我是 Spring 新手，我想注入 sessionFactory 并且它根本不起作用。我正在启动一个 Web 服务器 Jetty，然后加载上下文。在我启动 GWT Web 应用程序后，我在服务器端进行调用并尝试获取一些信息，但我得到一个空指针。根本没有错误，因此很难知道问题出在哪里。我知道它应该可以工作，因为我看到它在我之前工作过的一个项目上工作。任何帮助将不胜感激。（对不起我可能英语不好）
这是 context.xml ：
<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-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/tx http://www.springframework.org/schema
/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema
/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema
/security/spring-security-3.0.xsd">
<!-- Standard spring initialization -->
<context:component-scan base-package="com.test">
</context:component-scan>
<tx:annotation-driven transaction-manager="txManager"/>
<!-- Connection to the database-->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-
method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="123456789" />
</bean>
<!-- Hibernate session factory-->
<bean id="jpaSessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.domain"/>
<property name="namingStrategy" >
<bean class="org.hibernate.cfg.ImprovedNamingStrategy" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<!-- Hibernate session factory -->
<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="jpaSessionFactory" />
</bean>
</beans>
这是主要的：
public static void main(String[] args) {
ContextHandlerCollection contexts = new ContextHandlerCollection();
contexts.setHandlers(new Handler[]
{ new AppContextBuilder().buildWebAppContext()});
final JettyServer jettyServer = new JettyServer();
jettyServer.setHandler(contexts);
Runnable runner = new Runnable() {
@Override
public void run() {
new ServerRunner(jettyServer);
}
};
EventQueue.invokeLater(runner);
new ClassPathXmlApplicationContext("context.xml");
}
这是我想要注入的类 Test ：
@Component("test")
public class TEST{
@Resource(name="jpaSessionFactory")
private SessionFactory sessionFactory;
@SuppressWarnings("unchecked")
@Transactional(readOnly = true)
public List<Personne> getPersonnes() {
Session s = sessionFactory.getCurrentSession();
Query query = s.createQuery("from Person");
return query.list();
}
}
这是应用程序的服务器端（未完全显示）
/*** The server side implementation of the RPC service.
*/
@SuppressWarnings("serial")
public class GreetingServiceImpl extends RemoteServiceServlet implements
GreetingService {
@Resource
private TEST t;
public String greetServer(String input) throws IllegalArgumentException {
// Verify that the input is valid.
if (!FieldVerifier.isValidName(input)) {
// If the input is not valid, throw an IllegalArgumentException
back to
// the client.
throw new IllegalArgumentException(
"Name must be at least 4 characters long");
}
t.getPersons(); // NULL pointer here
…………………………………………………………………………………………………………
MySQL 表是按应有的方式创建的，因此所有扫描似乎都有效。
谢谢
鲍勃