30-31内省访问JavaBean属性的两种方法
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//pt1为javaBean对象，propertyName为要设置的属性，value为给javaBean的值private static void setProperties(Object pt1, String propertyName, Object value) throws IntrospectionException, IllegalAccessException, InvocationTargetException { PropertyDescriptor pd = new PropertyDescriptor(propertyName,pt1.getClass()); Method methodSetX = pd.getWriteMethod(); methodSetX.invoke(pt1, value); }//pt1为javaBean对象，propertyName为要获取的属性 private static Object getProperty(Object pt1, String propertyName) throws IntrospectionException, IllegalAccessException, InvocationTargetException { PropertyDescriptor pd=new PropertyDescriptor(propertyName, pt1.getClass()); Method methodGetX=pd.getReadMethod(); Object retVal=methodGetX.invoke(pt1);//因为不知道返回的是什么类型，所以用Object return retVal; } ?
private static Object getProperty(Object pt1, String propertyName)throws Exception {/*PropertyDescriptor pd=new PropertyDescriptor(propertyName, pt1.getClass());Method methodGetX=pd.getReadMethod();Object retVal=methodGetX.invoke(pt1);//因为不知道返回的是什么类型，所以用Object*/BeanInfo beanInfo = Introspector.getBeanInfo(pt1.getClass());PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();Object retVal = null;for(PropertyDescriptor pd : pds){if(pd.getName().equals(propertyName)){Method methodGetX = pd.getReadMethod();retVal = methodGetX.invoke(pt1);break;}}return retVal;}?
