Java-模块化讲解练习代码

f1包：
package com.f1;

public class Student {
    public void study(){
        System.out.println("好好学习，天天向上");
    }
}

f2包：
package com.f2;

public class Teacher {
    public void teach(){
        System.out.println("化作春泥更护花");
    }
}

f3包：
package com.f3;

public interface MyService {
    void service();
}

    impl包：
    package com.f3.impl;

    import com.f3.MyService;

    public class Czxy implements MyService {
        @Override
        public void service() {
            System.out.println("传智学院");
        }
    }

    package com.f3.impl;

    import com.f3.MyService;

    public class Itheima implements MyService {
        @Override
        public void service() {
            System.out.println("it黑马");
        }
    }

src包下：module-info.java:

import com.f3.MyService;
import com.f3.impl.Czxy;
import com.f3.impl.Itheima;

module myOne {
    exports com.f1;
    exports com.f3;

//    provides MyService with Itheima;
    provides MyService with Czxy;
}

cn.t1包下：
Test01：

package cn.t1;

import com.f1.Student;
//import com.f2.Teacher;

public class Test01 {
    public static void main(String[] args) {
        Student s = new Student();
        s.study();

        //Teacher t = new Teacher();
    }
}



Test02：

package cn.t1;

import com.f3.MyService;
import java.util.ServiceLoader;

public class Test02 {
    public static void main(String[] args) {
        //加载服务
        ServiceLoader<MyService> myServices = ServiceLoader.load(MyService.class);

        //遍历服务
        for(MyService my : myServices){
            my.service();
        }
    }
}

src包下：module-info.java:
import com.f3.MyService;

module myTwo {
    requires myOne;

    uses MyService;
}