我尝试使用Hibernate 4.1.6和Spring 3.0.5创建Java程序 . 当我运行我的应用程序时抛出NULLPOINT EXCEPTION . 请帮助我的人
- SpringBeans.xml:
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd“>
<!-- Database Configuration -->
<import resource="config/spring/DataSource.xml"/>
<import resource="config/spring/HibernateSessionFactory.xml"/>
<!-- Beans Declaration -->
<import resource="config/spring/UserBeans.xml"/>
2. HibernateSessionFactory.xml
<property name="dataSource">
<ref bean="dataSource"/>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/model/TblUser.hbm.xml</value>
</list>
</property>
- DataSource.xml
WEB-INF /班/配置/数据库/属性/ database.properties
- database.properties
jdbc.driverClassName = com.mysql.jdbc.Driver jdbc.url = jdbc:mysql:localhost:3306 / auction_nms jdbc.username = root jdbc.password = root
- UserBeans.xml
<!-- User business object -->
- UserDaoImpl .java
public class UserDaoImpl实现UserDao {@Autowired SessionFactory sessionFactory;
/*
* @see com.dao.UserDao#save(com.model.TblUser)
*/
@Override
public void save(TblUser user) {
sessionFactory.getCurrentSession().save(user);
}
7.App.java
public class App {
// get log4j handler
private static final Logger logger = Logger.getLogger(App.class);
static TblUser user = new TblUser(2, "2", "2");
public static void main(String[] args) {
try {
UserDao userDao = new UserDaoImpl();
userDao.save(user);
} catch (Exception e) {
System.err.`enter code here`println(e);
} finally {
if (logger.isDebugEnabled()) {
logger.debug(user);
}
}
}
}
非常感谢你!!!
1 回答
您正在使用
new
关键字创建UserDAO
对象 . 您应该通过加载appContext来启动spring容器,在您的情况下SpringBeans.xml
. 如果您使用new
关键字Spring并不管理您的依赖项,因此,您的sessionFactory
永远不会注入DAO实例 .这应该是你的内容
main()
而不是当前的内容 ...打电话给你保存 .