我试图将spring hibernate和struts 2一起使用。应用程序部署成功。但是当试图访问一个spring bean时,我得到了NullPointerException。 下面是代码UsersBo是一类Struts + spring + hibernate Spring bean空指针异常
@Autowired
private UsersBo ubo;
public void setUbo(UsersBo ubo) {
this.ubo = ubo;
}
public UsersBo getUbo() {
return ubo;
}
我检查,找出UDO为空。以下是配置文件。
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<!-- Hibernate session factory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" scope="singleton">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
<property name="annotatedClasses">
<list>
<value>com.riteshsangwan.ossoc.entities.Users</value>
<value>com.riteshsangwan.ossoc.entities.Files</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</prop>
</props>
</property>
</bean>
</beans>
的DataSource豆
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/ossoc;create=true" />
<property name="username" value="root" />
<property name="password" value="deflection" />
</bean>
</beans>
的applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<!-- Database Configuration -->
<import resource="DataSource.xml"/>
<import resource="HibernateSessionFactory.xml"/>
<!-- Beans Declaration -->
<import resource="UsersBean.xml"/>
</beans>
的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>ossoc</display-name>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
<!-- Filter Start -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<!-- Filter End -->
<!-- Filter Mapping Start -->
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Filter Mapping End -->
<!-- Listener Start -->
<!-- Spring Start -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
用户豆
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="loginAction" class="com.riteshsangwan.ossoc.actions.LoginAction">
<property name="ubo" ref="usersBo" />
</bean>
<bean id="usersBo" class="com.riteshsangwan.ossoc.business.UsersBoImpl" >
<property name="udao" ref="usersDAOImpl" />
</bean>
<bean id="usersDAOImpl" class="com.riteshsangwan.ossoc.business.UsersDAOImpl" >
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
我加了注释@Repository
级以上defintation
您已添加> @Repository以上哪个类?第一个代码是来自LoginAction的代码吗? - 如果是这样,你不需要设置属性 - > @Autowire负责。 –
HellishHeat
@HellishHeat https://drive.google.com/file/d/0B0wH8cXp0qN4SU1rNnhyYW5Pcmc/edit?usp=sharing 看一下我正在上传zip文件。我被困在过去的4天。 – user3108790