在JSF定制组件中，有什么方法可以确保属性包含正确的值？

Question

For example, let's say that I have a component with an attribute called percent . This attribute must be an integer from 0-100 , otherwise it makes no sense.

If the developer specifies:

<my:component percent="101" />

Is there any sort of attribute validation available to detect the error and notify the developer of it in JSF?

Answer 1

一种执行此操作的方法（一定会感到有些不舒服）是检查属性在渲染器中是否具有有效值，如果该值无效，则抛出IOException 。