Don't understand ant-deploy.xml how it works with Netbeans IDE 8.2 etc

[tangara goh]

Recently, I downloaded a web app which uses Ant-deploy.xml so I open it with Netbeans IDE 8.2.

The problem is that whenever I changed something, for eg. the driver uses one which doesn't work for MYSQL version 8, it will gives me the message that the persistence.xml cannot be deleted when I did a clean and build.

Furthermore, after I changed the persistence xml, it keeps giving me the old message from Tomcat.server log which doesn't apply any more.

<quote>
<"jdbc:mysql://localhost:3306/music_store?autoReconnect=true&UseLegacyDatetimeCode=false&serverTimezone=UTC&useSSL=False"/>
</quote>

And here's the error message:

Caused by: Exception [EclipseLink-30009] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while trying to load persistence unit at url: file:/C:/Users//MusicStore-master/MusicStore-master/build/web/WEB-INF/classes/
Internal Exception: Exception [EclipseLink-30004] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while processing persistence.xml from URL: file:/C:/Users//MusicStore-master/MusicStore-master/build/web/WEB-INF/classes/
Internal Exception:
(1. The reference to entity "ampUseLegacyDatetimeCode" must end with the ';' delimiter.)

How do I refresh the tomcat directory in this case?

Another strange thing is that Tomcat is residing at AppData Folder!  And so any role etc has to be specified in the tomcat-user.xml there!

I am unfamiliar with ant-deploy.xml.

Can I know if I were to delete ant-deploy.xml will it affect running the app to see how it run?

[Knute Snortum]

Did you try fixing the problem described in the error message?

Exception Description: An exception was thrown while processing persistence.xml from URL: file:/C:/Users//MusicStore-master/MusicStore-master/build/web/WEB-INF/classes/
Internal Exception:
(1. The reference to entity "ampUseLegacyDatetimeCode" must end with the ';' delimiter.)  

[tangara goh]

Knute Snortum wrote:Did you try fixing the problem described in the error message?

Exception Description: An exception was thrown while processing persistence.xml from URL: file:/C:/Users//MusicStore-master/MusicStore-master/build/web/WEB-INF/classes/
Internal Exception:
(1. The reference to entity "ampUseLegacyDatetimeCode" must end with the ';' delimiter.)  

Hi Knute,

I am not sure where lies the problem cos my the other web app can be connected to MYSQL without a hitch so not sure why the same URL cannot work here in persistence.xml.

Here's the URL:

      <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/music_store?autoReconnect=true&UseLegacyDatetimeCode=false&serverTimezone=UTC&useSSL=False">

[Knute Snortum]

That is a problem with ampersand entities.  Your intention of escaping the "&" character is correct but you didn't quite do it correctly.  An escaped & character in XML is:

   &amp;

Notice the trailing semicolon (;).  This is why the error message thinks that you have an ampersand entity of "ampUseLegacyDatetimeCode".

[tangara goh]

I managed to get it now.  I just simply remove &amp.