43、java.beans.PropertyDescriptor类
//上述示例，用复杂的内省操作，代码如下private static Object getProperty(Object obj,String propertyName) throws Exception {BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();Object retVal = null;for(PropertyDescriptor pd : pds){if(pd.getName().equals(propertyName))retVal = pd.getReadMethod().invoke(obj);}return retVal;}

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