When the value is rendered back to the view, JSF will call the getAsString method in the render response phase.

如果该值被返回呈现在视图中，那么 JSF 将在呈现响应阶段调用 getAsString方法。

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If the value conversion fails, an error message is generated and queued in the FacesContext, where it will be displayed during the render response phase, along with any validation errors.

如果值的转换失败了，那么就会生成一个错误消息，并在FacesContext中进行排队，在产生响应的阶段会显示其中的消息，同时还会显示所有的验证错误。

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In this case, the JSF implementation cannot restore the component tree, which must be created in the Render Response phase.

在这种情况下，JSF实现不能恢复组件树，此树必须在Render Response阶段创建。

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