Questions about spring-tx in Spring MVC application step-by-step tutorial

When I switched the database to mysql 5 with mysql-connector-java-5.1.6, something wrong happened with messages below:

java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed

and the transaction config part in applicationContext:
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="save*"/>
<tx:method name="*" read-only="true"/>
</tx:attributes>
</tx:advice>
OR
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="*" read-only="true"/>
<tx:method name="save*" propagation="REQUIRED"/>

</tx:attributes>
</tx:advice>

when I modified it (explicitly map the get* method) to:
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="save*"/>
<tx:method name="get*" read-only="true"/>
</tx:attributes>
</tx:advice>
EVEN
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
<tx:method name="save*" read-only="true"/>
</tx:attributes>
</tx:advice>
Everything is Ok again. I tried different orders of the read and wirte config and it seems irrelevant. I think maybe there's something wrong with the precedence, the wildcard character (*) seems override the other identifiers.
Maybe the tutorial didn't use it properly.