使用基于JPA注释的实体转换成数据库schema

第一步：添加hibernate3-maven-plugin到pom.xml中

<plugin>                
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>hibernate3-maven-plugin</artifactId>
                <version>2.2</version>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>hbm2ddl</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <components>
                        <component>
                            <name>hbm2ddl</name>
                            <implementation>jpaconfiguration</implementation>
                        </component>
                    </components>
                    <componentProperties>
                        <persistenceunit>Default</persistenceunit>
                        <outputfilename>schema.ddl</outputfilename>
                        <drop>false</drop>
                        <create>true</create>
                        <export>false</export>
                        <format>true</format>
                    </componentProperties>
                </configuration>
            </plugin>

第二步：在classpath目录中添加META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8"?><persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
    <persistence-unit name="Default" transaction-type="RESOURCE_LOCAL">
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password" value="root" />
            <property name="hibernate.connection.url" value="jdbc.mysql://localhost:3306/taman?useUnicode=true&amp;characterEncoding=UTF-8" />
            <property name="hibernate.max_fetch_depth" value="3" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="update"/>
        </properties>
    </persistence-unit>
</persistence>

第三步：运行以下命令生成schema

mvn hibernate3:hbm2ddl