反射和SPI

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反射

• 知道具体类的情况下可以使用：

  Class alunderClass = TargetObject.class;

• 通过Class.forName()传入类的全部路径获取：

  Class alunderClass = Class.forName(\"org.example.TargetObject\");

• 通过对象实例instance.getClass()获取：

  TargetObject 0 = new TargetObject();Classs alunderClass = o.getClass();

• 通过类加载器xxxClassLoader.loadClass()传入类路径获取：

  ClassLoader.getSystemClassLoader().loadClass();

SPI

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