  **/
    11. public class TestFactoryMethod {
    12.     public static void main(String[] args) {
    13.         CnFactory cnFactory = new CnFactory();
    14.         Machine cnFactoryMachine = cnFactory.getMachine();
    15.         System.out.println(cnFactoryMachine.welcome());
    16.         UsaFactory usaFactory = new UsaFactory();
    17.         Machine usaFactoryMachine = usaFactory.getMachine();
    18.         System.out.println(usaFactoryMachine.welcome());
    19.     }
    20. }
    22. ***********************************
    23. Connected to the target VM, address: '127.0.0.1:7725', transport: 'socket'
    24. 你好
    25. Hello
    26. Disconnected from the target VM, address: '127.0.0.1:7725', transport: 'socket'
    27. ***********************************