Xpath：如果存在子代，如何在xpath中选择父注释的值

Question

I try to build a html table with javascript out of a xml

Therefore I need the value of a parent element from a different ancestor called "name" with xpath, if a child with eg //host exists

I need only the channel name out of the xpath:

"/serverConfiguration/channels/channel/name"

where the child

"/serverConfiguration/channels/channel/sourceConnector/properties/listenerConnectorProperties/host"

exists

Answer 1

就XPath而言，似乎您只需要谓词/serverConfiguration/channels/channel[.//host]/name或/serverConfiguration/channels/channel[sourceConnector/properties/listenerConnectorProperties/host]/name 。