hibernate - 如何配置 hbm2java 和 hbm2dao 将包名添加到生成的类中

Question

我正在尝试使用 maven 配置 hbm2java 来生成 POJO 类和 DAO 对象。我正在处理的问题之一是未生成包名称。我为此使用以下 pom:

<execution>
    <id>hbm2java</id>
    <phase>generate-sources</phase>
    <goals>
        <goal>hbm2java</goal>
    </goals>
    <inherited>false</inherited>
    <configuration>
        <components>
            <component>
                <name>hbm2java</name>
                <implementation>configuration</implementation>
            </component>
        </components>
        <componentProperties>
            <packagename>package.name</packagename>
            <configurationfile>target/hibernate3/generated-mappings/hibernate.cfg.xml</configurationfile>
        </componentProperties>
    </configuration>
</execution>

但是生成的代码以以下内容开头:

// default package
// Generated 2010-05-17 13:11:51 by Hibernate Tools 3.2.2.GA

/**
 * Messages generated by hbm2java
 */
public class Messages  implements java.io.Serializable {

有没有办法强制maven生成package中定义的package部分？

更新:

这是我的 hibernate.cfg.xml，也是由 hibernate-tools (hbm2cfgxml) 自动生成的:

<?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="hibernate.c3p0.max_size">20</property>
        <property name="hibernate.c3p0.max_statements">50</property>
        <property name="hibernate.c3p0.min_size">5</property>
        <property name="hibernate.c3p0.timeout">1800</property>
        <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
        <property name="hibernate.connection.password">password</property>
        <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/db</property>
        <property name="hibernate.connection.username">username</property>
        <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
        <mapping resource="package/name/Messages.hbm.xml" />
    </session-factory>
</hibernate-configuration>

Answer 1

为了以防万一，这里是 hibernate3-maven-plugin 的自下而上方法的工作配置:

  <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>hibernate3-maven-plugin</artifactId>
    <version>2.2</version>
    <executions>
      <execution>
        <id>generate-xml-files</id>
        <phase>generate-resources</phase>
        <goals>
          <goal>hbm2hbmxml</goal>
          <goal>hbm2cfgxml</goal>
        </goals>
      </execution>
      <execution>
        <id>generate-entities</id>
        <phase>generate-sources</phase>
        <goals>
          <goal>hbm2java</goal>
        </goals>
      </execution>
    </executions>
    <configuration>
      <components>
        <component>
          <name>hbm2hbmxml</name>
          <implementation>jdbcconfiguration</implementation>
          <outputDirectory>target/classes</outputDirectory>
        </component>
        <component>
          <name>hbm2cfgxml</name>
          <implementation>jdbcconfiguration</implementation>
          <outputDirectory>target/classes</outputDirectory>
        </component>
        <component>
          <name>hbm2java</name>
          <implementation>configuration</implementation>
          <outputDirectory>target/generated-sources/hibernate3</outputDirectory>
        </component>
      </components>
      <componentProperties>
        <propertyfile>src/main/resources/database.properties</propertyfile>
        <jdk5>true</jdk5>
        <ejb3>false</ejb3>
        <packagename>com.mycompany.myapp</packagename>
        <format>true</format>
        <haltonerror>true</haltonerror>
      </componentProperties>
    </configuration>
    <dependencies>
      <dependency>
        <groupId>org.apache.derby</groupId>
        <artifactId>derby</artifactId>
        <version>10.5.3.0_1</version>
      </dependency>
    </dependencies>
  </plugin>

这是我的src/main/database.properties的内容文件:

hibernate.connection.driver_class=org.apache.derby.jdbc.EmbeddedDriver
hibernate.connection.url=jdbc:derby:./derbyDBs/EMPLDB
hibernate.connection.username=APP
hibernate.connection.password=APP
hibernate.dialect=org.hibernate.dialect.DerbyDialect

#workaround for http://opensource.atlassian.com/projects/hibernate/browse/HBX-1145
hibernate.connection.autocommit=true 

此设置:

1. 生成*.hbm.xml在target/classes (随包)generate-resources期间.
2. 生成 hibernate.cfg.xml在target/classes包含映射文件的条目。
3. 根据 target/generated-sources/hibernate3 中的映射生成实体(我建议遵循生成源的 target/generated-sources/<tool> 约定，以便 IDE 自动检测到它们)。

这是 clean compile 的结果针对具有两个表的示例数据库:

$ mvn clean compile...$ tree target/target/├── classes│   ├── com│   │   └── mycompany│   │       └── myapp│   │           ├── Department.class│   │           ├── Department.hbm.xml│   │           ├── Employee.class│   │           └── Employee.hbm.xml│   ├── database.properties│   └── hibernate.cfg.xml└── generated-sources    └── hibernate3        └── com            └── mycompany                └── myapp                    ├── Department.java                    └── Employee.java