Question

How can I remove leading/trailing white space before/while marshalling in JAXB?

Answer 1

You could use CollapsedStringAdapter:

public class MyClass {

   @XmlJavaTypeAdapter(CollapsedStringAdapter.class) 
   private String field;

}

This adapter removes leading and
trailing whitespaces, then truncate
any sequnce of tab, CR, LF, and SP by
a single whitespace character ‘ ‘.