SSH插入数据，报空指针？？？
SSH做了一个小例子，save的时候报空指针，主要是hibernate封装jdbc时报空指针，代码如下：
ACTION：UserService userService = new UserService();
UserDao userDao = new UserDao();
User user = new User();
user.setName(name);
user.setPassword(password);
user.setEmail(email);
user.setPhone(phone);
user.setCompany(company);
user.setAddress(address);
user.setCreateTime(new Date());
user.setModificationTime(new Date());
37行-------------userDao.save(user）-------------------------------------------
暂时没调用service，dao的代码：
@Repository
public class UserDao extends HibernateDao<User> {
}
-------------------------------------------
HibernateDao里面的save部分代码：
public void save(T o) {
getHibernateTemplate().saveOrUpdate(o);
}
--------------------------------------------
spring.xml：
<context:annotation-config />
<context:component-scan base-package="com.shop.dao" />
<context:component-scan base-package="com.shop.service" />
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${jdbc.driverClassName}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="minPoolSize" value="5"/>
<property name="maxPoolSize" value="30"/>
<property name="acquireIncrement" value="5"/>
<property name="maxIdleTime" value="120"/>
<property name="maxStatements" value="100"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="com.shop.entity" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.format_sql">false</prop>
<prop key="hibernate.bytecode.use_reflection_optimizer">true</prop>
<prop key="hibernate.hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.jdbc.use_streams_for_binary">true</prop>
<prop key="hibernate.jdbc.fetch_size">50</prop>
<prop key="hibernate.jdbc.batch_size">50</prop>
<prop key="hibernate.autoReconnect">true</prop>
</props>
</property>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory"><ref bean="sessionFactory"/></property>
</bean>
<!-- 支持@Transactional -->
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
<!-- 支持@AspectJ -->
<aop:aspectj-autoproxy />
--------------------------------------
报错的代码就是空指针，没头绪啊：
java.lang.NullPointerException
com.shop.dao.base.HibernateDao.save(HibernateDao.java:672)
com.shop.action.RegisterAction.execute(RegisterAction.java:37)
前辈们帮帮忙看看。。。愁死我了
[解决办法]
用了Spring 后， 你的dao 还能new 吗？ 都是有容器注入的。
首先在你检查了配置无误后，是这样的到dao
如果你的是个例子试一试下面的。
BeanFactory bf = new ClassPathXmlApplicationContext("applicationContext.xml");
IUserDao udao= (也许这里是你的接口)bf.getBean("dao的名字");
