java 从支持 bean 访问 JSF 组件标记属性值
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Accessing JSF components tag attribute values from a backing bean
提问by ali honarmand
I need to access a components tag attribute like:
我需要访问一个组件标签属性,如:
<h:inputtext id="input_age"/>
from a backing bean, like:
来自支持 bean,例如:
public class UserInfo {
String inputAgeId;
public UserInfo() {
inputAgeId = { /*code to access component tag attribute*/ }.getStyleClass();
}
}
回答by Pablo
UIViewRoot view = FacesContext.getCurrentInstance().getViewRoot();
You can then use view.find("component_id")to get the right component. Once you have the component, you can use getAttributes()to get a Map<String, Object>
with all the attributes of the component.
然后您可以使用view.find("component_id")来获取正确的组件。一旦你有了组件,你就可以使用getAttributes()来获取Map<String, Object>
组件的所有属性。
If you are accessing always the same compent, you can bind it to the backing beaninstead.
如果您始终访问相同的组件,则可以将其绑定到支持 bean。