By default, the marshaller implementation of the JAXB usually escapes characters. To change this default behavior you will have to Write a class that implements the com.sun.xml.bind.marshaller.CharacterEscapeHandler
interface.
set that handler in the Marshaller
CharacterEscapeHandler escapeHandler = NoEscapeHandler.theInstance;
marshaller.setProperty("com.sun.xml.bind.characterEscapeHandler", escapeHandler);
You can have a look at samples provided with JAXB, character escaping sample
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