进化中Hibernate3脚本

在Hibernate有一些相当方便的辅助工具: hbm2java,hbm2ddl, 数据库的逆向工程,Mapping Editor.

这些任务可以通过Ant构建完成,Hibernate提供了Ant Tasks及其构建脚本.由于Hibernate从2到3进行了重大重构,且包重新做了组织,因此Ant构建脚本也发生了巨大变化.在2中脚本样式为:

<?xml version="1.0"?>
<project name="anto builder"
         default="db" basedir=".">

  <!-- Set up properties containing important project directories -->
  <property name="source.root" value="src"/>
  <property name="class.root" value="classes"/>
  <property name="lib.dir" value="lib"/>
  <property name="data.dir" value="data"/>

  <!-- Set up the class path for compilation and execution -->
  <path id="project.class.path">
      <!-- Include our own classes, of course -->
      <pathelement location="${class.root}" />
      <!-- Include jars in the project library directory -->
      <fileset dir="${lib.dir}">
        <include name="*.jar"/>
      </fileset>
  </path>

  <target name="db" description="Runs HSQLDB database management UI
against the database file--use when application is not running">
      <java classname="org.hsqldb.util.DatabaseManager"
            fork="yes">
         <classpath refid="project.class.path"/>
         <arg value="-driver"/>
         <arg value="org.hsqldb.jdbcDriver"/>
         <arg value="-url"/>
         <arg value="jdbc:hsqldb:${data.dir}/music"/>
         <arg value="-user"/>
         <arg value="sa"/>
      </java>
  </target>

  <!-- Teach Ant how to use Hibernate's code generation tool -->
  <taskdef name="hbm2java"
           classname="net.sf.hibernate.tool.hbm2java.Hbm2JavaTask"
           classpathref="project.class.path"/>

  <!-- Generate the java code for all mapping files in our source tree -->
  <target name="codegen"
          description="Generate Java source from the O/R mapping files">
    <hbm2java output="${source.root}">
      <fileset dir="${source.root}">
        <include name="**/*.hbm.xml"/>
      </fileset>
    </hbm2java>
  </target>

  <!-- Create our runtime subdirectories and copy resources into them -->
  <target name="prepare" description="Sets up build structures">
    <mkdir dir="${class.root}"/>

    <!-- Copy our property files and O/R mappings for use at runtime -->
    <copy todir="${class.root}" >
      <fileset dir="${source.root}" >
        <include name="**/*.properties"/>
        <include name="**/*.hbm.xml"/>
      </fileset>
    </copy>
  </target>

  <!-- Compile the java source of the project -->
  <target name="compile" depends="prepare"
          description="Compiles all Java classes">
    <javac srcdir="${source.root}"
           destdir="${class.root}"
           debug="on"
           optimize="off"
           deprecation="on">
      <classpath refid="project.class.path"/>
    </javac>
  </target>

  <!-- Generate the schemas for all mapping files in our class tree -->
  <target name="schema" depends="compile"
          description="Generate DB schema from the O/R mapping files">

    <!-- Teach Ant how to use Hibernate's schema generation tool -->
    <taskdef name="schemaexport"
             classname="net.sf.hibernate.tool.hbm2ddl.SchemaExportTask"
             classpathref="project.class.path"/>

    <schemaexport properties="${class.root}/hibernate.properties"
                  quiet="no" text="no" drop="no">
      <fileset dir="${class.root}">
        <include name="**/*.hbm.xml"/>
      </fileset>
    </schemaexport>
  </target>
</project>

在3中,构建脚本为:

<?xml version="1.0" encoding="GBK"?>
<project name="Hibernate" default="anthbm2java" basedir=".">
 <property name="src.dir" value="./src" />
 <property name="class.dir" value="./bin" />
 <property name="lib.dir" value="D:/eclipse/plugins/org.hibernate.eclipse_3.0.0.alpha4/lib" />
 <path id="project.class.path">
  <fileset dir="${lib.dir}">
   <include name="*.jar"/>
  </fileset>
  <pathelement location="${class.dir}" />
 </path>
 <path id="tasks.classpath">
  <fileset dir="${lib.dir}">
   <include name="*.jar"/>
  </fileset>
  <pathelement location="${class.dir}" />
 </path>

 <target name="anthbm2java">
       <taskdef name="hibernatetool" 
  classname="org.hibernate.tool.ant.HibernateToolTask" 
  classpathref="tasks.classpath"/>
       <hibernatetool destdir="${class.dir}">
        <configuration configurationfile="hibernate.cfg.xml" > 
           <fileset dir="${src.dir}">
             <include name="**/*.hbm.xml" />
           </fileset>  
         </configuration>
         <hbm2ddl export="false" console="false" create="true" update="false" drop="false" outputfilename="broad.sql" delimeter=";"/>  其中的delimeter属性在Hibernate-Tool 3 A5版本中不支持.
        <hbm2java generics="true" ejb3="false"/>
        <cfg2hbm/><hbm2doc/>
        <!--
        <cfg2cfgXml/>  这个任务在Hibernate-Tool 3 A5版本中不支持.
        -->  
       </hibernatetool>   
 </target> 
</project> 

Hibernate3构建脚本的变化
这个脚本在Eclipse中检验过.

通过这个脚本,执行了很多Hibernate辅助工具的功能,方便了开发.

关于这些内容的参考可见:

http://www.hibernate.org/hib_docs/tools/ant/  其中有些反向工程的介绍.