Extracting child nodes data from given node
I want to use DOM4j for parsing xml file in Java.
I have this XML as an example:
<request method="POST" url="/devices/test/planner" body="*">
<response statusCode="200">
<header>
<headerParameters>
<headerParameter name="Content-Type">
Content-Type=application/xml
</headerParameter>
</headerParameters>
</header>
<body>booking created!</body>
</response>
</request>
Given the request (first node) node, how can I extract the child nodes data?
For example getting the <response> status code, or the <headerParameter> name attributes?
Answer
Assuming you get the "request" node as an Element then you can do something like this:
Element response = (Element) request.elements().get(0);
int statusCode = Integer.parseInt(response.attribute("statusCode"));
If you want to traverse the children recursively then you'll have to write iterative (or recursive) code to visit each element in the list returned by the elements() method.
[Edit] You can also use XPath to extract the specific items you're looking for:
int statusCode = Integer.parseInt(
request.selectSingleNode("response/@statusCode").getText());
String firstHeaderName =
request.selectSingleNode(
"response/headerParameters/headerParameter/@name").getText();