SessionFactory注入不起作用 [英] SessionFactory injection isn't working

问题描述

我的SessionFactory没有被注入SessionFactory变量。我的配置如下：

 <？xml version =1.0encoding =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-3.2.xsd 
 http://www.springframework.org/schema/beans 
 http://www.springframework.org/ schema / beans / spring-beans-3.2.xsd 
 http://www.springframework.org/schema/context 
 http://www.springframework.org/schema/context/spring-context- 3.2.xsd 
 http://www.springframework.org/schema/tx 
 http://www.springframework.org/schema/tx/spring-tx-3.2.xsd\"> 
 
< mvc：annotation-driven /> 
 
< tx：annotation-driven /> 
 
< context：annotation-config /> 
 
 <！ - 扫描包装中的内容 - > 
< context：component-scan base-package =com.csu.library.mvc/> 
 
 <！ - 映射静态资源，如图像，CSS，JavaScript文件 - > 
< mvc：resources location =/ resources /mapping =/ resources / **/> 
 
< bean class =org.springframework.web.servlet.view.InternalResourceViewResolver> 
< property name =viewClassvalue =org.springframework.web.servlet.view.JstlView/> 
< property name =prefixvalue =/ WEB-INF / jsps //> 
< property name =suffixvalue =.jsp/> 
< / bean> 
 
< bean id =dataSourcedestroy-method =closeclass =org.apache.commons.dbcp.BasicDataSource> 
< property name =driverClassNamevalue =com.mysql.jdbc.Driver/> 
< property name =urlvalue =jdbc：mysql：// localhost：3306 / csu_library/> 
< property name =usernamevalue =csulibrary/> 
< property name =passwordvalue =csulibrary/> 
 
 <！ -  Pool属性 - > 
< property name =initialSizevalue =5/> 
< property name =maxIdlevalue =5/> 
< property name =maxActivevalue =10/> 
< / bean> 
 
< bean id =hibernatePropertiesclass =java.util.Properties> 
< constructor-arg index =0> 
<道具> 
< 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.cglib.use_reflection_optimizer> true< / prop> 
< prop key =hibernate.cache.provider_class> org.hibernate.cache.HashtableCacheProvider< / prop> 
< /道具> 
< / constructor-arg> 
< / bean> 
 
< bean id =sessionFactoryclass =org.springframework.orm.hibernate4.LocalSessionFactoryBean> 
< property name =packagesToScanvalue =com.csu.library.mvc/> 
< property name =dataSourceref =dataSource/> 
< property name =hibernatePropertiesref =hibernateProperties/> 
 
< / bean> 
 
< bean id =transactionManagerclass =org.springframework.orm.hibernate4.HibernateTransactionManager> 
< property name =sessionFactoryref =sessionFactory/> 
< / bean> 
< / beans> 
  

HibernateUtil.class

  package com.csu.library.mvc.hibernate; 
 
 import org.hibernate.SessionFactory; 
 import org.springframework.beans.factory.annotation.Autowired; 
 import org.springframework.beans.factory.annotation.Qualifier; 
 import org.springframework.context.annotation.Bean; 
 import org.springframework.orm.hibernate4.HibernateExceptionTranslator; 
 import org.springframework.orm.hibernate4.HibernateTransactionManager; 
 import org.springframework.transaction.annotation.EnableTransactionManagement; 
 
 @ org.springframework.context.annotation.Configuration 
 @EnableTransactionManagement 
 public class HibernateUtil {
 
 @Autowired 
 @Qualifier（ sessionFactory）
 private SessionFactory sessionFactory; 
 
 public SessionFactory getSessionFactory（）{
 return sessionFactory; 
 
 
 $Be 
 public HibernateTransactionManager transactionManager（）{
 return new HibernateTransactionManager（getSessionFactory（））; 
 
 
 $Be 
 public HibernateExceptionTranslator exceptionTranslator（）{
 return new HibernateExceptionTranslator（）; 
 
 
  

程序抛出 NullPointerException 当调用getSessionFactory（）方法时。显然，sessionFactory没有被注入。该程序启动正常。可能是这样的问题？

解决方案

注入如下，它会正常工作

  @Autowired 
 @Qualifier（sessionFactory）
 private SessionFactory sessionFactory; 
 
 public Session getSession（）{
 return sessionFactory.getCurrentSession（）; 
} 
  

希望能帮到你：

My SessionFactory isn't being injected to SessionFactory variable. My configuration is as follows:

<?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-3.2.xsd
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">

    <mvc:annotation-driven/>

    <tx:annotation-driven/>

    <context:annotation-config/>

    <!-- Scans the package for contents -->
    <context:component-scan base-package="com.csu.library.mvc"/>

    <!-- Maps static resources like images, css, javascript files -->
    <mvc:resources location="/resources/" mapping="/resources/**"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name = "viewClass" value = "org.springframework.web.servlet.view.JstlView"/>
        <property name = "prefix" value = "/WEB-INF/jsps/"/>
        <property name = "suffix" value = ".jsp"/>
    </bean>

    <bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/csu_library"/>
        <property name="username" value="csulibrary"/>
        <property name="password" value="csulibrary"/>

        <!-- Pool Properties -->
        <property name="initialSize" value="5" />
        <property name="maxIdle" value="5" />
        <property name="maxActive" value="10" />
    </bean>

    <bean id = "hibernateProperties" class = "java.util.Properties">
        <constructor-arg index="0">
            <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.cglib.use_reflection_optimizer">true</prop>
                <prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>
            </props>
        </constructor-arg>
    </bean>

    <bean id = "sessionFactory" class = "org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="packagesToScan" value = "com.csu.library.mvc"/>
        <property name="dataSource" ref = "dataSource"/>        
        <property name="hibernateProperties" ref = "hibernateProperties"/>

    </bean>

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

HibernateUtil.class

package com.csu.library.mvc.hibernate;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.orm.hibernate4.HibernateExceptionTranslator;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@org.springframework.context.annotation.Configuration
@EnableTransactionManagement
public class HibernateUtil {

    @Autowired
    @Qualifier("sessionFactory")
    private SessionFactory sessionFactory;

    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    @Bean
    public HibernateTransactionManager transactionManager() {
        return new HibernateTransactionManager(getSessionFactory());
    }

    @Bean
    public HibernateExceptionTranslator exceptionTranslator() {
        return new HibernateExceptionTranslator();
    }
}

The program throws NullPointerException when getSessionFactory() method is called. Obviously, sessionFactory isn't being injected. The program starts up fine. What could be the problem?

解决方案

inject like following, it'll work fine

@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;

public Session getSession() {
    return sessionFactory.getCurrentSession();
}

Hope to help you:)

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