JAVA SPI特性及简单应用代码实例

public interface IShape {
  /**
   * 渲染
   */
  void render();
}

public class CircularShape implements IShape {

  @Override
  public void render() {
    System.out.println(this.getClass().getName() + "正在绘制圆形");
  }
}

public class SquareShape implements IShape {

  @Override
  public void render() {
    System.out.println(this.getClass().getName() + "正在绘制正方形");
  }
}

public class SpiTest {
  public static void main(String[] args) {
    ServiceLoader<IShape> loaders = ServiceLoader.load(IShape.class);
    for (IShape shape : loaders) {
      shape.render();
    }
  }
}