SpringFactoriesLoader 类似JAVA默认的SPI 机制，只不过以服务接口命名的文件是放在 META-INF/spring.factories 文件夹下。
public interface MyService {
void handle();
}
public class MyServiceImpl1 implements MyService {
@Override
public void handle() {
System.out.println("1");
}
}
public class MyServiceImpl2 implements MyService {
@Override
public void handle() {
System.out.println("2");
}
}
在 META-INF/spring.factories中增加接口声明
com.github.edgar615.spring.factory.MyService=\
com.github.edgar615.spring.factory.impl.MyServiceImpl1,\
com.github.edgar615.spring.factory.impl.MyServiceImpl2
读取
List<MyService> classes = SpringFactoriesLoader.loadFactories(MyService.class, Application.class.getClassLoader());
