qxo created HTTPCLIENT-2264:
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Summary: PomUtils.addNewModule Pretty-Printing has issue on java 9+
Key: HTTPCLIENT-2264
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2264
Project: HttpComponents HttpClient
Issue Type: Bug
Reporter: qxo
*As of Java 9, the _Transformer_ class's pretty-print feature doesn't define
the actual format. Therefore, whitespace-only nodes will be outputted as well.*
This has been discussed in this [JDK bug
ticket|https://bugs.openjdk.java.net/browse/JDK-8262285?attachmentViewMode=list].
Also, [Java 9's release
note|https://www.oracle.com/java/technologies/javase/9-notes.html] has
explained this in the xml/jaxp section.
*If we want our pretty-print method to always generate the same format under
various Java versions, we need to provide a stylesheet file.*
ref：
[https://bugs.openjdk.java.net/browse/JDK-8262285?attachmentViewMode=list]
[https://www.baeldung.com/java-pretty-print-xml#pretty-printing-xml-with-the-transformer-class]
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