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抱歉，如果我的问题搞砸了，我刚刚开始配置 MVC、Spring 等......

我遇到的问题是，在我的 Spring MVC 项目中，当我的应用程序部署（通过在 Spring Tool Suite 中设置断点进行验证）时，我的所有 Autowired 服务都已成功自动装配，但是当我尝试调用自动装配服务的方法时，我运行进入 NullPointerException。我已经查看了不同的配置文件，似乎我的 servelt-context、root-context 和 web XML 文件应该没问题（不要引用我的话，它们包含在下面）。

我想知道是否以某种方式我没有调用在部署时创建的服务实例？可以成功调用 Autowired 设置器但随后服务最终为空，这似乎很奇怪。非常感谢您提供的任何帮助！

根上下文.xml：

   <?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect
            </prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
    <property name="packagesToScan" value="com.byteslounge.spring.tx.model" />
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <property name="driverClassName" value="oracle.jdbc.driver.OracleDrive" />
    <property name="url"
        value="jdbc:oracle:thin:@**********" />
    <property name="username" value="*******" />
    <property name="password" value="*******" />
</bean>

<bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="dataSource" ref="dataSource" />
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

<tx:annotation-driven />

<context:annotation-config />

<bean
    class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

<context:component-scan base-package="com.clm.billing" />

servelt-context.xml：

    <?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:beans="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- DispatcherServlet Context: defines this servlet's request-processing 
        infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <mvc:annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving 
        up static resources in the ${webappRoot}/resources directory -->
    <mvc:resources mapping="/resources/**" location="/resources/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources 
        in the /WEB-INF/views directory -->
    <beans:bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>

</beans:beans>

网页.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_2_5.xsd" version="2.5">
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring/root-context.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <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>
  <servlet>
    <description></description>
    <display-name>OrderList</display-name>
    <servlet-name>OrderList</servlet-name>
    <servlet-class>com.clm.billing.Oracle.OrderList</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>OrderList</servlet-name>
    <url-pattern>/OrderList</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>EditBilling</display-name>
    <servlet-name>EditBilling</servlet-name>
    <servlet-class>com.clm.billing.EditBilling</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>EditBilling</servlet-name>
    <url-pattern>/EditBilling</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>UpdateBilling</display-name>
    <servlet-name>UpdateBilling</servlet-name>
    <servlet-class>com.clm.billing.UpdateBilling</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>UpdateBilling</servlet-name>
    <url-pattern>/UpdateBilling</url-pattern>
  </servlet-mapping>
</web-app>

InsuranceNoteDBServiceImpl：（这里 setiNoteDAO 是用 iNoteDAO 类的实例调用的，但是当 getNoteById 被调用时，iNoteDAO 为空）

    @Service
public class InsuranceNoteDBServiceImpl implements InsuranceNoteDBService {

    private InsuranceNoteDAO iNoteDAO;

    @Autowired
    public void setiNoteDAO(InsuranceNoteDAO iNoteDAO) {
        this.iNoteDAO = iNoteDAO;
    }

    @Override
    @Transactional
    public void insertNote(BillerNote note) {
        iNoteDAO.insertNote(note);

    }

    @Override
    @Transactional
    public BillerNote getNoteById(int noteId) {
        return iNoteDAO.getNoteById(noteId);
    }

}

InsuranceNoteDB服务：

    public interface InsuranceNoteDBService {

    void insertNote(BillerNote note);

    BillerNote getNoteById(int noteId);

}

InsuranceNoteDAOImpl：（设置会话工厂的 init() 方法也会发生同样的事情）

@Service
public class InsuranceNoteDAOImpl implements InsuranceNoteDAO {

    public SessionFactory sessionFactory;

    @Autowired
    public void init(SessionFactory factory) {
        setSessionFactory(factory);
    }

    public void setSessionFactory(SessionFactory factory) {
        this.sessionFactory = factory;
    }

    @Override
    public void insertNote(BillerNote note) {
        sessionFactory.getCurrentSession().save(note);
    }

    @Override
    public BillerNote getNoteById(int noteId) {
        return (BillerNote) sessionFactory.
                  getCurrentSession().
                  get(BillerNote.class, noteId);
    }

}

保险注意DAO：

    public interface InsuranceNoteDAO {

    void insertNote(BillerNote note);

    BillerNote getNoteById(int noteId);

}
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1 回答 1

0

删除 init 方法并注释 setter ：

@Autowired
public void setSessionFactory(SessionFactory factory) {
    this.sessionFactory = factory;
}
于 2013-06-19T16:22:02.587 回答