<bean id="processEngineConfiguration" class="org.flowable.engine.impl.cfg.StandaloneProcessEngineConfiguration"> <property name="dataSource" ref="dataSource" /> <property name="databaseSchemaUpdate" value="true" /> <property name="enableDatabaseEventLogging" value="true" /> </bean> 我把这段代码加进去，但是并没有成功开启日志功能，想请教一下！
