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Java Spring自动连线服务在部署时设置,但调用时为空_Java_Spring_Model View Controller_Annotations - Fatal编程技术网

Java Spring自动连线服务在部署时设置,但调用时为空

Java Spring自动连线服务在部署时设置,但调用时为空,java,spring,model-view-controller,annotations,Java,Spring,Model View Controller,Annotations,抱歉,如果我的问题搞砸了,我只是刚刚开始配置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时(通过在Spring工具套件中设置断点进行验证),所有的自动连线服务都被成功地自动连线,但当我尝试调用自动连线服务的方法时,我遇到了NullPointerException。我已经查看了所有不同的配置文件,似乎我的servelt上下文、根上下文和web XML文件应该可以(不要引用我的话,它们包含在下面) 我想知道我是否不知何故没有调用在部署时创建的服务实例?

抱歉,如果我的问题搞砸了,我只是刚刚开始配置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时(通过在Spring工具套件中设置断点进行验证),所有的自动连线服务都被成功地自动连线,但当我尝试调用自动连线服务的方法时,我遇到了NullPointerException。我已经查看了所有不同的配置文件,似乎我的servelt上下文、根上下文和web XML文件应该可以(不要引用我的话,它们包含在下面)

我想知道我是否不知何故没有调用在部署时创建的服务实例?似乎奇怪的是,可以成功调用自动连线设置器,但服务最终为空。非常感谢您提供的任何帮助

root-context.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" />
    <?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>
保险注意事项服务:

    public interface InsuranceNoteDBService {

    void insertNote(BillerNote note);

    BillerNote getNoteById(int noteId);

}
保险注意事项: (设置会话工厂的init()方法也会发生同样的情况)

保险注意事项:

    public interface InsuranceNoteDAO {

    void insertNote(BillerNote note);

    BillerNote getNoteById(int noteId);

}

删除init方法并注释setter:

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

iNodeDao的二传似乎不正确。它应该被设置为。您是自动生成setter还是手工编写的?@VaibhavRaj-我是手工编写的,而不是让STS生成它,但是名称应该无关紧要,它是用InsuranceNoteDAO实例调用的。@TheNewIdiot-我不必在spring上下文xml中定义bean,它们应该由Spring的预处理器根据给定给类的注释来提取。这是由设置的,您的意思是您使用新操作符创建了InsuranceNoteDao实例并调用setiNodeDao吗?您是否知道自动连线将只在Spring的bean工厂创建的实例上工作?如果您这样定义servlet,它将被servlet容器实例化。谢谢您的建议!正如您所说,我删除了init方法,并用@Autowired注释了setter,但仍然存在与以前相同的问题。
@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);
    }

}
    public interface InsuranceNoteDAO {

    void insertNote(BillerNote note);

    BillerNote getNoteById(int noteId);

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