The answer showed at http://stackoverflow.com/questions/33232260/temporaltemporaltype-date-with-oracle-12 says:

"Workaround #2: Download and apply patch 19297927 from MOS: (My Oracle Support)

Click on Patches & Updates tab.
Enter the above patch number and Click on Search.
Click on the patch number corresponds to your platform from the list
Click on Download button to download the patch.
Read any applicable notes before downloading, then click the Download button.

After patching replace ojdb7.jar in %Oracle_Home%\oracle_common\modules\oracle.jdbc_12.1.0 and add -Doracle.jdbc.DateZeroTime=true to your JVM Arguments"

Has you tried that?