ECS: Dynamically create specific Object from Classname

I am looking to create a specific type of Component based on a String in an XML-file.

This can be done with

clazzName = "NameComponent";
Class.forName("my.package.x.y.z." + clazzName).newInstance();

In the application I am looping through a list of clazzNames.

However, this gets pretty complicated once param-constructors come into play. Especially if everything is stored in XML files.

Is there a cleaner method without having to give the package information and without having to worry about constructor arguments?

I am open for suggestions on different technologies than XML, if that lets me use proper parameters and does not need package information of the class.