Javadoc
This method loads the builder class with reflection, which may generate
a
ClassNotFoundException if the class is not on the classpath.
For example,
org.apache.poi.poifs.crypt.agile.AgileEncryptionInfoBuilderis contained in the
poi-ooxml package since the class makes use of some OOXML
classes rather than using the
poi package and plain XML DOM calls.
As such, you may need to include
poi-ooxml and
poi-ooxml-schemas to load
some encryption mode builders. See bug #60021 for more information.
https://bz.apache.org/bugzilla/show_bug.cgi?id=60021