java - Spring SessionFactory 注入(inject)问题

Question

我一直在尝试学习使用 Spring 3.0.x 的各种功能，当我尝试将 session 工厂注入(inject) DAO 实现时遇到了一个问题。当我尝试使用注入(inject)的 SessionFactory 实例变量时，我收到 NullPointerException，这使我相信问题存在于 bean 定义中。

dispatcher-servlet.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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

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

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

  <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
    <property name="url" value="jdbc:oracle:thin:@xxx.xxx.x.xxx:xxxx:xx"/>
    <property name="username" value="xxx"/>
    <property name="password" value="xxx"/>
  </bean>

  <bean id="mySessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="myDataSource"/>
    <property name="hibernateProperties">
        <value>
            hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
        </value>
    </property>
  </bean>

</beans>

EntryImpl.java

package com.timerecorder.entity;

import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

@Repository
public class EntryImpl implements EntryDao
{

  private SessionFactory sessionFactory;

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

  @Override
  public boolean saveEntry(EntryForm efd) 
  {
      // Place the details from the entry form into the Entry entity
      Entry e = new Entry();
      e.setId(Long.valueOf(efd.getUserId()));

      this.sessionFactory.getCurrentSession().save(e);

      return true;
  }

  @Override
  public boolean removeEntry(Long id) 
  {
      throw new UnsupportedOperationException("Not supported yet.");
  }

  @Override
  public List getEntries(Long id) 
  {
      throw new UnsupportedOperationException("Not supported yet.");
  }

  @Override
  public Entry getEntry(Long id) 
  {
      return new Entry();
  }

}

如有任何帮助，我们将不胜感激。

亲切的问候，

贾斯汀

Answer 1

看起来这可能是您的 bean 定义中的命名约定问题。

尝试重命名

id=“mySessionFactory”

至

id= "sessionFactory"

请告诉我这是否有帮助。