hibernate3.2由hbm文件生成pojo和ddl

最新推荐文章于 2025-08-11 20:54:36 发布

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最新推荐文章于 2025-08-11 20:54:36 发布

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文章标签： java 数据库

原文链接：http://www.cnblogs.com/wllyy189/archive/2008/12/12/1353853.html

本文介绍如何使用Hibernate框架进行数据库操作，包括项目搭建步骤、配置文件详解及自动化生成Java源代码和数据库模式。

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准备:
1.apache-ant-1.7.0.
2.hibernate-3.2.1.ga.zip,HibernateTools-3.2.1.ga.zip.
3.数据库的jdbc驱动程序,我使用的是mysql,驱动程序为mysql-connector-java-5.1.6。

项目布置:
1.建立Project-Name文件夹,其下建立:config,java,schema,lib文件夹以及build.xml文件.
2.加入jar包:hibernate3.jar,hibernate-tools.jar,freemarker.jar,mysql-connector-java.jar,...
3.src/hibernate.cfg.xml:

<?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">

<hibernate-configuration>
<session-factory>
  <property name="connection.username">root</property>
  <property name="connection.password">cosmo</property>
  <property name="connection.url">jdbc:mysql://localhost:3306/MasteryHibernate</property>
  <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
  <mapping resource="chapter3/Customer.hbm.xml" />
</session-factory>
</hibernate-configuration>

4.src/your-package/Customer.hbm.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="chapter3.Customer" table="CUSTOMERS">
        <meta attribute="class-description">
            Represents a single customer.
            @author Cosmo
        </meta>

        <meta attribute="class-scope">public</meta>

        <id name="id" type="long" column="ID">
            <meta attribute="scope-set">protected</meta>
            <generator class="native" />
        </id>

        <property name="name" type="string">
            <meta attribute="use-in-tostring">true</meta>
            <column name="NAME" length="15" not-null="true" unique="true" />
        </property>

        <property name="registeredTime" type="timestamp">
            <meta attribute="field-description">When the customer was registered</meta>
            <meta attribute="use-in-tostring">true</meta>
            <column name="REGISTERED_TIME" index="IDX_REGISTERED_TIME"
                sql-type="timestamp" />
        </property>

        <property name="age" type="int">
            <meta attribute="field-description">How old is the customer</meta>
            <meta attribute="use-in-tostring">true</meta>
            <column name="AGE" check="AGE>10" not-null="true" />
        </property>

        <property name="sex" type="char" column="SEX" />

        <property name="married" type="boolean" column="IS_MARRIED">
            <meta attribute="field-description">Is the customer married</meta>
            <meta attribute="use-in-tostring">true</meta>
        </property>

        <property name="description" type="string">
            <meta attribute="use-in-tostring">true</meta>
            <column name="DESCRIPTION" sql-type="text" />
        </property>
    </class>
</hibernate-mapping>

5.build.xml:

<?xml version="1.0" encoding="UTF-8"?>

<project name="AboutHibernateTools" default="compile">
    <description>
            AboutHibernateTools
    </description>

    <property name="source.root" value="./src" />
    <property name="class.root" value="./classes" />
    <property name="lib.dir" value="./lib" />
    <property name="schema.dir" value="./schema" />

    <path id="project.class.path">
        <pathelement location="${class.root}" />
        <fileset dir="${lib.dir}">
            <include name="*.jar" />
        </fileset>
    </path>

    
    <target name="run" depends="hbm2ddl" description="Run a Hibernate sample">
        <java classname="chapter3.BusinessService" fork="true">
            <classpath refid="project.class.path" />
        </java>
    </target>

    
    <target name="hbm2ddl" depends="compile" description="Generate DB schema from the O/R mapping files">
        <mkdir dir="${schema.dir}" />
        <taskdef name="hbm2ddl" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="project.class.path" />
        <hbm2ddl destdir="${schema.dir}">
            <configuration configurationfile="${class.root}/hibernate.cfg.xml" />
            <hbm2ddl export="true" console="false" create="true" update="false" drop="false" outputfilename="schema.sql" />
        </hbm2ddl>
    </target>

    
    <target name="compile" depends="hbm2java" description="Chapter3">
        <javac srcdir="${source.root}" destdir="${class.root}" debug="on" optimize="off" deprecation="on">
            <classpath refid="project.class.path" />
        </javac>
    </target>

    
    <target name="hbm2java" depends="prepare" description="Generate Java source from the O/R mapping files">
        <taskdef name="hbm2java" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="project.class.path" />
        <hbm2java destdir="${source.root}">
            <configuration configurationfile="${class.root}/hibernate.cfg.xml" />
            <hbm2java jdk5="true" />
        </hbm2java>
    </target>

    
    <target name="prepare">
        <delete dir="${class.root}" />
        <mkdir dir="${class.root}" />

        <copy todir="${class.root}">
            <fileset dir="${source.root}">
                <include name="**/*.properties" />
                <include name="**/*.hbm.xml" />
                <include name="**/*.cfg.xml" />
            </fileset>
        </copy>
    </target>

</project>

转载于:https://www.cnblogs.com/wllyy189/archive/2008/12/12/1353853.html