Is there a better way of obtaining an object's field getters other than java reflection api or i am misusing PropertyDescriptor's getReadMethod?

Context:

I am building an Excel document in a generic way with data i receive from a SOAP service endpoint. I receive the data as a List and i have the model (JavaBeans) for every Object i receive according to the method called. So I set the first row of the sheet as the header from the object's fields (getDeclaredFields). Then i go on filling up the column row by row with values from the list of objects.

The problem:

I haven't found a workable way of getting the object's field values. I have tried using the getters with the java reflection API with something like this answer's http://ift.tt/1yLzu1Q findGetterName , findGetter however the PropertyDescriptor's getName sometimes is a different letter case from the field name as obtained from the class's getDeclaredFields.

Let's say i overcome this by capitalizing both names, the getReadMethod stil fails - doesn't seem to find getters for the fields which use the is prefix (i.e boolean fields). I don't know if i am misusing it or it is a bug (debugging the getReadMethod appears to only work with the get prefix, even though it appears to handle the is prefix case for booleans).

Considering the fact the fields aren't accesible outside of the object's package, therefore solely through invoking getters.

Is there a better way of obtaining the object's field getters or i am missing something with the getter methods?