升级到 Java 1.8 后，控制台中未打印的查询。 Hibernate 版本是 5，jboss 是 7

Question

When debugging or executing the application queries are not getting printed in the console. I am using java 1.8, hibernate 5 and jboss7. For logging purpose log4j-1.2.17.jar is used. Is this problem due to any configuration or is it because of the log4j jar version issue?

Answer 1

Please check the property in your hibernate config xml

<!--hibernate.cfg.xml -->
<property name="show_sql">true</property>

for additional thing you can set these properties

Format the generated SQL statement to make it more readable, but takes up more screen space -

<!--hibernate.cfg.xml -->
<property name="format_sql">true</property>

Hibernate will put comments inside all generated SQL statements to hint what's the generated SQL trying to do -

<!--hibernate.cfg.xml -->
<property name="use_sql_comments">true</property>

From log4j side check this (for detailed logs - set it as DEBUG)

log4j.logger.org.hibernate=info

in XML version of log4j config file:

<logger name="org.hibernate">
  <level value="info"/> 
</logger>

Answer 2

This is because hiberante has cached the results and not going to the database to fetch the records.

Try a different record and you should see the select statement on the console