Hibernate hbm2ddl ant文件路径

Question

我在使用Hibernate工具生成数据库模式时遇到了问题。这是我的ant文件

<project name="Schema generator for MySQL database" basedir=".">
   <description>
 This file is used for running Hibernate Tools Ant task.
    It is used to generate database schema based on hibernate configuration
   </description>

   <path id="toolslib">
      <path location="lib/hibernate-tools.jar" />
      <path location="lib/hibernate-3.2.4.ga.jar" />
      <path location="lib/freemarker.jar" />
      <path location="lib/mysql-connector-java-5.1.13" />
      <path location="lib/dom4j-1.6.1.jar" />
      <path location="hibernate_mappings/Address.hbm.xml" />
   </path>

   <taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="toolslib" />

   <hibernatetool destdir="${build.dir}/generated">
      <classpath>
         <path location="${build.dir}/classes" />
      </classpath>
      <configuration configurationfile="hibernate.cfg.xml" />
      <hbm2ddl />
      <hbm2dao />
   </hibernatetool>
</project>

运行ant任务时出现以下错误：

C:\work\gwt_workspace\billing-cms\dao\src\main\resources\build.xml:19: org.hibernate.MappingNotFoundException:找不到资源: hibernate_mappings/Address.hbm.xml

我的文件系统路径层次结构如下：

+resources
   -hibernate_mappings
      -Address.hbm.xml
      -User.hbm.xml
      -etc..
   -hibernate.cfg.xml
   -build.xml

我在hibernate.hbm.xml中定义了如下映射：

<mapping resource="hibernate_mappings/Address.hbm.xml" />

Answer 1

你不需要Ant来做这件事。如果您只运行一个Hibernate应用程序(例如，虚拟测试或主应用程序)，它将为您运行hbm2ddl。

确保在运行时.hbm.xml文件位于Ant类路径中。也许这就是问题所在。(没有足够仔细地查看您的build.xml以了解；只是将其抛出。)

下面是一个有效的Hibernate配置示例，包括hbm2ddl。在此之后设计你的模式：

<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate?autoReconnect=true</property>
        <property name="connection.username">hibernate</property>
        <property name="connection.password">hibernate</property>
        <property name="connection.pool_size">1</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
        <property name="show_sql">true</property>
        <property name="generate_statistics">true</property>
        <property name="query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property>
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
        <property name="cache.use_minimal_puts">false</property>
        <property name="cache.use_query_cache">false</property>
        <property name="order_updates">false</property>
        <property name="hbm2ddl.auto">create-drop</property>
        <property name="current_session_context_class">thread</property>

        <mapping resource="hibernate/policy/persistence/hibernate/Person.hbm.xml"/>

    </session-factory>
</hibernate-configuration>