服务器重启后实体BEAN写入数据后MYSQL中原数据被覆盖了事怎么回事啊

Question

JBOSS服务器重启后实体BEAN写入数据后MYSQL中原数据被覆盖了事怎么回事啊？请教高手

Answer 1

<?xml version="1.0" encoding="UTF-8"?>
<persistence>
   <persistence-unit name="titan">
      <jta-data-source>java:/MySqlDS</jta-data-source><property name="hibernate.hbm2ddl.auto" value="create-drop" />
      <properties>
         
      </properties>
   </persistence-unit>
</persistence>我的持久化的xml文件