This example assumes the following class is already on your CLASSPATH:
Here is an example of using DOM4J with Groovy to process an existing XML file:
DOM4J also supports a streaming mode which lets you manually prune parts of the DOM tree during processing to facilitate processing large documents. Here is an example which uses DOM4J in that mode:
We could have also performed a hybrid approach which pruned away parts of the tree we weren't interested in and then performed tree-walking/navigation style coding after that.