I've set up a small project using Struts 2, Tomcat, Eclipselink and MySQL, which needs to store some special characters in the database using UTF-8. I set up the database tables as "utf8_unicode_ci". The EclipseLink persistance.xml file looks like this:
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/xxxxxx?useUnicode=true&characterEncod‌​ing=UTF-8" />
<property name="javax.persistence.jdbc.user" value="yyyyyyyy" />
<property name="eclipselink.logging.level" value="FINE"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
<property name="eclipselink.ddl-generation.output-mode" value="sql-script"/>
<property name="eclipselink.create-ddl-jdbc-file-name" value="datastore-create.sql"/>
<property name="eclipselink.drop-ddl-jdbc-file-name" value="datastore-drop.sql"/>
<property name="eclipselink.application-location" value="/home/richardh/dddd/"/>
<property name="eclipselink.deploy-on-startup" value="false"/>
<property name="javax.persistence.jdbc.password" value="zzzzzzz"/>
</properties>
When special characters are entered through the app, the EclipseLink logs show that the special characters are in the statement as it is logged. However, they aren't in the database correctly. (They show up as "?".) When I take the same statement and manually run it against the database, it works fine. This leads me to believe it's a driver issue, but it looks to me like the setup for the driver URL is also right. If anyone has any ideas, I'd appreciate them.
Thanks,
Richard