If you are developing a web application you can do so using a lot of libraries and technologies. The first and the foremost criteria is the features that you need for your web application. Based on your requirement you can choose the technology and the model in which you want to develop your web application.

You could use a native XML database like eXist if you need work extensively with XML database. There are libraries meant for manipulating the XML documents like DOM, JAXP, and JAXB.

Libraries like dom4j and JDOM can also be used for working with your XML documents. With these libraries you can create an XML file, edit an XML file and manipulate them and transform them in other forms.

If serializing the java classes to XML is needed you can go for library like XStream. A simple search on the internet would provide you link to all these libraries and the best of them is that all are open source. So there is nothing wrong in trying these libraries for your web application and many developers are using them.

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