java中前台可以修改数据成功,但是数据却不能更新到数据库中。

Question

在前台修改了数据成功后，可是数据库的数据却没有更新，还是以前的数据。
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- SQL dialect -->
org.hibernate.dialect.MySQLDialect

com.mysql.jdbc.Driver


<![CDATA[
jdbc:mysql://192.168.1.99:3306/hsf_sys_db?useUnicode=true&characterEncoding=utf8
]]>

root
pass123
hsf_sys_db

    <property name="hbm2ddl.auto">update</property>
    <property name="show_sql">false</property>
    <property name="format_sql">true</property>  

    <!-- hibernat entity -->
    <mapping resource="com/boryou/entity/User.hbm.xml" />
    <mapping resource="com/boryou/entity/Product.hbm.xml" />
    <mapping resource="com/boryou/entity/Evaluate.hbm.xml" />
    <mapping resource="com/boryou/entity/Brand.hbm.xml" />
    <mapping resource="com/boryou/entity/BrandFenlei.hbm.xml" />
    <mapping resource="com/boryou/entity/Industry_news.hbm.xml" />
    <mapping resource="com/boryou/entity/directory.hbm.xml" />
    <mapping resource="com/boryou/entity/Policy.hbm.xml" />
    <mapping resource="com/boryou/entity/Academic.hbm.xml" />
    <mapping resource="com/boryou/entity/Company.hbm.xml" />

    <!-- ***************************************************** -->
    <mapping resource="com/boryou/post/domain/BBSAccount.hbm.xml"/>
    <mapping resource="com/boryou/post/domain/BBSInfo.hbm.xml"/>
    <mapping resource="com/boryou/post/domain/BoardInfo.hbm.xml"/>
    <mapping resource="com/boryou/post/domain/HistoryRecord.hbm.xml"/>
</session-factory>

Answer 1

持久层用的是什么技术，是否需要‘提交’动作？