Hibernate 映射资源无法打开，因为它在 Spring + Hibernate Maven 项目中不存在

Question

我正在做一个 Spring/Hibernate 应用程序，它使用注释来自动连接服务和存储库层，并且配置更少。所有这一切似乎都成功完成，因为当我运行应用程序时，一切似乎都已正确初始化。

问题

但是，当我在 applicationContext-datasource.xml 中添加映射资源时，我收到一条错误消息，指出 SessionFactory 无法正确初始化，因为它似乎可以找到我的 pojo.hbm.xml 文件。见：

原因：java.io.FileNotFoundException：类路径资源[com/dariopardo/jfreechartdemo/pojo/Grid.hbm.xml]无法打开，因为它不存在

设置

applicationContext-datasource.xml

此文件位于 src/main/resources/META_INF/spring

  <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
    http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"
    default-autowire="byName">

  <context:annotation-config/>

  <tx:annotation-driven/>

  <context:component-scan base-package="com.dariopardo.jfreechartdemo.service">
    <context:include-filter type="annotation"
        expression="org.springframework.stereotype.Service"/>
 </context:component-scan>

 <context:component-scan base-package="com.dariopardo.jfreechartdemo.dao">
    <context:include-filter type="annotation"
        expression="org.springframework.stereotype.Repository"/>
 </context:component-scan>

 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
    <property name="url" value="jdbc:oracle:thin:@myserverhere:1521:mydb" />
    <property name="username" value="myusername" />
    <property name="password" value="mypwd" />
 </bean>

 <!-- Hibernate SessionFactory for k12-->
<!--<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource"><ref local="dataSource"/></property>
    <property name="mappingResources">
        <list>                                            
            <value>com/dariopardo/jfreechartdemo/pojo/Grid.hbm.xml</value>               
        </list>
    </property>
    <property name="hibernateProperties">
         <props>
        <prop key="hibernate.bytecode.use_reflection_optimizer">false</prop>
        <prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>
        <prop key="hibernate.cache.use_second_level_cache">true</prop>
        <prop key="hibernate.cache.region_prefix">hibernate.k12</prop>
        <prop key="hibernate.cglib.use_reflection_optimizer">false</prop>
        <prop key="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</prop>
        <prop key="hibernate.connection.pool_size">1</prop>
        <!-- <prop key="hibernate.current_session_context_class">thread</prop>  -->
        <prop key="hibernate.default_schema">K12INTEL_DW</prop>
        <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
        <prop key="hibernate.format_sql">true</prop>
        <prop key="hibernate.generate_statistics">true</prop>
        <prop key="hibernate.jdbc.batch_versioned_data">true</prop>
        <prop key="hibernate.jdbc.use_streams_for_binary">true</prop>
        <prop key="hibernate.max_fetch_depth">1</prop>
        <prop key="hibernate.proxool.pool_alias">pool_K12</prop>
        <prop key="hibernate.query.substitutions">yes 'Y', no 'N'</prop>
        <prop key="hibernate.show_sql">false</prop>
        <prop key="hibernate.transaction.auto_close_session"></prop>
        <prop key="hibernate.transaction.flush_before_completion"></prop>
        <prop key="hibernate.use_sql_comments">true</prop>
    </props>
    </property>
    <property name="eventListeners">
        <map>
            <entry key="merge">
                <bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener"/>
            </entry>
        </map>
    </property>
</bean>


<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" p:sessionFactory-ref="sessionFactory"/>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/root-context.xml
                 classpath*:META-INF/spring/applicationContext*.xml                  
    </param-value>
</context-param>

<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- Processes application requests -->
<servlet>
    <servlet-name>appServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>appServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

我的 POJO

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.dariopardo.jfreechartdemo.pojo">

<class name="Grid">
    <cache usage="read-only" />
    <id name="c1"/>
    <property name="c2"></property>
    <property name="c3"></property>
</class>

<sql-query name="studentAttendanceOver95Pct">
    <return alias="p" class="com.dariopardo.jfreechartdemo.pojo.Grid">
     <return-property name="c1" column="school"/>
     <return-property name="c2" column="at_risk"/>
     <return-property name="c2" column="not_at_risk"/>
     </return>
     My custom sql query goes here
</sql-query>   

我的 DAO 层

@Repository
public class K12DaoImpl extends HibernateDaoSupport implements K12DaoManager{

@Autowired
public K12DaoImpl(SessionFactory sessionFactory) {
    super.setSessionFactory(sessionFactory);
}

@Override
public List<Grid> getAttendanceBySchoolOver95Pct() {

    List<Grid> list =    getHibernateTemplate().findByNamedQuery("studentAttendanceOver95Pct");
    return list;
}
}

我的服务层

@Service
public class K12ManagerImpl implements K12Manager {

@Resource
private K12DaoManager k12DaoManager;

@Override
public List<Grid> studentPctAttendance() {

    return k12DaoManager.getAttendanceBySchoolOver95Pct();
}
}

如果我在 mappingResources 部分中注释 hbm.xml，一切似乎都正确连接，但只要我在映射资源部分中引入任何 hbm.xml 文件，应用程序就无法初始化。

有什么想法吗？

谢谢， - 达里奥

Answer 1

您指定了映射文件的位置：

<property name="mappingResources">
    <list>                                            
        <value>com/dariopardo/jfreechartdemo/pojo/Grid.hbm.xml</value>               
    </list>
</property>

因此它正在该目录下寻找映射文件：com/dariopardo/jfreechartdemo/pojo。创建这个目录，如果没有，把文件放在那里，它就可以工作了。

---

要清理 Spring 配置并将其与 Hibernate 分离，您可以创建一个单独的 Hibernate 配置，您可以在其中指定映射的类、映射位置等：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>  

        <mapping package="org.gitpod.startup.bank.*" />
        <mapping class="org.gitpod.startup.bank.MoneyRoll"/>

        <mapping resource="META-INF/conf/hibernate/mapping/startup-bank-named-queries.xml"/>

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

然后在您的 Spring 配置中，将 sessionFactory bean 指向上述配置位置：

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation" value="classpath:./META-INF/conf/hibernate/startup-hibernate-config.xml" />
    <property name="hibernateProperties"> ... </property>
</bean>

这样可以更轻松地管理位置和会话工厂配置。您可以查看工作示例here