XOM getting attribute from Node?

问题

Shouldn't something like this work?

Assuming a document formatted as such:

<root>
   <element id = "a"></element>
</root>

Node node = doc.query("/root/element").get(0);
String id = node.getDocument().getRootElement().getAttribute("id");

When I print the value of the root element, it looks as if this should work. What's failing, here?

回答1:

Cast your node to an Element, and you're good to go.

回答2:

node.getDocument().getRootElement() at this point you have the element which does not have an attribute "id".

Try node.getAttribute("id") instead ? (assuming node is not null)

来源：https://stackoverflow.com/questions/2363599/xom-getting-attribute-from-node