I'm making the connection with mysql in the code below,
This is the
servlet file that does the update
when it run the project leaves in the browser:
>HTTP Status 500 - Internal Server Error type Exception report messageInternal Server Error description: The server encountered an internal error that prevented it from fulfilling this request. exception **java.lang.NullPointerException**
>note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition
when it debug the project no error appears.